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| author | Tejun Heo <tj@kernel.org> | 2013-04-01 19:08:06 -0700 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2013-04-01 19:08:06 -0700 |
| commit | b5c872ddb7083c7909fb76a170c3807e04564bb3 (patch) | |
| tree | 6daa0f960c87f799ca35a9d87e5c24fccc07ecab /mm/backing-dev.c | |
| parent | 839a8e8660b6777e7fe4e80af1a048aebe2b5977 (diff) | |
| download | lwn-b5c872ddb7083c7909fb76a170c3807e04564bb3.tar.gz lwn-b5c872ddb7083c7909fb76a170c3807e04564bb3.zip | |
writeback: expose the bdi_wq workqueue
There are cases where userland wants to tweak the priority and
affinity of writeback flushers. Expose bdi_wq to userland by setting
WQ_SYSFS. It appears under /sys/bus/workqueue/devices/writeback/ and
allows adjusting maximum concurrency level, cpumask and nice level.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/backing-dev.c')
| -rw-r--r-- | mm/backing-dev.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 2857d4f6bca4..502517492258 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -259,7 +259,7 @@ static int __init default_bdi_init(void) int err; bdi_wq = alloc_workqueue("writeback", WQ_MEM_RECLAIM | WQ_FREEZABLE | - WQ_UNBOUND, 0); + WQ_UNBOUND | WQ_SYSFS, 0); if (!bdi_wq) return -ENOMEM; |