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| author | Dave Chinner <dchinner@redhat.com> | 2010-10-23 13:03:02 +0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2010-10-26 05:26:09 +0400 |
| commit | cffbc8aa334f55c9ed42d25202eb3ebf3a97c195 (patch) | |
| tree | dab046695754e2cec1a7ab7a64b236e976d94360 /fs/internal.h | |
| parent | be1a16a0ae29a7c90081a657b64aa51cb1a65a27 (diff) | |
| download | linux-cffbc8aa334f55c9ed42d25202eb3ebf3a97c195.tar.xz | |
fs: Convert nr_inodes and nr_unused to per-cpu counters
The number of inodes allocated does not need to be tied to the
addition or removal of an inode to/from a list. If we are not tied
to a list lock, we could update the counters when inodes are
initialised or destroyed, but to do that we need to convert the
counters to be per-cpu (i.e. independent of a lock). This means that
we have the freedom to change the list/locking implementation
without needing to care about the counters.
Based on a patch originally from Eric Dumazet.
[AV: cleaned up a bit, fixed build breakage on weird configs
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/internal.h')
| -rw-r--r-- | fs/internal.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/internal.h b/fs/internal.h index f6dce46d80dc..4cc67eb6ed56 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -105,4 +105,5 @@ extern void release_open_intent(struct nameidata *); /* * inode.c */ +extern int get_nr_dirty_inodes(void); extern int invalidate_inodes(struct super_block *); |