1. 10 Jan, 2011 1 commit
  2. 15 Aug, 2010 1 commit
  3. 22 Jul, 2010 1 commit
  4. 21 May, 2010 1 commit
  5. 15 Mar, 2010 2 commits
  6. 17 Feb, 2010 1 commit
    • Tejun Heo's avatar
      percpu: add __percpu sparse annotations to what's left · a29d8b8e
      Tejun Heo authored
      Add __percpu sparse annotations to places which didn't make it in one
      of the previous patches.  All converions are trivial.
      
      These annotations are to make sparse consider percpu variables to be
      in a different address space and warn if accessed without going
      through percpu accessors.  This patch doesn't affect normal builds.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Acked-by: default avatarBorislav Petkov <borislav.petkov@amd.com>
      Cc: Dan Williams <dan.j.williams@intel.com>
      Cc: Huang Ying <ying.huang@intel.com>
      Cc: Len Brown <lenb@kernel.org>
      Cc: Neil Brown <neilb@suse.de>
      a29d8b8e
  7. 28 Jan, 2010 1 commit
  8. 22 Dec, 2009 5 commits
    • Alex Chiang's avatar
      ACPI: processor: remove _PDC object list from struct acpi_processor · e59897fe
      Alex Chiang authored
      When we call _PDC, we get a handle to the processor, allocate the
      object list buffer as needed, and free it immediately after calling
      _PDC.
      
      There's no need to drag around this object list with us everywhere
      else, so let's just get rid of it.
      Signed-off-by: default avatarAlex Chiang <achiang@hp.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      e59897fe
    • Alex Chiang's avatar
      ACPI: processor: change acpi_processor_set_pdc() interface · 43bab25c
      Alex Chiang authored
      When calling _PDC, we really only need the handle to the processor
      to call the method; we don't look at any other parts of the
      struct acpi_processor * given to us.
      
      In the early path, when we walk the namespace, we are given the
      handle directly, so just pass it through to acpi_processor_set_pdc()
      without stuffing it into a wasteful struct acpi_processor allocated
      on the stack each time
      
      This saves 2834 bytes of stack.
      
      Update the interface accordingly.
      Signed-off-by: default avatarAlex Chiang <achiang@hp.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      43bab25c
    • Alex Chiang's avatar
      ACPI: processor: unify arch_acpi_processor_cleanup_pdc · 47817254
      Alex Chiang authored
      The x86 and ia64 implementations of the function in $subject are
      exactly the same.
      
      Also, since the arch-specific implementations of setting _PDC have
      been completely hollowed out, remove the empty shells.
      
      Cc: Tony Luck <tony.luck@intel.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Signed-off-by: default avatarAlex Chiang <achiang@hp.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      47817254
    • Alex Chiang's avatar
      ACPI: processor: finish unifying arch_acpi_processor_init_pdc() · 6c5807d7
      Alex Chiang authored
      The only thing arch-specific about calling _PDC is what bits get
      set in the input obj_list buffer.
      
      There's no need for several levels of indirection to twiddle those
      bits. Additionally, since we're just messing around with a buffer,
      we can simplify the interface; no need to pass around the entire
      struct acpi_processor * just to get at the buffer.
      
      Cc: Tony Luck <tony.luck@intel.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Signed-off-by: default avatarAlex Chiang <achiang@hp.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      6c5807d7
    • Alex Chiang's avatar
      ACPI: processor: call _PDC early · 78f16996
      Alex Chiang authored
      We discovered that at least one machine (HP Envy), methods in the DSDT
      attempt to call external methods defined in a dynamically loaded SSDT.
      
      Unfortunately, the DSDT methods we are trying to call are part of the
      EC initialization, which happens very early, and the the dynamic SSDT
      is only loaded when a processor _PDC method runs much later.
      
      This results in namespace lookup errors for the (as of yet) undefined
      methods.
      
      Since Windows doesn't have any issues with this machine, we take it
      as a hint that they must be evaluating _PDC much earlier than we are.
      
      Thus, the proper thing for Linux to do should be to match the Windows
      implementation more closely.
      
      Provide a mechanism to call _PDC before we enable the EC. Doing so loads
      the dynamic tables, and allows the EC to be enabled correctly.
      
      The ACPI processor driver will still evaluate _PDC in its .add() method
      to cover the hotplug case.
      
