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writeback: introduce wbc.for_background

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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>
This commit is contained in:
Wu Fengguang 2009-12-03 13:54:25 +01:00 • committed by Jens Axboe
parent 951c30d135
commit b17621fed6
3 changed files with 3 additions and 1 deletions
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fs/fs-writeback.c
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@ -738,6 +738,7 @@ static long wb_writeback(struct bdi_writeback *wb,
.sync_mode = args->sync_mode,
.older_than_this = NULL,
.for_kupdate = args->for_kupdate,
.for_background = args->for_background,
.range_cyclic = args->range_cyclic,
};
unsigned long oldest_jif;