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Date: Wed, 1 Apr 2015 15:02:45 +0200 (CEST)
From: Alexandre DERUMIER <aderumier@odiso.com>
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Subject: Re: [Qemu-devel] virtio-scsi + iothread : segfault on drive_del
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To: pbonzini <pbonzini@redhat.com>
Cc: qemu-devel <qemu-devel@nongnu.org>

Ok,

thanks paolo !

----- Mail original -----
De: "pbonzini" <pbonzini@redhat.com>
=C3=80: "aderumier" <aderumier@odiso.com>, "qemu-devel" <qemu-devel@nongnu.=
org>
Envoy=C3=A9: Mercredi 1 Avril 2015 12:27:27
Objet: Re: virtio-scsi + iothread : segfault on drive_del

On 01/04/2015 05:34, Alexandre DERUMIER wrote:=20
>=20
> I'm currently testing virtio-scsi and iothread,=20
>=20
> and I'm seeing qemu segfault when I try to remove an scsi drive=20
> on top of an virtio-scsi controller with iothread enabled.=20
>=20
>=20
> virtio-blk + iothread drive_del is supported since this patch=20
>=20
> http://comments.gmane.org/gmane.comp.emulators.qemu/291562=20
> "block: support drive_del with dataplane=20
>=20
> This series makes hot unplug work with virtio-blk dataplane devices. It s=
hould=20
> also work with Fam's virtio-scsi dataplane patches."=20

virtio-scsi + iothread is experimental and not yet thread-safe.=20

Deadlocks or crashes are expected, and not really fixable without a lot=20
of preparatory changes to core QEMU code. These are being done, but I=20
don't expect it to be fixed before 2.5.=20

Paolo=20