      Resolves: http://bugzilla.kernel.org/show_bug.cgi?id=14824
      
      Cc: ming.m.lin@intel.com
      Signed-off-by: default avatarAlex Chiang <achiang@hp.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      78f16996
  9. 24 Nov, 2009 1 commit
    • Thomas Renninger's avatar
      [ACPI/CPUFREQ] Introduce bios_limit per cpu cpufreq sysfs interface · e2f74f35
      Thomas Renninger authored
      This interface is mainly intended (and implemented) for ACPI _PPC BIOS
      frequency limitations, but other cpufreq drivers can also use it for
      similar use-cases.
      
      Why is this needed:
      
      Currently it's not obvious why cpufreq got limited.
      People see cpufreq/scaling_max_freq reduced, but this could have
      happened by:
        - any userspace prog writing to scaling_max_freq
        - thermal limitations
        - hardware (_PPC in ACPI case) limitiations
      
      Therefore export bios_limit (in kHz) to:
        - Point the user that it's the BIOS (broken or intended) which limits
          frequency
        - Export it as a sysfs interface for userspace progs.
          While this was a rarely used feature on laptops, there will appear
          more and more server implemenations providing "Green IT" features like
          allowing the service processor to limit the frequency. People want
          to know about HW/BIOS frequency limitations.
      
      All ACPI P-state driven cpufreq drivers are covered with this patch:
        - powernow-k8
        - powernow-k7
        - acpi-cpufreq
      
      Tested with a patched DSDT which limits the first two cores (_PPC returns 1)
      via _PPC, exposed by bios_limit:
      # echo 2200000 >cpu2/cpufreq/scaling_max_freq
      # cat cpu*/cpufreq/scaling_max_freq
      2600000
      2600000
      2200000
      2200000
      # #scaling_max_freq shows general user/thermal/BIOS limitations
      
      # cat cpu*/cpufreq/bios_limit
      2600000
      2600000
      2800000
      2800000
      # #bios_limit only shows the HW/BIOS limitation
      
      CC: Pallipadi Venkatesh <venkatesh.pallipadi@intel.com>
      CC: Len Brown <lenb@kernel.org>
      CC: davej@codemonkey.org.uk
      CC: linux@dominikbrodowski.net
      Signed-off-by: Thomas Renninger's avatarThomas Renninger <trenn@suse.de>
      Signed-off-by: default avatarDave Jones <davej@redhat.com>
      e2f74f35
  10. 06 Nov, 2009 1 commit
    • Zhao Yakui's avatar
      ACPI: Notify the _PPC evaluation status to the platform · d81c45e1
      Zhao Yakui authored
      According to the ACPI spec(section 8.4.4.3) OSPM should convey the _PPC
      evaluations status to the platform if there exists the _OST object.
      The _OST contains two arguments:
      	The first is the PERFORMANCE notificatin event.
      	The second is the status of _PPC object.
      OSPM will convey the _PPC evaluation status to the platform.
      Of course when the module parameter of "ignore_ppc" is added, OSPM won't
      evaluate the _PPC object. But it will call the _OST object.
      
      At the same time the _OST object will be evaluated only when the PERFORMANCE
      notification event is received.
      Signed-off-by: default avatarZhao Yakui <yakui.zhao@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      d81c45e1
  11. 27 Aug, 2009 1 commit
  12. 20 Jun, 2009 1 commit
  13. 22 Apr, 2009 1 commit
  14. 04 Apr, 2009 1 commit
  15. 03 Jan, 2009 1 commit
  16. 16 Jul, 2008 1 commit
  17. 11 Jun, 2008 1 commit
  18. 14 Feb, 2008 1 commit
  19. 07 Feb, 2008 1 commit
  20. 03 Feb, 2008 1 commit
  21. 02 Feb, 2008 2 commits
    • Zhao Yakui's avatar
      ACPI : Update T-state coordination after getting _TSD info · 1180509f
      Zhao Yakui authored
      Accordint to ACPI spec, the _TSD object provides T-state control cross
      logical processor dependency information to OSPM.
      After the _TSD data for all cpus are obtained, OSPM will set up
      the T-state coordination between CPUs.
      
      Of course if the _TSD doesn't exist or _TSD data is incorrect , it is
      assumed that there is no T-state coordination and T-state is changed
      independently.
      
