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authorWu Fengguang <fengguang.wu@intel.com>2011-01-13 15:45:46 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-13 17:32:32 -0800
commit71927e84e0aebfbe5a91565c3b207af25a4e9162 (patch)
tree8271f6d2008405bd392893ab0f7a4bd25653dc90 /include/trace
parent6585027a5e8cb490e3a761b2f3f3c3acf722aff2 (diff)
downloadop-kernel-dev-71927e84e0aebfbe5a91565c3b207af25a4e9162.zip
op-kernel-dev-71927e84e0aebfbe5a91565c3b207af25a4e9162.tar.gz
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>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/writeback.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h
index 89a2b2d..4e249b9 100644
--- a/include/trace/events/writeback.h
+++ b/include/trace/events/writeback.h
@@ -81,6 +81,7 @@ DEFINE_EVENT(writeback_class, name, \
TP_ARGS(bdi))
DEFINE_WRITEBACK_EVENT(writeback_nowork);
+DEFINE_WRITEBACK_EVENT(writeback_wake_background);
DEFINE_WRITEBACK_EVENT(writeback_wake_thread);
DEFINE_WRITEBACK_EVENT(writeback_wake_forker_thread);
DEFINE_WRITEBACK_EVENT(writeback_bdi_register);
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