From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kip Macy Subject: Re: Unstableness in grant table block drivers Date: Wed, 13 Apr 2005 19:55:08 -0700 Message-ID: References: <1113441492.13301.9.camel@localhost> <425DD4FA.2060009@us.ibm.com> Reply-To: Kip Macy Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <425DD4FA.2060009@us.ibm.com> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Anthony Liguori Cc: xen-devel@lists.xensource.com, Steven Hand List-Id: xen-devel@lists.xenproject.org If I do 3 VMs x 40 iSCSI LUNs/VM x foreach (lun) dd if=3D/dev/zero of=3D/dev/xbd= bs=3D64k iscsi ops will stop going across the wire in 2 - 3 minutes. Access to the LUNs from DOM0 still works. I haven't had a chance to try a smaller configuration. This is all scripted so it only takes a minute to set up, but I'm busy trying to get FreeBSD to run (and not have DOM0 lockup) on a recent -unstable. -Kip On 4/13/05, Anthony Liguori wrote: > Kip Macy wrote: >=20 > >I think it is safe to say that the blkback/blkfront still have some > >serious bugs to be fixed even in the absences of grant tables. > > > > > How many is a lot of VBDs? I've done quite a bit of testing of the > devices (with Xend and with VM-Tools) and I've found the block drivers > to be very reliable. I've not gone much higher than 3 or 4 VBDs for > each domain though. >=20 > Regards, > Anthony Liguoris >