From mboxrd@z Thu Jan 1 00:00:00 1970 From: micah anderson Subject: Re: domU crashing, trying to determine why Date: Tue, 04 Jan 2011 14:49:45 -0500 Message-ID: <87k4ikcuue.fsf@algae.riseup.net> References: <87mxnka0yg.fsf@algae.riseup.net> <20110101214106.GE2754@reaktio.net> <87ipy89lu3.fsf@algae.riseup.net> <20110102125913.GF2754@reaktio.net> <8762u79nph.fsf@algae.riseup.net> <20110102183909.GG2754@reaktio.net> <87wrmm8xi3.fsf@algae.riseup.net> <20110103053435.GH2754@reaktio.net> <20110103164031.GB14102@dumpdata.com> <1294138484.3831.132.camel@zakaz.uk.xensource.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1391687614==" Return-path: In-Reply-To: <1294138484.3831.132.camel@zakaz.uk.xensource.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Ian Campbell , Konrad Rzeszutek Wilk Cc: "xen-devel@lists.xensource.com" List-Id: xen-devel@lists.xenproject.org --===============1391687614== Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha512; protocol="application/pgp-signature" --=-=-= Content-Transfer-Encoding: quoted-printable On Tue, 4 Jan 2011 10:54:44 +0000, Ian Campbell w= rote: > On Mon, 2011-01-03 at 16:40 +0000, Konrad Rzeszutek Wilk wrote: > > > > I've got this setup: > > > >=20 > > > > vcpus=3D2 > > > > cpus=3D[1,3] > >=20 > > Is there anything in the Xen hypervisor ring buffer? >=20 > Equally was there anything on the guest console? If it is dying before > you can look then you can enable logging via XENCONSOLED_TRACE=3Dguest > in /etc/sysconfig/xencommons or /etc/default/xencommons (depending on > distro). Logs show up in /var/log/xen/guest/ Because I configured 'on_crash =3D preserve' I can see the console after it crashes, but no, there is nothing on the guest console, except for the login prompt (which of course no longer works). > If the guest is still running but deadlocked or similar then it might be > worth sending a few SysRQs to it. To do this press Ctrl-O on the guest > console and press one of the magic letters, 'h' will give help. > 't' (tasks) would be a useful start as would 'p' (processor state). I'll try this on the next crash. It crashed this morning, so I took the liberty of adding the kernel log parameters so I can get xen hypervisor ring buffer debugging information for the next crash. > It might be worth compiling your guest kernel with lockdep support and > seeing if it complains about anything. Is this a .config option? If so, what is it? > Also, I notice you seem to be running the Debian Lenny classic-Xen > forward port. Are you running the most recent version of that kernel? > Unfortunately there is not much developer interest in these classic-Xen > forwards ports these days. Yes, I am running the up-to-date Debian Lenny kernel. One solution of course is to upgrade the system to Squeeze to get an overhaul of the whole subsystem, getting a newer kernel/xen completely... but of course that is a bigger change, and would not give us any clue as to what is going on. > You could also try the -686-bigmem kernel flavour from Lenny which is a > PVops enabled kernel, or perhaps a Squeeze kernel from backports.org > (either -686-bigmem or -xen-686, both are pvops kernels). If your > problem persists with these then there is more chance of it getting > fixed than with the Lenny -xen-686 flavour. Do you mean run that kernel in the Dom0, or the DomU?=20 thanks, micah --=-=-= Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iQIcBAEBCgAGBQJNI3nZAAoJEIy/mjIoYaeQUFYP/3TyyrD/UQjdH8pTHlXJ8IVB t5D2ICvIvy25WHbelQAf6yPoMiKnqhoKTFs6yQVg0gxJxSH8cnldqeVY+AbOWnLV sNhfQcwdxTVAoaYR5Wk4AnZw8rhB9LvHC3ZpE4ttTr232kBptkZlndbDCHxDVckd XsSgvscnHfCdnn7LVNUTGk1yWjKWr3SgY4IjMTy8RPXObiS6IEfmCmkv7U6/BH7x XfJ460QMPUV8tVxy8BjB7Nd/izV5HTGCL+0O4nyh2rbVowVRT7RniGb9bXd7+PYv e8lurHA4fL4cmkjI5pIi1/XQaaCCH8GK3bHiBs7seRdtfJEwXcrPvpX/ZngdW1nq Cvajb5rDdkn/xEK7QnilANSPGBtYfNkBOvBYArXygc9Sjyq3jJzluswYchnKuz6w WY35fD7MRLE48mQEkSU6Hjd+rvfZLISUqoxMNTF8wx6PqNK3JcUGpiEArbnjn6mp S8EUvKfzu5VO3/2/JqSsdOYVO7a12YPyd1fJfMAtNKe2hlMQyB2gjgZnyeYtION6 VtNckACi5BpyJwIuF3JtDJRYyFv4eEL46go1+dwKcd2MiS2jWCBMt43mcSJwtRZT vFwvZUF0KjMOd/dN4Hkh7g46fmkZWgdZjPPCDT+E/YcFvJwY5y/KPNcPaNRhfK/i xsq/DKjYPgVWkdBFy/XJ =7P5a -----END PGP SIGNATURE----- --=-=-=-- --===============1391687614== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel --===============1391687614==--