path: root/mm/backing-dev.c
diff options
authorCurt Wohlgemuth <>2011-10-07 21:54:10 -0600
committerWu Fengguang <>2011-10-31 00:33:36 +0800
commit0e175a1835ffc979e55787774e58ec79e41957d7 (patch)
tree6ec4b65a8de4e9d1c12d26a1079079ed81d79450 /mm/backing-dev.c
parentad4e38dd6a33bb3a4882c487d7abe621e583b982 (diff)
writeback: Add a 'reason' to wb_writeback_work
This creates a new 'reason' field in a wb_writeback_work structure, which unambiguously identifies who initiates writeback activity. A 'wb_reason' enumeration has been added to writeback.h, to enumerate the possible reasons. The 'writeback_work_class' and tracepoint event class and 'writeback_queue_io' tracepoints are updated to include the symbolic 'reason' in all trace events. And the 'writeback_inodes_sbXXX' family of routines has had a wb_stats parameter added to them, so callers can specify why writeback is being started. Acked-by: Jan Kara <> Signed-off-by: Curt Wohlgemuth <> Signed-off-by: Wu Fengguang <>
Diffstat (limited to 'mm/backing-dev.c')
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 5dcaa3c756d1..dd8916feb05e 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -476,7 +476,8 @@ static int bdi_forker_thread(void *ptr)
* the bdi from the thread. Hopefully 1024 is
* large enough for efficient IO.
- writeback_inodes_wb(&bdi->wb, 1024);
+ writeback_inodes_wb(&bdi->wb, 1024,
} else {
* The spinlock makes sure we do not lose