From: Andrew Morton <akpm@linux-foundation.org>
Date: Tue, 26 Oct 2010 21:22:05 +0000 (-0700)
Subject: fs/fs-writeback.c: restore lost comment
X-Git-Tag: v2.6.37-rc1~105^2~110
X-Git-Url: http://git.cascardo.info/?a=commitdiff_plain;h=74ce002d9aee23031b4967e1dd1c1966ddc60749;p=cascardo%2Flinux.git

fs/fs-writeback.c: restore lost comment

I had to go back to a 2.6.20 tree to work out why we're adding a
number-of-inodes into a number-of-pages count.  Restore the lost comment.

Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 97d2951bd4d1..b5aae4bd0aca 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -721,6 +721,10 @@ static long wb_check_old_data_flush(struct bdi_writeback *wb)
 		return 0;
 
 	wb->last_old_flush = jiffies;
+	/*
+	 * Add in the number of potentially dirty inodes, because each inode
+	 * write can dirty pagecache in the underlying blockdev.
+	 */
 	nr_pages = global_page_state(NR_FILE_DIRTY) +
 			global_page_state(NR_UNSTABLE_NFS) +
 			(inodes_stat.nr_inodes - inodes_stat.nr_unused);