      Now there is no proper solution to update T-state coordination after
      one cpu is hotplugged. So this patch won't support hotplugged cpu very well.
      Signed-off-by: default avatarZhao Yakui <yakui.zhao@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      1180509f
    • Zhang Rui's avatar
      ACPI: register ACPI Processor as generic thermal cooling device · d9460fd2
      Zhang Rui authored
      Register ACPI processor as thermal cooling devices.
      A combination of processor T-state and P-state are used for thermal throttling.
      the processor will reduce the frequency first and then set the T-state.
      
      we use cpufreq_thermal_reduction_pctg to calculate the cpufreq limit,
      and call cpufreq_verify_with_limit to set the cpufreq limit.
      if cpufreq driver is loaded, then we have four cooling state for cpufreq control.
      cooling state 0: cpufreq limit == max_freq
      cooling state 1: cpufreq limit == max_freq * 80%
      cooling state 2: cpufreq limit == max_freq * 60%
      cooling state 3: cpufreq limit == max_freq * 40%
      
      after the cpufreq limit is set to 40 percentage of the max_freq,
      we use T-state for cooling.
      
      eg. a processor has P-state support, and it has 8 T-state (T0-T7),
      the max_state of the proceesor is 10:
      
      state	cpufreq-limit  T-state
      0:	max_freq	T0
      1:	max_freq * 80%	T0
      2:	max_freq * 60%	T0
      3:	max_freq * 40%	T0
      4:	max_freq * 40%	T1
      5:	max_freq * 40%	T2
      6:	max_freq * 40%	T3
      7:	max_freq * 40%	T4
      8:	max_freq * 40%	T5
      9:	max_freq * 40%	T6
      10:	max_freq * 40%	T7
      Signed-off-by: default avatarZhang Rui <rui.zhang@intel.com>
      Signed-off-by: default avatarZhao Yakui <yakui.zhao@intel.com>
      Signed-off-by: default avatarThomas Sujith <sujith.thomas@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      d9460fd2
  22. 20 Nov, 2007 1 commit
  23. 10 Oct, 2007 1 commit
    • Len Brown's avatar
      cpuidle: consolidate 2.6.22 cpuidle branch into one patch · 4f86d3a8
      Len Brown authored
      commit e5a16b1f9eec0af7cfa0830304b41c1c0833cf9f
      Author: Len Brown <len.brown@intel.com>
      Date:   Tue Oct 2 23:44:44 2007 -0400
      
          cpuidle: shrink diff
      
          processor_idle.c |  440 +++++++++++++++++++++++++++++++++++++++++--
          1 file changed, 429 insertions(+), 11 deletions(-)
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit dfbb9d5aedfb18848a3e0d6f6e3e4969febb209c
      Author: Len Brown <len.brown@intel.com>
      Date:   Wed Sep 26 02:17:55 2007 -0400
      
          cpuidle: reduce diff size
      
          Reduces the cpuidle processor_idle.c diff vs 2.6.22 from this
           processor_idle.c | 2006 ++++++++++++++++++++++++++-----------------
           1 file changed, 1219 insertions(+), 787 deletions(-)
      
          to this:
           processor_idle.c |  502 +++++++++++++++++++++++++++++++++++++++----
           1 file changed, 458 insertions(+), 44 deletions(-)
      
          ...for the purpose of making the cpuilde patch less invasive
          and easier to review.
      
          no functional changes.  build tested only.
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 889172fc915f5a7fe20f35b133cbd205ce69bf6c
      Author: Venki Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Thu Sep 13 13:40:05 2007 -0700
      
          cpuidle: Retain old ACPI policy for !CONFIG_CPU_IDLE
      
          Retain the old policy in processor_idle, so that when CPU_IDLE is not
          configured, old C-state policy will still be used. This provides a
          clean gradual migration path from old ACPI policy to new cpuidle
          based policy.
      Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 9544a8181edc7ecc33b3bfd69271571f98ed08bc
      Author: Venki Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Thu Sep 13 13:39:17 2007 -0700
      
          cpuidle: Configure governors by default
      
          Quoting Len "Do not give an option to users to shoot themselves in the foot".
      
          Remove the configurability of ladder and menu governors as they are
          needed for default policy of cpuidle. That way users will not be able to
          have cpuidle without any policy loosing all C-state power savings.
      Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 8975059a2c1e56cfe83d1bcf031bcf4cb39be743
      Author: Adam Belay <abelay@novell.com>
      Date:   Tue Aug 21 18:27:07 2007 -0400
      
          CPUIDLE: load ACPI properly when CPUIDLE is disabled
      
          Change the registration return codes for when CPUIDLE
          support is not compiled into the kernel.  As a result, the ACPI
          processor driver will load properly even if CPUIDLE is unavailable.
          However, it may be possible to cleanup the ACPI processor driver further
          and eliminate some dead code paths.
      Signed-off-by: default avatarAdam Belay <abelay@novell.com>
      Acked-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit e0322e2b58dd1b12ec669bf84693efe0dc2414a8
      Author: Adam Belay <abelay@novell.com>
      Date:   Tue Aug 21 18:26:06 2007 -0400
      
