From: Stefan Hajnoczi <stefanha@redhat.com>
To: Greg Kurz <groug@kaod.org>
Cc: Fam Zheng <fam@euphon.net>, Kevin Wolf <kwolf@redhat.com>,
qemu-block@nongnu.org, "Michael S. Tsirkin" <mst@redhat.com>,
qemu-devel@nongnu.org, Max Reitz <mreitz@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>,
David Gibson <david@gibson.dropbear.id.au>
Subject: Re: [RFC 2/8] virtio: Introduce virtio_bus_set_host_notifiers()
Date: Mon, 29 Mar 2021 18:06:55 +0100 [thread overview]
Message-ID: <YGIJLyhbhKQ5yNfO@stefanha-x1.localdomain> (raw)
In-Reply-To: <20210325150735.1098387-3-groug@kaod.org>
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On Thu, Mar 25, 2021 at 04:07:29PM +0100, Greg Kurz wrote:
> Multiqueue devices such as virtio-scsi or virtio-blk, all open-code the
> same pattern to setup/tear down host notifiers of the request virtqueues.
> Consolidate the pattern in a new virtio_bus_set_host_notifiers() API.
> Since virtio-scsi and virtio-blk both fallback to userspace if host
> notifiers can't be set, e.g. file descriptor exhaustion, go for a
> warning rather than an error. Also make it oneshot to avoid flooding
> the logs since the message would be very likely the same for all
> virtqueues.
>
> Devices will be converted to use virtio_bus_set_host_notifiers() in
> separate patches.
>
> Signed-off-by: Greg Kurz <groug@kaod.org>
> ---
> include/hw/virtio/virtio-bus.h | 3 +++
> hw/virtio/virtio-bus.c | 36 ++++++++++++++++++++++++++++++++++
> 2 files changed, 39 insertions(+)
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
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next prev parent reply other threads:[~2021-03-29 17:13 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-25 15:07 [RFC 0/8] virtio: Improve boot time of virtio-scsi-pci and virtio-blk-pci Greg Kurz
2021-03-25 15:07 ` [RFC 1/8] memory: Allow eventfd add/del without starting a transaction Greg Kurz
2021-03-29 17:03 ` Stefan Hajnoczi
2021-03-30 7:47 ` Greg Kurz
2021-03-30 10:16 ` Stefan Hajnoczi
2021-03-25 15:07 ` [RFC 2/8] virtio: Introduce virtio_bus_set_host_notifiers() Greg Kurz
2021-03-29 17:06 ` Stefan Hajnoczi [this message]
2021-03-25 15:07 ` [RFC 3/8] virtio: Add API to batch set host notifiers Greg Kurz
2021-03-29 17:10 ` Stefan Hajnoczi
2021-03-30 10:17 ` Greg Kurz
2021-03-30 13:55 ` Stefan Hajnoczi
2021-03-30 14:17 ` Greg Kurz
2021-03-31 14:47 ` Stefan Hajnoczi
2021-03-31 16:21 ` Greg Kurz
2021-03-25 15:07 ` [RFC 4/8] virtio-pci: Batch add/del ioeventfds in a single MR transaction Greg Kurz
2021-03-29 17:24 ` Stefan Hajnoczi
2021-03-30 10:29 ` Greg Kurz
2021-03-25 15:07 ` [RFC 5/8] virtio-blk: Fix rollback path in virtio_blk_data_plane_start() Greg Kurz
2021-03-29 17:25 ` Stefan Hajnoczi
2021-03-25 15:07 ` [RFC 6/8] virtio-blk: Use virtio_bus_set_host_notifiers() Greg Kurz
2021-03-29 17:26 ` Stefan Hajnoczi
2021-03-25 15:07 ` [RFC 7/8] virtio-scsi: Set host notifiers and callbacks separately Greg Kurz
2021-03-25 15:07 ` [RFC 8/8] virtio-scsi: Use virtio_bus_set_host_notifiers() Greg Kurz
2021-03-29 17:28 ` Stefan Hajnoczi
2021-03-25 17:05 ` [RFC 0/8] virtio: Improve boot time of virtio-scsi-pci and virtio-blk-pci Michael S. Tsirkin
2021-03-25 17:43 ` Stefan Hajnoczi
2021-03-25 20:51 ` Greg Kurz
2021-03-25 18:05 ` Greg Kurz
2021-03-29 17:35 ` Stefan Hajnoczi
2021-03-30 13:15 ` Greg Kurz
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