From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47576) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cwUPf-0006nU-5f for qemu-devel@nongnu.org; Fri, 07 Apr 2017 09:58:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cwUPe-0002AE-Aq for qemu-devel@nongnu.org; Fri, 07 Apr 2017 09:58:55 -0400 References: <67b441ce-ee18-c6d5-df5f-224439214ab8@redhat.com> From: Max Reitz Message-ID: <6838894a-e6ab-1c83-25a1-163c35fd0a38@redhat.com> Date: Fri, 7 Apr 2017 15:58:37 +0200 MIME-Version: 1.0 In-Reply-To: <67b441ce-ee18-c6d5-df5f-224439214ab8@redhat.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="xgOPU1RKN2H6OFFwdeSrGaC0ULit15GrQ" Subject: Re: [Qemu-devel] New iotest repros failures on virtio external snapshot with iothread List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Eric Blake , Ed Swierk , Fam Zheng , Kevin Wolf , Paolo Bonzini , John Snow , qemu-devel@nongnu.org, qemu-block@nongnu.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --xgOPU1RKN2H6OFFwdeSrGaC0ULit15GrQ From: Max Reitz To: Eric Blake , Ed Swierk , Fam Zheng , Kevin Wolf , Paolo Bonzini , John Snow , qemu-devel@nongnu.org, qemu-block@nongnu.org Message-ID: <6838894a-e6ab-1c83-25a1-163c35fd0a38@redhat.com> Subject: Re: [Qemu-devel] New iotest repros failures on virtio external snapshot with iothread References: <67b441ce-ee18-c6d5-df5f-224439214ab8@redhat.com> In-Reply-To: <67b441ce-ee18-c6d5-df5f-224439214ab8@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 30.03.2017 04:16, Eric Blake wrote: > On 03/29/2017 09:01 PM, Ed Swierk via Qemu-devel wrote: >> Parts of qemu's block code have changed a lot in recent months but are= >> not well exercised by current tests. >> >> Subtle bugs have crept in causing assertion failures, hangs and other >> crashes in a variety of situations: immediately on start, on first >> guest activity, on external snapshot create or commit, on qmp quit >> command. >> >> Reproducing these bugs has proved tricky, as each may occur only with >> a specific combination of qemu version, block device type (virtio-blk >> or virtio-scsi) and iothread enabled or not. In some cases the bug >> occurs only after several external snapshot operations. And in some >> cases the bug only manifests when a guest is accessing the block >> device simultaneously. >> >> I've written an iotest (number 176, for now) that attempts to cover >=20 > At least one other thread has already proposed a test 176. It's > somewhat straightforward to renumber things, but I'm wondering if there= > is some even-more-efficient way of reserving test numbers, perhaps > through the wiki, since we are finding that test numbers get reserved > several weeks before actually getting merged into the tree. As a maintainer, I don't mind collisions; I can and will rename tests. For all I care, you can even name all of your tests 001. Max --xgOPU1RKN2H6OFFwdeSrGaC0ULit15GrQ Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQFGBAEBCAAwFiEEkb62CjDbPohX0Rgp9AfbAGHVz0AFAljnmw0SHG1yZWl0ekBy ZWRoYXQuY29tAAoJEPQH2wBh1c9AeZkH/2RZvA4tlnSgh8n85mCtzHBb0td30X1/ k22KdiJqqTCEBPKIqmuHsgwPxlv7DYwePz6oIK4CJQyL6ljA6mbcYvYZxM8Cn6Er g+6j2ujcgA5qTX2yB/tjwtUfCnIPbS7QI7ZsJka2or7uWNttbqD7IrWq3Lq+PQK5 JI+vCMetM5N9XgY1clE/QjEQSI8HI49lN23rGfG1v4rtD0E2ANRYyO+QleDKroXd UKZVZwbMZAW+nn7qO+qthpeWvzSOvgC+QQhG493Cr56t0pzWXfE8nUSqdvGh5k79 Wp5eWxaAPxynrOtTIkoKKoCgY7VN5j4/x8Z5zqnK0Sydqc+NOUH9Kxk= =o6iV -----END PGP SIGNATURE----- --xgOPU1RKN2H6OFFwdeSrGaC0ULit15GrQ--