          CPUIDLE: remove cpuidle_get_bm_activity()
      
          Remove cpuidle_get_bm_activity() and updates governors
          accordingly.
      Signed-off-by: default avatarAdam Belay <abelay@novell.com>
      Acked-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 18a6e770d5c82ba26653e53d240caa617e09e9ab
      Author: Adam Belay <abelay@novell.com>
      Date:   Tue Aug 21 18:25:58 2007 -0400
      
          CPUIDLE: max_cstate fix
      
          Currently max_cstate is limited to 0, resulting in no idle processor
          power management on ACPI platforms.  This patch restores the value to
          the array size.
      Signed-off-by: default avatarAdam Belay <abelay@novell.com>
      Acked-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 1fdc0887286179b40ce24bcdbde663172e205ef0
      Author: Adam Belay <abelay@novell.com>
      Date:   Tue Aug 21 18:25:40 2007 -0400
      
          CPUIDLE: handle BM detection inside the ACPI Processor driver
      
          Update the ACPI processor driver to detect BM activity and
          limit state entry depth internally, rather than exposing such
          requirements to CPUIDLE.  As a result, CPUIDLE can drop this
          ACPI-specific interface and become more platform independent.  BM
          activity is now handled much more aggressively than it was in the
          original implementation, so some testing coverage may be needed to
          verify that this doesn't introduce any DMA buffer under-run issues.
      Signed-off-by: default avatarAdam Belay <abelay@novell.com>
      Acked-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 0ef38840db666f48e3cdd2b769da676c57228dd9
      Author: Adam Belay <abelay@novell.com>
      Date:   Tue Aug 21 18:25:14 2007 -0400
      
          CPUIDLE: menu governor updates
      
          Tweak the menu governor to more effectively handle non-timer
          break events.  Non-timer break events are detected by comparing the
          actual sleep time to the expected sleep time.  In future revisions, it
          may be more reliable to use the timer data structures directly.
      Signed-off-by: default avatarAdam Belay <abelay@novell.com>
      Acked-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit bb4d74fca63fa96cf3ace644b15ae0f12b7df5a1
      Author: Adam Belay <abelay@novell.com>
      Date:   Tue Aug 21 18:24:40 2007 -0400
      
          CPUIDLE: fix 'current_governor' sysfs entry
      
          Allow the "current_governor" sysfs entry to properly handle
          input terminated with '\n'.
      Signed-off-by: default avatarAdam Belay <abelay@novell.com>
      Acked-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit df3c71559bb69b125f1a48971bf0d17f78bbdf47
      Author: Len Brown <len.brown@intel.com>
      Date:   Sun Aug 12 02:00:45 2007 -0400
      
          cpuidle: fix IA64 build (again)
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit a02064579e3f9530fd31baae16b1fc46b5a7bca8
      Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Sun Aug 12 01:39:27 2007 -0400
      
          cpuidle: Remove support for runtime changing of max_cstate
      
          Remove support for runtime changeability of max_cstate. Drivers can use
          use latency APIs.
      
          max_cstate can still be used as a boot time option and dmi override.
      Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 0912a44b13adf22f5e3f607d263aed23b4910d7e
      Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Sun Aug 12 01:39:16 2007 -0400
      
          cpuidle: Remove ACPI cstate_limit calls from ipw2100
      
          ipw2100 already has code to use accetable_latency interfaces to limit the
          C-state. Remove the calls to acpi_set_cstate_limit and acpi_get_cstate_limit
          as they are redundant.
      Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit c649a76e76be6bff1fd770d0a775798813a3f6e0
      Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Sun Aug 12 01:35:39 2007 -0400
      
          cpuidle: compile fix for pause and resume functions
      
          Fix the compilation failure when cpuidle is not compiled in.
      Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Acked-by: default avatarAdam Belay <adam.belay@novell.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 2305a5920fb8ee6ccec1c62ade05aa8351091d71
      Author: Adam Belay <abelay@novell.com>
      Date:   Thu Jul 19 00:49:00 2007 -0400
      
          cpuidle: re-write
      
          Some portions have been rewritten to make the code cleaner and lighter
          weight.  The following is a list of changes:
      
          1.) the state name is now included in the sysfs interface
          2.) detection, hotplug, and available state modifications are handled by
          CPUIDLE drivers directly
          3.) the CPUIDLE idle handler is only ever installed when at least one
          cpuidle_device is enabled and ready
          4.) the menu governor BM code no longer overflows
          5.) the sysfs attributes are now printed as unsigned integers, avoiding
          negative values
          6.) a variety of other small cleanups
      
