linux-kernel - [PATCH 3/8] writeback: mark background writeback as such

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Date:   Tue, 1 Nov 2016 15:08:46 -0600
From:   Jens Axboe <axboe@...com>
To:     <axboe@...nel.dk>, <linux-kernel@...r.kernel.org>,
        <linux-fsdevel@...r.kernel.org>, <linux-block@...r.kernel.org>
CC:     <jack@...e.cz>, <hch@....de>, Jens Axboe <axboe@...com>
Subject: [PATCH 3/8] writeback: mark background writeback as such

If we're doing background type writes, then use the appropriate
background write flags for that.

Signed-off-by: Jens Axboe <axboe@...com>
---
 include/linux/writeback.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 50c96ee8108f..c78f9f0920b5 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -107,6 +107,8 @@ static inline int wbc_to_write_flags(struct writeback_control *wbc)
 {
 	if (wbc->sync_mode == WB_SYNC_ALL)
 		return REQ_SYNC;
+	else if (wbc->for_kupdate || wbc->for_background)
+		return REQ_BACKGROUND;
 
 	return 0;
 }
-- 
2.7.4