linux-kernel - Re: [PATCH] virtio-blk: make the queue depth configurable

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 14 Mar 2014 10:38:40 -0700
From:	Joe Perches <joe@...ches.com>
To:	Theodore Ts'o <tytso@....edu>
Cc:	Linux Kernel Developers List <linux-kernel@...r.kernel.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	virtio-dev@...ts.oasis-open.org,
	virtualization@...ts.linux-foundation.org, fes@...gle.com
Subject: Re: [PATCH] virtio-blk: make the queue depth configurable

On Fri, 2014-03-14 at 13:31 -0400, Theodore Ts'o wrote:
> The current virtio block sets a queue depth of 64.  With a
> sufficiently fast device, using a queue depth of 256 can double the
> IOPS which can be sustained.  So make the queue depth something which
> can be set at module load time or via a kernel boot-time parameter.
[]
> diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
[]
> @@ -481,6 +481,9 @@ static struct blk_mq_ops virtio_mq_ops = {
>  	.free_hctx	= blk_mq_free_single_hw_queue,
>  };
>  
> +static int queue_depth = 64;
> +module_param(queue_depth, int, 444);

444?  Really Ted?

0444



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/