          Also, Idle drivers are no longer swappable during runtime through the
          CPUIDLE sysfs inteface.  On i386 and x86_64 most idle handlers (e.g.
          poll, mwait, halt, etc.) don't benefit from an infrastructure that
          supports multiple states, so I think using a more general case idle
          handler selection mechanism would be cleaner.
      Signed-off-by: default avatarAdam Belay <abelay@novell.com>
      Acked-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Acked-by: default avatarShaohua Li <shaohua.li@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit df25b6b56955714e6e24b574d88d1fd11f0c3ee5
      Author: Len Brown <len.brown@intel.com>
      Date:   Tue Jul 24 17:08:21 2007 -0400
      
          cpuidle: fix IA64 buid
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit fd6ada4c14488755ff7068860078c437431fbccd
      Author: Adrian Bunk <bunk@stusta.de>
      Date:   Mon Jul 9 11:33:13 2007 -0700
      
          cpuidle: static
      
          make cpuidle_replace_governor() static
      Signed-off-by: Adrian Bunk's avatarAdrian Bunk <bunk@stusta.de>
          Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit c1d4a2cebcadf2429c0c72e1d29aa2a9684c32e0
      Author: Adrian Bunk <bunk@stusta.de>
      Date:   Tue Jul 3 00:54:40 2007 -0400
      
          cpuidle: static
      
          This patch makes the needlessly global struct menu_governor static.
      Signed-off-by: Adrian Bunk's avatarAdrian Bunk <bunk@stusta.de>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit dbf8780c6e8d572c2c273da97ed1cca7608fd999
      Author: Andrew Morton <akpm@linux-foundation.org>
      Date:   Tue Jul 3 00:49:14 2007 -0400
      
          export symbol tick_nohz_get_sleep_length
      
          ERROR: "tick_nohz_get_sleep_length" [drivers/cpuidle/governors/menu.ko] undefined!
          ERROR: "tick_nohz_get_idle_jiffies" [drivers/cpuidle/governors/menu.ko] undefined!
      
          And please be sure to get your changes to core kernel suitably reviewed.
      
          Cc: Adam Belay <abelay@novell.com>
          Cc: Venki Pallipadi <venkatesh.pallipadi@intel.com>
          Cc: Ingo Molnar <mingo@elte.hu>
          Cc: Thomas Gleixner <tglx@linutronix.de>
          Cc: john stultz <johnstul@us.ibm.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 29f0e248e7017be15f99febf9143a2cef00b2961
      Author: Andrew Morton <akpm@linux-foundation.org>
      Date:   Tue Jul 3 00:43:04 2007 -0400
      
          tick.h needs hrtimer.h
      
          It uses hrtimers.
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit e40cede7d63a029e92712a3fe02faee60cc38fb4
      Author: Venki Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Tue Jul 3 00:40:34 2007 -0400
      
          cpuidle: first round of documentation updates
      
          Documentation changes based on Pavel's feedback.
      Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 83b42be2efece386976507555c29e7773a0dfcd1
      Author: Venki Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Tue Jul 3 00:39:25 2007 -0400
      
          cpuidle: add rating to the governors and pick the one with highest rating by default
      
          Introduce a governor rating scheme to pick the right governor by default.
      Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit d2a74b8c5e8f22def4709330d4bfc4a29209b71c
      Author: Venki Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Tue Jul 3 00:38:08 2007 -0400
      
          cpuidle: make cpuidle sysfs driver governor switch off by default
      
          Make default cpuidle sysfs to show current_governor and current_driver in
          read-only mode.  More elaborate available_governors and available_drivers with
          writeable current_governor and current_driver interface only appear with
          "cpuidle_sysfs_switch" boot parameter.
      Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 1f60a0e80bf83cf6b55c8845bbe5596ed8f6307b
      Author: Venki Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Tue Jul 3 00:37:00 2007 -0400
      
          cpuidle: menu governor: change the early break condition
      
          Change the C-state early break out algorithm in menu governor.
      
