Commit 89b90be2 authored Jan 03, 2011 by Tejun Heo Committed by Jens Axboe Jan 03, 2011

block: make kblockd_workqueue smarter



kblockd is used for unplugging and may affect IO latency and
throughput and the max number of concurrent work items are bound by
the number of block devices.  Make it HIGHPRI workqueue w/ default max
concurrency.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

parent 27667c99

block/blk-core.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -2606,7 +2606,9 @@ int __init blk_dev_init(void)
		BUILD_BUG_ON(__REQ_NR_BITS > 8 *
		sizeof(((struct request *)0)->cmd_flags));

		kblockd_workqueue = create_workqueue("kblockd");
		/* used for unplugging and affects IO latency/throughput - HIGHPRI */
		kblockd_workqueue = alloc_workqueue("kblockd",
		WQ_MEM_RECLAIM \| WQ_HIGHPRI, 0);
		if (!kblockd_workqueue)
		panic("Failed to create kblockd\n");