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authorAndrew Morton <akpm@linux-foundation.org>2010-10-26 14:22:05 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-26 16:52:10 -0700
commit74ce002d9aee23031b4967e1dd1c1966ddc60749 (patch)
tree797e998b3c8661d8e6884de4228928d6cda74047
parent16b56cf4b8a0fa9acc21bd2ad19839b917999b96 (diff)
downloadvexpress-lsk-74ce002d9aee23031b4967e1dd1c1966ddc60749.tar.gz
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>
-rw-r--r--fs/fs-writeback.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 97d2951bd4d..b5aae4bd0ac 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);