          We only look at early breakouts that result in wakeups shorter than idle
          state's target_residency.  If such a breakout is frequent enough, eliminate
          the particular idle state upto a timeout period.
      Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 45a42095cf64b003b4a69be3ce7f434f97d7af51
      Author: Venki Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Tue Jul 3 00:35:38 2007 -0400
      
          cpuidle: fix uninitialized variable in sysfs routine
      
          Fix the uninitialized usage of ret.
      Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 80dca7cdba3e6ee13eae277660873ab9584eb3be
      Author: Venki Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Tue Jul 3 00:34:16 2007 -0400
      
          cpuidle: reenable /proc/acpi//power interface for the time being
      
          Keep /proc/acpi/processor/CPU*/power around for a while as powertop depends
          on it. It will be marked deprecated and removed in future. powertop can use
          cpuidle interfaces instead.
      Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 589c37c2646c5e3813a51255a5ee1159cb4c33fc
      Author: Venki Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Tue Jul 3 00:32:37 2007 -0400
      
          cpuidle: menu governor and hrtimer compile fix
      
          Compile fix for menu governor.
      Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 0ba80bd9ab3ed304cb4f19b722e4cc6740588b5e
      Author: Len Brown <len.brown@intel.com>
      Date:   Thu May 31 22:51:43 2007 -0400
      
          cpuidle: build fix - cpuidle vs ipw2100 module
      
          ERROR: "acpi_set_cstate_limit" [drivers/net/wireless/ipw2100.ko] undefined!
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit d7d8fa7f96a7f7682be7c6cc0cc53fa7a18c3b58
      Author: Adam Belay <abelay@novell.com>
      Date:   Sat Mar 24 03:47:07 2007 -0400
      
          cpuidle: add the 'menu' governor
      
          Here is my first take at implementing an idle PM governor that takes
          full advantage of NO_HZ.  I call it the 'menu' governor because it
          considers the full list of idle states before each entry.
      
          I've kept the implementation fairly simple.  It attempts to guess the
          next residency time and then chooses a state that would meet at least
          the break-even point between power savings and entry cost.  To this end,
          it selects the deepest idle state that satisfies the following
          constraints:
               1. If the idle time elapsed since bus master activity was detected
                  is below a threshold (currently 20 ms), then limit the selection
                  to C2-type or above.
               2. Do not choose a state with a break-even residency that exceeds
                  the expected time remaining until the next timer interrupt.
               3. Do not choose a state with a break-even residency that exceeds
                  the elapsed time between the last pair of break events,
                  excluding timer interrupts.
      
          This governor has an advantage over "ladder" governor because it
          proactively checks how much time remains until the next timer interrupt
          using the tick infrastructure.  Also, it handles device interrupt
          activity more intelligently by not including timer interrupts in break
          event calculations.  Finally, it doesn't make policy decisions using the
          number of state entries, which can have variable residency times (NO_HZ
          makes these potentially very large), and instead only considers sleep
          time deltas.
      
          The menu governor can be selected during runtime using the cpuidle sysfs
          interface like so:
          "echo "menu" > /sys/devices/system/cpu/cpuidle/current_governor"
      Signed-off-by: default avatarAdam Belay <abelay@novell.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit a4bec7e65aa3b7488b879d971651cc99a6c410fe
      Author: Adam Belay <abelay@novell.com>
      Date:   Sat Mar 24 03:47:03 2007 -0400
      
          cpuidle: export time until next timer interrupt using NO_HZ
      
          Expose information about the time remaining until the next
          timer interrupt expires by utilizing the dynticks infrastructure.
          Also modify the main idle loop to allow dynticks to handle
          non-interrupt break events (e.g. DMA).  Finally, expose sleep ticks
          information to external code.  Thomas Gleixner is responsible for much
          of the code in this patch.  However, I've made some additional changes,
          so I'm probably responsible if there are any bugs or oversights :)
      Signed-off-by: default avatarAdam Belay <abelay@novell.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 2929d8996fbc77f41a5ff86bb67cdde3ca7d2d72
      Author: Adam Belay <abelay@novell.com>
      Date:   Sat Mar 24 03:46:58 2007 -0400
      
          cpuidle: governor API changes
      
          This patch prepares cpuidle for the menu governor.  It adds an optional
          stage after idle state entry to give the governor an opportunity to
          check why the state was exited.  Also it makes sure the idle loop
          returns after each state entry, allowing the appropriate dynticks code
          to run.
      Signed-off-by: default avatarAdam Belay <abelay@novell.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 3a7fd42f9825c3b03e364ca59baa751bb350775f
      Author: Venki Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Thu Apr 26 00:03:59 2007 -0700
      
          cpuidle: hang fix
      
          Prevent hang on x86-64, when ACPI processor driver is added as a module on
          a system that does not support C-states.
      
          x86-64 expects all idle handlers to enable interrupts before returning from
          idle handler.  This is due to enter_idle(), exit_idle() races.  Make
          cpuidle_idle_call() confirm to this when there is no pm_idle_old.
      
