From b17621fed6aa039387e35f9b4d34d98f213e5673 Mon Sep 17 00:00:00 2001
From: Wu Fengguang <fengguang.wu@gmail.com>
Date: Thu, 3 Dec 2009 13:54:25 +0100
Subject: 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>
---
include/linux/writeback.h | 1 +
1 file changed, 1 insertion(+)
(limited to 'include/linux')
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 */
--
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