From: Paolo Bonzini <pbonzini@redhat.com>
To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Rusty Russell <rusty@rustcorp.com.au>,
qemu-devel@nongnu.org, Avi Kivity <avi@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>
Subject: Re: [Qemu-devel] [PATCHv2] virtio: verify that all outstanding buffers are flushed
Date: Wed, 12 Dec 2012 15:01:55 +0100 [thread overview]
Message-ID: <50C88E53.4080200@redhat.com> (raw)
In-Reply-To: <20121212135050.GC16270@stefanha-thinkpad.redhat.com>
Il 12/12/2012 14:50, Stefan Hajnoczi ha scritto:
> VirtIOBlock->rq can trigger the assertion.
>
> IIUC hw/virtio-blk.c may handle I/O errors by keeping the request
> pending and on a list (->rq). This allows the user to restart them
> after, for example, adding more space to the host file system containing
> the disk image file.
>
> We keep a list of failed requests and we migrate this list. So I think
> inuse != 0 when migrating with pending failed I/O requests.
Same for virtio-scsi. Each request in that case is sent as part of the
SCSIDevice that it refers to, via callbacks in SCSIBusInfo.
Paolo
next prev parent reply other threads:[~2012-12-12 14:02 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-12 10:51 [Qemu-devel] [PATCHv2] virtio: verify that all outstanding buffers are flushed Michael S. Tsirkin
2012-12-12 13:50 ` Stefan Hajnoczi
2012-12-12 14:01 ` Paolo Bonzini [this message]
2012-12-12 14:30 ` Michael S. Tsirkin
2012-12-12 14:36 ` Paolo Bonzini
2012-12-12 14:47 ` Michael S. Tsirkin
2012-12-12 15:01 ` Paolo Bonzini
2012-12-12 15:25 ` Michael S. Tsirkin
2012-12-12 15:52 ` Paolo Bonzini
2012-12-12 16:37 ` Michael S. Tsirkin
2012-12-12 16:51 ` Paolo Bonzini
2012-12-12 17:14 ` Michael S. Tsirkin
2012-12-12 17:39 ` Paolo Bonzini
2012-12-12 19:23 ` Michael S. Tsirkin
2012-12-12 21:00 ` Paolo Bonzini
2012-12-12 21:19 ` Michael S. Tsirkin
2012-12-12 21:33 ` Anthony Liguori
2012-12-12 21:51 ` Michael S. Tsirkin
2012-12-14 1:06 ` Rusty Russell
2012-12-14 7:51 ` Paolo Bonzini
2012-12-16 20:36 ` Anthony Liguori
2012-12-13 7:39 ` Paolo Bonzini
2012-12-13 10:48 ` Kevin Wolf
2012-12-16 16:14 ` Michael S. Tsirkin
2012-12-12 14:26 ` Michael S. Tsirkin
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