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authorWu Fengguang <fengguang.wu@gmail.com>2009-12-03 13:54:25 +0100
committerJens Axboe <jens.axboe@oracle.com>2009-12-03 13:54:25 +0100
commitb17621fed6aa039387e35f9b4d34d98f213e5673 (patch)
treebc755d1aa204518600a6d82dd51d970c685dc68c /include/linux/writeback.h
parent951c30d135390a108f102b0f6e3cfa6241f2a1aa (diff)
writeback: introduce wbc.for_background
It will lower the flush priority for NFS, and maybe more in future. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux/writeback.h')
-rw-r--r--include/linux/writeback.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 66ebddcff664..705f01fe413a 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -49,6 +49,7 @@ struct writeback_control {
unsigned nonblocking:1; /* Don't get stuck on request queues */
unsigned encountered_congestion:1; /* An output: a queue is full */
unsigned for_kupdate:1; /* A kupdate writeback */
+ unsigned for_background:1; /* A background writeback */
unsigned for_reclaim:1; /* Invoked from the page allocator */
unsigned range_cyclic:1; /* range_start is cyclic */
unsigned more_io:1; /* more io to be dispatched */