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| author |   Jan Kara <jack@suse.cz> | 2008-04-29 00:59:39 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-29 08:06:05 -0700 |
| commit | af065b8a19041554196971d8b6ae1459798d3b14 (patch) | |
| tree | 33bfa04388cecfc50dda596302c3a5c91d0e2b64 /fs | |
| parent | vfs: fix lock inversion in drop_pagecache_sb() (diff) | |
| download | linux-dev-af065b8a19041554196971d8b6ae1459798d3b14.tar.xz linux-dev-af065b8a19041554196971d8b6ae1459798d3b14.zip | |
vfs: skip inodes without pages to free in drop_pagecache_sb()
Many inodes have no pagecache, so we can avoid lots of lock-takings.
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Fengguang Wu <wfg@mail.ustc.edu.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/drop_caches.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/drop_caches.c b/fs/drop_caches.c index 50f9087635d8..3e5637fc3779 100644 --- a/fs/drop_caches.c +++ b/fs/drop_caches.c @@ -20,6 +20,8 @@ static void drop_pagecache_sb(struct super_block *sb) list_for_each_entry(inode, &sb->s_inodes, i_sb_list) { if (inode->i_state & (I_FREEING|I_WILL_FREE)) continue; + if (inode->i_mapping->nrpages == 0) + continue; __iget(inode); spin_unlock(&inode_lock); __invalidate_mapping_pages(inode->i_mapping, 0, -1, true); |