linux-kernel - [PATCH] vfs: Skip inodes without pages to free in drop_pagecache

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Date:	Wed, 26 Mar 2008 10:33:21 +0100
From:	Jan Kara <jack@...e.cz>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Jan Kara <jack@...e.cz>, dgc@....com, wfg@...l.ustc.edu.cn,
	linux-kernel@...r.kernel.org
Subject: [PATCH] vfs: Skip inodes without pages to free in
	drop_pagecache_sb()


Signed-off-by: Jan Kara <jack@...e.cz>
CC: Fengguang Wu <wfg@...l.ustc.edu.cn>

---
 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 f5aae26..7327a42 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);
-- 
1.5.2.4

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