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authorWu Fengguang <fengguang.wu@intel.com>2010-08-11 17:17:42 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-12 11:43:30 -0400
commit4ea879b96d437693485d21f4b7e1eb72f7615fc2 (patch)
tree142899843f2ce27334dbd134cd1bab3058cc8028 /fs
parent23539afc71937dbaca7de2229669f4475ff4ea7b (diff)
writeback: fix queue_io() ordering
This was not a bug, since b_io is empty for kupdate writeback. The next patch will do requeue_io() for non-kupdate writeback, so let's fix it. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Cc: Dave Chinner <david@fromorbit.com> Cc: Martin Bligh <mbligh@google.com> Cc: Michael Rubin <mrubin@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Christoph Hellwig <hch@infradead.org> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/fs-writeback.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 1ce364bbb003..863bfb0eb492 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -249,10 +249,18 @@ static void move_expired_inodes(struct list_head *delaying_queue,
249 249
250/* 250/*
251 * Queue all expired dirty inodes for io, eldest first. 251 * Queue all expired dirty inodes for io, eldest first.
252 * Before
253 * newly dirtied b_dirty b_io b_more_io
254 * =============> gf edc BA
255 * After
256 * newly dirtied b_dirty b_io b_more_io
257 * =============> g fBAedc
258 * |
259 * +--> dequeue for IO
252 */ 260 */
253static void queue_io(struct bdi_writeback *wb, unsigned long *older_than_this) 261static void queue_io(struct bdi_writeback *wb, unsigned long *older_than_this)
254{ 262{
255 list_splice_init(&wb->b_more_io, wb->b_io.prev); 263 list_splice_init(&wb->b_more_io, &wb->b_io);
256 move_expired_inodes(&wb->b_dirty, &wb->b_io, older_than_this); 264 move_expired_inodes(&wb->b_dirty, &wb->b_io, older_than_this);
257} 265}
258 266