From: Jan Kara Date: Tue, 29 Apr 2008 07:59:39 +0000 (-0700) Subject: vfs: skip inodes without pages to free in drop_pagecache_sb() X-Git-Tag: v2.6.26-rc1~611 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=af065b8a19041554196971d8b6ae1459798d3b14;p=linux-2.6-omap-h63xx.git 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 Cc: Fengguang Wu Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/fs/drop_caches.c b/fs/drop_caches.c index 50f9087635d..3e5637fc377 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);