17 Jul, 2007

1 commit

• fc9a07e7b   invalidate_mapping_pages(): add cond_resched ... Browse Code »

  invalidate_mapping_pages() can sometimes take a long time (millions of pages
  to free). Long enough for the softlockup detector to trigger.

  We used to have a cond_resched() in there but I took it out because the
  drop_caches code calls invalidate_mapping_pages() under inode_lock.

  The patch adds a nasty flag and puts the cond_resched() back.

  Signed-off-by: Andrew Morton
  Signed-off-by: Linus Torvalds

  Andrew Morton

  2007-07-17 00:05:36 +0800  

12 Feb, 2007

1 commit

• fc0ecff69   [PATCH] remove invalidate_inode_pages() ... Browse Code »

  Convert all calls to invalidate_inode_pages() into open-coded calls to
  invalidate_mapping_pages().

  Leave the invalidate_inode_pages() wrapper in place for now, marked as
  deprecated.

  Signed-off-by: Andrew Morton
  Signed-off-by: Linus Torvalds

  Andrew Morton

  2007-02-12 02:51:31 +0800  

09 Jan, 2006

1 commit

• 9d0243bca   [PATCH] drop-pagecache ... Browse Code »

  Add /proc/sys/vm/drop_caches. When written to, this will cause the kernel to
  discard as much pagecache and/or reclaimable slab objects as it can. THis
  operation requires root permissions.

  It won't drop dirty data, so the user should run `sync' first.

  Caveats:

  a) Holds inode_lock for exorbitant amounts of time.

  b) Needs to be taught about NUMA nodes: propagate these all the way through
  so the discarding can be controlled on a per-node basis.

  This is a debugging feature: useful for getting consistent results between
  filesystem benchmarks. We could possibly put it under a config option, but
  it's less than 300 bytes.

  Signed-off-by: Andrew Morton
  Signed-off-by: Linus Torvalds

  Andrew Morton

  2006-01-09 12:12:40 +0800