1. 20 Apr, 2017 1 commit
  2. 06 Jan, 2017 1 commit
  3. 20 Jan, 2015 1 commit
  4. 27 Sep, 2013 1 commit
    • David Howells's avatar
      FS-Cache: Provide the ability to enable/disable cookies · 94d30ae9
      David Howells authored
      Provide the ability to enable and disable fscache cookies.  A disabled cookie
      will reject or ignore further requests to:
      
      	Acquire a child cookie
      	Invalidate and update backing objects
      	Check the consistency of a backing object
      	Allocate storage for backing page
      	Read backing pages
      	Write to backing pages
      
      but still allows:
      
      	Checks/waits on the completion of already in-progress objects
      	Uncaching of pages
      	Relinquishment of cookies
      
      Two new operations are provided:
      
       (1) Disable a cookie:
      
      	void fscache_disable_cookie(struct fscache_cookie *cookie,
      				    bool invalidate);
      
           If the cookie is not already disabled, this locks the cookie against other
           dis/enablement ops, marks the cookie as being disabled, discards or
           invalidates any backing objects and waits for cessation of activity on any
           associated object.
      
           This is a wrapper around a chunk split out of fscache_relinquish_cookie(),
           but it reinitialises the cookie such that it can be reenabled.
      
           All possible failures are handled internally.  The caller should consider
           calling fscache_uncache_all_inode_pages() afterwards to make sure all page
           markings are cleared up.
      
       (2) Enable a cookie:
      
      	void fscache_enable_cookie(struct fscache_cookie *cookie,
      				   bool (*can_enable)(void *data),
      				   void *data)
      
           If the cookie is not already enabled, this locks the cookie against other
           dis/enablement ops, invokes can_enable() and, if the cookie is not an
           index cookie, will begin the procedure of acquiring backing objects.
      
           The optional can_enable() function is passed the data argument and returns
           a ruling as to whether or not enablement should actually be permitted to
           begin.
      
           All possible failures are handled internally.  The cookie will only be
           marked as enabled if provisional backing objects are allocated.
      
      A later patch will introduce these to NFS.  Cookie enablement during nfs_open()
      is then contingent on i_writecount <= 0.  can_enable() checks for a race
      between open(O_RDONLY) and open(O_WRONLY/O_RDWR).  This simplifies NFS's cookie
      handling and allows us to get rid of open(O_RDONLY) accidentally introducing
      caching to an inode that's open for writing already.
      
      One operation has its API modified:
      
       (3) Acquire a cookie.
      
      	struct fscache_cookie *fscache_acquire_cookie(
      		struct fscache_cookie *parent,
      		const struct fscache_cookie_def *def,
      		void *netfs_data,
      		bool enable);
      
           This now has an additional argument that indicates whether the requested
           cookie should be enabled by default.  It doesn't need the can_enable()
           function because the caller must prevent multiple calls for the same netfs
           object and it doesn't need to take the enablement lock because no one else
           can get at the cookie before this returns.
      
      Signed-off-by: David Howells <dhowells@redhat.com
      94d30ae9
  5. 22 Apr, 2010 1 commit
  6. 03 Apr, 2009 1 commit
  7. 21 May, 2007 1 commit
    • Alexey Dobriyan's avatar
      Detach sched.h from mm.h · e8edc6e0
      Alexey Dobriyan authored
      First thing mm.h does is including sched.h solely for can_do_mlock() inline
      function which has "current" dereference inside. By dealing with can_do_mlock()
      mm.h can be detached from sched.h which is good. See below, why.
      
      This patch
      a) removes unconditional inclusion of sched.h from mm.h
      b) makes can_do_mlock() normal function in mm/mlock.c
      c) exports can_do_mlock() to not break compilation
      d) adds sched.h inclusions back to files that were getting it indirectly.
      e) adds less bloated headers to some files (asm/signal.h, jiffies.h) that were
         getting them indirectly
      
      Net result is:
      a) mm.h users would get less code to open, read, preprocess, parse, ... if
         they don't need sched.h
      b) sched.h stops being dependency for significant number of files:
         on x86_64 allmodconfig touching sched.h results in recompile of 4083 files,
         after patch it's only 3744 (-8.3%).
      
      Cross-compile tested on
      
      	all arm defconfigs, all mips defconfigs, all powerpc defconfigs,
      	alpha alpha-up
      	arm
      	i386 i386-up i386-defconfig i386-allnoconfig
      	ia64 ia64-up
      	m68k
      	mips
      	parisc parisc-up
      	powerpc powerpc-up
      	s390 s390-up
      	sparc sparc-up
      	sparc64 sparc64-up
      	um-x86_64
      	x86_64 x86_64-up x86_64-defconfig x86_64-allnoconfig
      
      as well as my two usual configs.
      Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      e8edc6e0
  8. 26 Apr, 2007 4 commits
  9. 27 Sep, 2006 1 commit
  10. 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