[0/2] vhost-scsi: Support worker ioctls

Message ID	20231114003644.7026-1-michael.christie@oracle.com
Headers	show Return-Path: <qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org> From: Mike Christie <michael.christie@oracle.com> To: fam@euphon.net, stefanha@redhat.com, jasowang@redhat.com, mst@redhat.com, sgarzare@redhat.com, pbonzini@redhat.com, qemu-devel@nongnu.org Subject: [PATCH 0/2] vhost-scsi: Support worker ioctls Date: Mon, 13 Nov 2023 18:36:42 -0600 Message-Id: <20231114003644.7026-1-michael.christie@oracle.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain MIME-Version: 1.0 Received-SPF: pass client-ip=205.220.165.32; envelope-from=michael.christie@oracle.com; helo=mx0a-00069f02.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action Precedence: list Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org
Series	vhost-scsi: Support worker ioctls \| expand [0/2] vhost-scsi: Support worker ioctls [1/2] vhost: Add worker backend callouts [2/2] vhost-scsi: Add support for a worker thread per virtqueue

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From: Mike Christie <michael.christie@oracle.com>
To: fam@euphon.net, stefanha@redhat.com, jasowang@redhat.com, mst@redhat.com,
 sgarzare@redhat.com, pbonzini@redhat.com, qemu-devel@nongnu.org
Subject: [PATCH 0/2] vhost-scsi: Support worker ioctls
Date: Mon, 13 Nov 2023 18:36:42 -0600
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Series

vhost-scsi: Support worker ioctls | expand

Message

Mike Christie Nov. 14, 2023, 12:36 a.m. UTC

The following patches allow users to configure the vhost worker threads
for vhost-scsi. With vhost-net we get a worker thread per rx/tx virtqueue
pair, but for vhost-scsi we get one worker for all workqueues. This
becomes a bottlneck after 2 queues are used.

In the upstream linux kernel commit:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/vhost/vhost.c?id=c1ecd8e9500797748ae4f79657971955d452d69d

we enabled the vhost layer to be able to create a worker thread and
attach it to a virtqueue.

This patchset adds support to vhost-scsi to use these ioctls so we are
no longer limited to the single worker.