          Also, cpuidle look at the return values of attch_driver() and set
          current_driver to NULL if attach fails on all CPUs.
      Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 4893339a142afbd5b7c01ffadfd53d14746e858e
      Author: Shaohua Li <shaohua.li@intel.com>
      Date:   Thu Apr 26 10:40:09 2007 +0800
      
          cpuidle: add support for max_cstate limit
      
          With CPUIDLE framework, the max_cstate (to limit max cpu c-state)
          parameter is ingored. Some systems require it to ignore C2/C3
          and some drivers like ipw require it too.
      Signed-off-by: default avatarShaohua Li <shaohua.li@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 43bbbbe1cb998cbd2df656f55bb3bfe30f30e7d1
      Author: Shaohua Li <shaohua.li@intel.com>
      Date:   Thu Apr 26 10:40:13 2007 +0800
      
          cpuidle: add cpuidle_fore_redetect_devices API
      
          add cpuidle_force_redetect_devices API,
          which forces all CPU redetect idle states.
          Next patch will use it.
      Signed-off-by: default avatarShaohua Li <shaohua.li@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit d1edadd608f24836def5ec483d2edccfb37b1d19
      Author: Shaohua Li <shaohua.li@intel.com>
      Date:   Thu Apr 26 10:40:01 2007 +0800
      
          cpuidle: fix sysfs related issue
      
          Fix the cpuidle sysfs issue.
          a. make kobject dynamicaly allocated
          b. fixed sysfs init issue to avoid suspend/resume issue
      Signed-off-by: default avatarShaohua Li <shaohua.li@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 7169a5cc0d67b263978859672e86c13c23a5570d
      Author: Randy Dunlap <randy.dunlap@oracle.com>
      Date:   Wed Mar 28 22:52:53 2007 -0400
      
          cpuidle: 1-bit field must be unsigned
      
          A 1-bit bitfield has no room for a sign bit.
          drivers/cpuidle/governors/ladder.c:54:16: error: dubious bitfield without explicit `signed' or `unsigned'
      Signed-off-by: default avatarRandy Dunlap <randy.dunlap@oracle.com>
          Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 4658620158dc2fbd9e4bcb213c5b6fb5d05ba7d4
      Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Wed Mar 28 22:52:41 2007 -0400
      
          cpuidle: fix boot hang
      
          Patch for cpuidle boot hang reported by Larry Finger here.
          http://www.ussg.iu.edu/hypermail/linux/kernel/0703.2/2025.htmlSigned-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
          Cc: Larry Finger <larry.finger@lwfinger.net>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit c17e168aa6e5fe3851baaae8df2fbc1cf11443a9
      Author: Len Brown <len.brown@intel.com>
      Date:   Wed Mar 7 04:37:53 2007 -0500
      
          cpuidle: ladder does not depend on ACPI
      
          build fix for CONFIG_ACPI=n
      
          In file included from drivers/cpuidle/governors/ladder.c:21:
          include/acpi/processor.h:88: error: expected specifier-qualifier-list before ‘acpi_integer’
          include/acpi/processor.h:106: error: expected specifier-qualifier-list before ‘acpi_integer’
          include/acpi/processor.h:168: error: expected specifier-qualifier-list before ‘acpi_handle’
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 8c91d958246bde68db0c3f0c57b535962ce861cb
      Author: Adrian Bunk <bunk@stusta.de>
      Date:   Tue Mar 6 02:29:40 2007 -0800
      
          cpuidle: make code static
      
          This patch makes the following needlessly global code static:
          - driver.c: __cpuidle_find_driver()
          - governor.c: __cpuidle_find_governor()
          - ladder.c: struct ladder_governor
      Signed-off-by: Adrian Bunk's avatarAdrian Bunk <bunk@stusta.de>
          Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
          Cc: Adam Belay <abelay@novell.com>
          Cc: Shaohua Li <shaohua.li@intel.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 0c39dc3187094c72c33ab65a64d2017b21f372d2
      Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Wed Mar 7 02:38:22 2007 -0500
      
          cpu_idle: fix build break
      
          This patch fixes a build breakage with !CONFIG_HOTPLUG_CPU and
          CONFIG_CPU_IDLE.
      Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: Adrian Bunk's avatarAdrian Bunk <bunk@stusta.de>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 8112e3b115659b07df340ef170515799c0105f82
      Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Tue Mar 6 02:29:39 2007 -0800
      
