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Commit af065b8a authored by Jan Kara's avatar Jan Kara Committed by Linus Torvalds
Browse files

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: default avatarJan Kara <jack@suse.cz>
Cc: Fengguang Wu <wfg@mail.ustc.edu.cn>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent eccb95ce

fs/drop_caches.c

+2 −0
Original line number Diff line number Diff line
@@ -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);