linux-kernel - Re: [PATCH] virtio-blk: make the queue depth the max supportable by the hypervisor

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Date:	Tue, 25 Mar 2014 11:50:55 -0700
From:	Venkatesh Srinivas <venkateshs@...gle.com>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	"Theodore Ts'o" <tytso@....edu>,
	Linux Kernel Developers List <linux-kernel@...r.kernel.org>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH] virtio-blk: make the queue depth the max supportable by
 the hypervisor

On Wed, Mar 19, 2014 at 10:48 AM, Venkatesh Srinivas
<venkateshs@...gle.com> wrote:
>> And I rewrote it substantially, mainly to take
>> VIRTIO_RING_F_INDIRECT_DESC into account.
>>
>> As QEMU sets the vq size for PCI to 128, Venkatash's patch wouldn't
>> have made a change.  This version does (since QEMU also offers
>> VIRTIO_RING_F_INDIRECT_DESC.
>
> That divide-by-2 produced the same queue depth as the prior
> computation in QEMU was deliberate -- but raising it to 128 seems
> pretty reasonable.
>
> Signed-off-by: Venkatesh Srinivas <venkateshs@...gle.com>

Soft ping about this patch.

Thanks,
-- vs;
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