          cpuidle: build fix for !CPU_IDLE
      
          Fix the compile issues when CPU_IDLE is not configured.
      Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
          Cc: Adam Belay <abelay@novell.com>
          Cc: Shaohua Li <shaohua.li@intel.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 1eb4431e9599cd25e0d9872f3c2c8986821839dd
      Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Thu Feb 22 13:54:57 2007 -0800
      
          cpuidle take2: Basic documentation for cpuidle
      
          Documentation for cpuidle infrastructure
      Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarAdam Belay <abelay@novell.com>
      Signed-off-by: default avatarShaohua Li <shaohua.li@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit ef5f15a8b79123a047285ec2e3899108661df779
      Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Thu Feb 22 13:54:03 2007 -0800
      
          cpuidle take2: Hookup ACPI C-states driver with cpuidle
      
          Hookup ACPI C-states onto generic cpuidle infrastructure.
      
          drivers/acpi/procesor_idle.c is now a ACPI C-states driver that registers as
          a driver in cpuidle infrastructure and the policy part is removed from
          drivers/acpi/processor_idle.c. We use governor in cpuidle instead.
      Signed-off-by: default avatarShaohua Li <shaohua.li@intel.com>
      Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarAdam Belay <abelay@novell.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      
      commit 987196fa82d4db52c407e8c9d5dec884ba602183
      Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Date:   Thu Feb 22 13:52:57 2007 -0800
      
          cpuidle take2: Core cpuidle infrastructure
      
          Announcing 'cpuidle', a new CPU power management infrastructure to manage
          idle CPUs in a clean and efficient manner.
          cpuidle separates out the drivers that can provide support for multiple types
          of idle states and policy governors that decide on what idle state to use
          at run time.
          A cpuidle driver can support multiple idle states based on parameters like
          varying power consumption, wakeup latency, etc (ACPI C-states for example).
          A cpuidle governor can be usage model specific (laptop, server,
          laptop on battery etc).
          Main advantage of the infrastructure being, it allows independent development
          of drivers and governors and allows for better CPU power management.
      
          A huge thanks to Adam Belay and Shaohua Li who were part of this mini-project
          since its beginning and are greatly responsible for this patchset.
      
          This patch:
      
          Core cpuidle infrastructure.
          Introduces a new abstraction layer for cpuidle:
          * which manages drivers that can support multiple idles states. Drivers
            can be generic or particular to specific hardware/platform
          * allows pluging in multiple policy governors that can take idle state policy
            decision
          * The core also has a set of sysfs interfaces with which administrato can know
            about supported drivers and governors and switch them at run time.
      Signed-off-by: default avatarAdam Belay <abelay@novell.com>
      Signed-off-by: default avatarShaohua Li <shaohua.li@intel.com>
      Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      4f86d3a8
  24. 23 Sep, 2007 1 commit
    • Thomas Gleixner's avatar
      ACPI: disable lower idle C-states across suspend/resume · b04e7bdb
      Thomas Gleixner authored
      device_suspend() calls ACPI suspend functions, which seems to have undesired
      side effects on lower idle C-states. It took me some time to realize that
      especially the VAIO BIOSes (both Andrews jinxed UP and my elfstruck SMP one)
      show this effect. I'm quite sure that other bug reports against suspend/resume
      about turning the system into a brick have the same root cause.
      
      After fishing in the dark for quite some time, I realized that removing the ACPI
      processor module before suspend (this removes the lower C-state functionality)
      made the problem disappear. Interestingly enough the propability of having a
      bricked box is influenced by various factors (interrupts, size of the ram image,
      ...). Even adding a bunch of printks in the wrong places made the problem go
      away. The previous periodic tick implementation simply pampered over the
      problem, which explains why the dyntick / clockevents changes made this more
      prominent.
      
      We avoid complex functionality during the boot process and we have to do the
      same during suspend/resume. It is a similar scenario and equaly fragile.
      
      Add suspend / resume functions to the ACPI processor code and disable the lower
      idle C-states across suspend/resume. Fall back to the default idle
      implementation (halt) instead.
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Tested-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Cc: Len Brown <lenb@kernel.org>
      Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Cc: Rafael J. Wysocki <rjw@sisk.pl>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      b04e7bdb
  25. 07 Aug, 2007 1 commit
  26. 02 Jun, 2007 2 commits
  27. 10 May, 2007 1 commit
  28. 16 Feb, 2007 1 commit
  29. 14 Oct, 2006 1 commit
  30. 28 Jun, 2006 1 commit
  31. 26 Apr, 2006 1 commit
  32. 09 Feb, 2006 1 commit
  33. 08 Jan, 2006 1 commit