1. 26 Jul, 2011 1 commit
  2. 02 May, 2009 1 commit
    • KOSAKI Motohiro's avatar
      mm: fix Committed_AS underflow on large NR_CPUS environment · 00a62ce9
      KOSAKI Motohiro authored
      The Committed_AS field can underflow in certain situations:
      
      >         # while true; do cat /proc/meminfo  | grep _AS; sleep 1; done | uniq -c
      >               1 Committed_AS: 18446744073709323392 kB
      >              11 Committed_AS: 18446744073709455488 kB
      >               6 Committed_AS:    35136 kB
      >               5 Committed_AS: 18446744073709454400 kB
      >               7 Committed_AS:    35904 kB
      >               3 Committed_AS: 18446744073709453248 kB
      >               2 Committed_AS:    34752 kB
      >               9 Committed_AS: 18446744073709453248 kB
      >               8 Committed_AS:    34752 kB
      >               3 Committed_AS: 18446744073709320960 kB
      >               7 Committed_AS: 18446744073709454080 kB
      >               3 Committed_AS: 18446744073709320960 kB
      >               5 Committed_AS: 18446744073709454080 kB
      >               6 Committed_AS: 18446744073709320960 kB
      
      Because NR_CPUS can be greater than 1000 and meminfo_proc_show() does
      not check for underflow.
      
      But NR_CPUS proportional isn't good calculation.  In general,
      possibility of lock contention is proportional to the number of online
      cpus, not theorical maximum cpus (NR_CPUS).
      
      The current kernel has generic percpu-counter stuff.  using it is right
      way.  it makes code simplify and percpu_counter_read_positive() don't
      make underflow issue.
      Reported-by: default avatarDave Hansen <dave@linux.vnet.ibm.com>
      Signed-off-by: default avatarKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
      Cc: Eric B Munson <ebmunson@us.ibm.com>
      Cc: Mel Gorman <mel@csn.ul.ie>
      Cc: Christoph Lameter <cl@linux-foundation.org>
      Cc: <stable@kernel.org>		[All kernel versions]
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      00a62ce9
  3. 09 Jul, 2008 1 commit
  4. 24 May, 2008 1 commit
  5. 26 Apr, 2006 1 commit
  6. 25 Apr, 2006 1 commit
  7. 16 Apr, 2005 1 commit
    • Linus Torvalds's avatar
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds authored
      Initial git repository build. I'm not bothering with the full history,
      even though we have it. We can create a separate "historical" git
      archive of that later if we want to, and in the meantime it's about
      3.2GB when imported into git - space that would just make the early
      git days unnecessarily complicated, when we don't have a lot of good
      infrastructure for it.
      
      Let it rip!
      1da177e4