tree 8271f6d2008405bd392893ab0f7a4bd25653dc90
parent 6585027a5e8cb490e3a761b2f3f3c3acf722aff2
author Wu Fengguang <fengguang.wu@intel.com> 1294962346 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1294968752 -0800

writeback: trace wakeup event for background writeback

This tracks when balance_dirty_pages() tries to wakeup the flusher thread
for background writeback (if it was not started already).

Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jan Engelhardt <jengelh@medozas.de>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>