From: "Michael S. Tsirkin" <mst@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org,
kvm@vger.kernel.org, rusty@rustcorp.com.au, jasowang@redhat.com,
virtualization@lists.linux-foundation.org
Subject: Re: [PATCH 5/5] virtio-scsi: introduce multiqueue support
Date: Tue, 4 Sep 2012 17:47:54 +0300 [thread overview]
Message-ID: <20120904144754.GO9805@redhat.com> (raw)
In-Reply-To: <1346154857-12487-6-git-send-email-pbonzini@redhat.com>
On Tue, Aug 28, 2012 at 01:54:17PM +0200, Paolo Bonzini wrote:
> @@ -575,15 +630,19 @@ static struct scsi_host_template virtscsi_host_template = {
> &__val, sizeof(__val)); \
> })
>
> +
Pls don't add empty lines.
> static void virtscsi_init_vq(struct virtio_scsi_vq *virtscsi_vq,
> - struct virtqueue *vq)
> + struct virtqueue *vq, bool affinity)
> {
> spin_lock_init(&virtscsi_vq->vq_lock);
> virtscsi_vq->vq = vq;
> + if (affinity)
> + virtqueue_set_affinity(vq, virtqueue_get_queue_index(vq) -
> + VIRTIO_SCSI_VQ_BASE);
> }
>
This means in practice if you have less virtqueues than CPUs,
things are not going to work well, will they?
Any idea what to do?
--
MST
WARNING: multiple messages have this Message-ID (diff)
From: "Michael S. Tsirkin" <mst@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org, linux-scsi@vger.kernel.org,
linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org
Subject: Re: [PATCH 5/5] virtio-scsi: introduce multiqueue support
Date: Tue, 4 Sep 2012 17:47:54 +0300 [thread overview]
Message-ID: <20120904144754.GO9805@redhat.com> (raw)
In-Reply-To: <1346154857-12487-6-git-send-email-pbonzini@redhat.com>
On Tue, Aug 28, 2012 at 01:54:17PM +0200, Paolo Bonzini wrote:
> @@ -575,15 +630,19 @@ static struct scsi_host_template virtscsi_host_template = {
> &__val, sizeof(__val)); \
> })
>
> +
Pls don't add empty lines.
> static void virtscsi_init_vq(struct virtio_scsi_vq *virtscsi_vq,
> - struct virtqueue *vq)
> + struct virtqueue *vq, bool affinity)
> {
> spin_lock_init(&virtscsi_vq->vq_lock);
> virtscsi_vq->vq = vq;
> + if (affinity)
> + virtqueue_set_affinity(vq, virtqueue_get_queue_index(vq) -
> + VIRTIO_SCSI_VQ_BASE);
> }
>
This means in practice if you have less virtqueues than CPUs,
things are not going to work well, will they?
Any idea what to do?
--
MST
next prev parent reply other threads:[~2012-09-04 14:46 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-28 11:54 [PATCH 0/5] Multiqueue virtio-scsi Paolo Bonzini
2012-08-28 11:54 ` Paolo Bonzini
2012-08-28 11:54 ` [PATCH 1/5] virtio-ring: move queue_index to vring_virtqueue Paolo Bonzini
2012-08-28 11:54 ` Paolo Bonzini
2012-08-29 7:54 ` Jason Wang
2012-08-29 7:54 ` Jason Wang
2012-09-05 23:32 ` Rusty Russell
2012-09-05 23:32 ` Rusty Russell
2012-08-28 11:54 ` [PATCH 2/5] virtio: introduce an API to set affinity for a virtqueue Paolo Bonzini
2012-08-28 11:54 ` Paolo Bonzini
2012-09-05 23:32 ` Rusty Russell
2012-09-05 23:32 ` Rusty Russell
2012-08-28 11:54 ` [PATCH 3/5] virtio-scsi: allocate target pointers in a separate memory block Paolo Bonzini
2012-08-28 11:54 ` Paolo Bonzini
2012-08-28 14:07 ` Sasha Levin
2012-08-28 14:07 ` Sasha Levin
2012-08-28 14:25 ` Paolo Bonzini
2012-08-28 14:25 ` Paolo Bonzini
2012-08-28 11:54 ` [PATCH 4/5] virtio-scsi: pass struct virtio_scsi to virtqueue completion function Paolo Bonzini
2012-08-28 11:54 ` Paolo Bonzini
2012-08-28 11:54 ` [PATCH 5/5] virtio-scsi: introduce multiqueue support Paolo Bonzini
2012-08-28 11:54 ` Paolo Bonzini
2012-09-04 2:21 ` Nicholas A. Bellinger
2012-09-04 2:21 ` Nicholas A. Bellinger
2012-09-04 6:46 ` Paolo Bonzini
2012-09-04 6:46 ` Paolo Bonzini
2012-09-04 8:46 ` Michael S. Tsirkin
2012-09-04 8:46 ` Michael S. Tsirkin
2012-09-04 10:25 ` Paolo Bonzini
2012-09-04 10:25 ` Paolo Bonzini
2012-09-04 11:09 ` Michael S. Tsirkin
2012-09-04 11:09 ` Michael S. Tsirkin
2012-09-04 11:18 ` Paolo Bonzini
2012-09-04 11:18 ` Paolo Bonzini
2012-09-04 13:35 ` Michael S. Tsirkin
2012-09-04 13:35 ` Michael S. Tsirkin
2012-09-04 13:45 ` Paolo Bonzini
2012-09-04 13:45 ` Paolo Bonzini
2012-09-04 14:19 ` Michael S. Tsirkin
2012-09-04 14:19 ` Michael S. Tsirkin
2012-09-04 14:25 ` Paolo Bonzini
2012-09-04 14:25 ` Paolo Bonzini
2012-09-04 20:11 ` Nicholas A. Bellinger
2012-09-04 20:11 ` Nicholas A. Bellinger
2012-09-05 7:03 ` Paolo Bonzini
2012-09-05 7:03 ` Paolo Bonzini
2012-09-04 12:48 ` Michael S. Tsirkin
2012-09-04 12:48 ` Michael S. Tsirkin
2012-09-04 13:49 ` Paolo Bonzini
2012-09-04 13:49 ` Paolo Bonzini
2012-09-04 14:21 ` Michael S. Tsirkin
2012-09-04 14:21 ` Michael S. Tsirkin
2012-09-04 14:30 ` Paolo Bonzini
2012-09-04 14:30 ` Paolo Bonzini
2012-09-04 14:41 ` Michael S. Tsirkin
2012-09-04 14:41 ` Michael S. Tsirkin
2012-09-04 14:47 ` Michael S. Tsirkin [this message]
2012-09-04 14:47 ` Michael S. Tsirkin
2012-09-04 14:55 ` Paolo Bonzini
2012-09-04 14:55 ` Paolo Bonzini
2012-09-04 15:03 ` Michael S. Tsirkin
2012-09-04 15:03 ` Michael S. Tsirkin
2012-08-30 7:13 ` [PATCH 0/5] Multiqueue virtio-scsi Stefan Hajnoczi
2012-08-30 7:13 ` Stefan Hajnoczi
2012-08-30 14:53 ` Michael S. Tsirkin
2012-08-30 14:53 ` Michael S. Tsirkin
2012-08-30 15:45 ` Paolo Bonzini
2012-08-30 15:45 ` Paolo Bonzini
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20120904144754.GO9805@redhat.com \
--to=mst@redhat.com \
--cc=jasowang@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=pbonzini@redhat.com \
--cc=rusty@rustcorp.com.au \
--cc=virtualization@lists.linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.