diff options
| author | Wu Fengguang <fengguang.wu@gmail.com> | 2009-12-03 13:54:25 +0100 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-12-03 13:54:25 +0100 |
| commit | b17621fed6aa039387e35f9b4d34d98f213e5673 (patch) | |
| tree | bc755d1aa204518600a6d82dd51d970c685dc68c | |
| parent | 951c30d135390a108f102b0f6e3cfa6241f2a1aa (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>
| -rw-r--r-- | fs/fs-writeback.c | 1 | ||||
| -rw-r--r-- | fs/nfs/write.c | 2 | ||||
| -rw-r--r-- | include/linux/writeback.h | 1 |
3 files changed, 3 insertions, 1 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 0306c8e7d6b5..0793961f7699 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -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; diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 53eb26c16b50..c84b5cc1a943 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -178,7 +178,7 @@ static int wb_priority(struct writeback_control *wbc) { if (wbc->for_reclaim) return FLUSH_HIGHPRI | FLUSH_STABLE; - if (wbc->for_kupdate) + if (wbc->for_kupdate || wbc->for_background) return FLUSH_LOWPRI; return 0; } 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 */ |