From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?ISO-8859-1?Q?Lu=EDs?= Silva Subject: Re: Tapdisk2 problem Date: Sun, 15 Aug 2010 17:14:01 +0100 Message-ID: <1281888841.4853.7.camel@luis-port> References: <1280930679.3277.11.camel@luis-port> Reply-To: luis.silva@axiomasoft.pt Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0827203800==" Return-path: In-Reply-To: <1280930679.3277.11.camel@luis-port> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: xen-devel@lists.xensource.com Cc: Jeremy Fitzhardinge List-Id: xen-devel@lists.xenproject.org --===============0827203800== Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-nT19v4KntOY0BihJrJm0" --=-nT19v4KntOY0BihJrJm0 Content-Type: multipart/alternative; boundary="=-EQ6oIk6BMsdDIVifly9P" --=-EQ6oIk6BMsdDIVifly9P Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello again, I've tried updating the kernel as blktap has had some work on it, but the problem remains. The up to date xen/stable-2.6.32.x still behaves as described bellow. Also, I've tested this procedure against kernel 2.6.34.1 with Suse backported patches and the problem doesn't exist. I haven't still tried updating xen to 4.0.1-rc6, but from the changelog I don't see anything that could change this behaviour... Is anyone with an up to date xen/stable-2.6.32.x kernel seeing this problem or is it just I? Thanks, Lu=C3=ADs On Wed, 2010-08-04 at 15:04 +0100, Lu=C3=ADs Silva wrote: > Hello, >=20 > I'm using both xen 4.0.1-rc5 and the latest pv_ops dom0 kernel (branch > xen/stable-2.6.32.x), but I'm having some problems with tapdisk2... >=20 > Basically, if I create a tap device (tapdisk2 -n > aio:/var/lib/libvirt/images/srv-001-ub1004.img), when I try to > terminate it by issuing "echo 1 > /sys/class/blktap2/blktap0/remove", > the last command hangs and tapdisk2 hangs using 100% cpu. >=20 > This happens both on manual device destruction and on virtual machine > shutdown. I don't know exactly what triggered this behaviour, but I > suspect kernel changes. >=20 > Can anyone confirm this behaviour? >=20 > Thanks, > Lu=C3=ADs=20 >=20 > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel --=-EQ6oIk6BMsdDIVifly9P Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable Hello again,

I've tried updating the kernel as blktap has had some work on it, but the p= roblem remains. The up to date xen/stable-2.6.32.x still behaves as describ= ed bellow. Also, I've tested this procedure against kernel 2.6.34.1 with Su= se backported patches and the problem doesn't exist. I haven't still tried = updating xen to 4.0.1-rc6, but from the changelog I don't see anything that= could change this behaviour...

Is anyone with an up to date xen/stable-2.6.32.x kernel seeing this problem= or is it just I?

Thanks,
Luís

On Wed, 2010-08-04 at 15:04 +0100, Luís Silva wrote:

Hello,

I'm using both xen 4.0.1-rc5 and the latest pv_ops dom0 kernel (branch = xen/stable-2.6.32.x), but I'm having some problems with tapdisk2...

Basically, if I create a tap device (tapdisk2 -n aio:/var/lib/libvirt/i= mages/srv-001-ub1004.img), when I try to terminate it by issuing "echo= 1 > /sys/class/blktap2/blktap0/remove", the last command hangs and= tapdisk2 hangs using 100% cpu.

This happens both on manual device destruction and on virtual machine s= hutdown. I don't know exactly what triggered this behaviour, but I suspect = kernel changes.

Can anyone confirm this behaviour?

Thanks,
Luís=20
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