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 <[email protected]> Cc: Jens Axboe <[email protected]> Cc: Fengguang Wu <[email protected]> Cc: Jeff Moyer <[email protected]> Cc: Kay Sievers <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> --- mm/backing-dev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 2857d4f..5025174 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; -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
