Ulf Kreutzberg
2010-Oct-06 15:50 UTC
[Xen-devel] XFS causes Kernel trace with Jeremy''s pv_ops kernel
Hi Jeremy, hi all, I have checked out Jeremy''s last git built of dom0 pv_ops kernel 2.6.32.23: commit 41a85de5caef68bbd58e11ed7b781b7867d96eaa Merge: 62bf426... 0ee0f94... Author: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Date: Tue Sep 28 11:20:40 2010 -0700 I have set up on a Dell PE1950 2xDualXeon 5130 an LVM2 partition containing XFS. I have built Jeremy''s kernel successfully, so the running dom0 Kernel is the one mentioned above. System is Debian-Lenny, Xen and Xen-tools are self-built. If I make some I/O, eg: cd linux-2.6-xen-git (which is then on the lv with the XFS filesystem) make -j 7 ; make install; make -j 7 modules; make modules_install in dmesg appears a kernel trace after a while. But compiling continues and all keeps up and running. This only happens if the kernel is running under xen 4.0.2-rc1-pre hypervisor. Nothing strange happens if I run it on bare-metal (same machine) without hypervisor. I have not tested bonnie or iozone yet. I have attached booting output of xen 4.0.2-rc1-pre as well as the trace (file console-kerneltrace.txt). Kernel config is also attached (config-2.6.32.23.txt) Perhaps you can help. Please let me know if I have forgotten any important information. Many thanks and best regards, Ulf Kreutzberg Viele Grüße, Ulf -- Ulf Kreutzberg Systemadministration, Shared Hosting Abteilung Technik E-Mail: uk@hosteurope.de Telefon: +49 2203 1045-7355 Fax: +49 180 5 66 3233 (*) ----------------------------------------------------------------------- Host Europe GmbH - http://www.hosteurope.de Welserstraße 14 - 51149 Köln - Germany Telefon: 0800 467 8387 - Fax: +49 180 5 66 3233 (*) HRB 28495 Amtsgericht Köln - USt-IdNr.: DE187370678 Geschäftsführer: Uwe Braun - Alex Collins - Mark Joseph - Patrick Pulvermüller (*) 0,14 EUR/Min. aus dem dt. Festnetz; maximal 0,42 EUR/Min. aus den dt. Mobilfunknetzen _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Ulf Kreutzberg
2010-Oct-07 10:14 UTC
[Xen-devel] XFS causes Kernel trace with Jeremy''s pv_ops kernel
Hi Jeremy, hi all, I have checked out Jeremy''s last git built of dom0 pv_ops kernel 2.6.32.23: commit 41a85de5caef68bbd58e11ed7b781b7867d96eaa Merge: 62bf426... 0ee0f94... Author: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Date: Tue Sep 28 11:20:40 2010 -0700 I have set up on a Dell PE1950 2xDualXeon 5130 an LVM2 partition containing XFS. I have built Jeremy''s kernel successfully, so the running dom0 Kernel is the one mentioned above. System is Debian-Lenny, Xen and Xen-tools are self-built. If I make some I/O, eg: cd linux-2.6-xen-git (which is then on the lv with the XFS filesystem) make -j 7 ; make install; make -j 7 modules; make modules_install in dmesg appears a kernel trace after a while. But compiling continues and all keeps up and running. This only happens if the kernel is running under xen 4.0.2-rc1-pre hypervisor. Nothing strange happens if I run it on bare-metal (same machine) without hypervisor. I have not tested bonnie or iozone yet. I have attached booting output of xen 4.0.2-rc1-pre as well as the trace (file console-kerneltrace.txt). Kernel config is also attached (config-2.6.32.23.txt) Perhaps you can help. Please let me know if I have forgotten any important information. Many thanks and best regards, Ulf Kreutzberg Viele Grüße, Ulf -- Ulf Kreutzberg Systemadministration, Shared Hosting Abteilung Technik E-Mail: uk@hosteurope.de Telefon: +49 2203 1045-7355 Fax: +49 180 5 66 3233 (*) ----------------------------------------------------------------------- Host Europe GmbH - http://www.hosteurope.de Welserstraße 14 - 51149 Köln - Germany Telefon: 0800 467 8387 - Fax: +49 180 5 66 3233 (*) HRB 28495 Amtsgericht Köln - USt-IdNr.: DE187370678 Geschäftsführer: Uwe Braun - Alex Collins - Mark Joseph - Patrick Pulvermüller (*) 0,14 EUR/Min. aus dem dt. Festnetz; maximal 0,42 EUR/Min. aus den dt. Mobilfunknetzen _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Jeremy Fitzhardinge
2010-Oct-07 21:53 UTC
Re: [Xen-devel] XFS causes Kernel trace with Jeremy''s pv_ops kernel
On 10/07/2010 03:14 AM, Ulf Kreutzberg wrote:> Hi Jeremy, > hi all, > > > I have checked out Jeremy''s last git built of dom0 pv_ops kernel 2.6.32.23: > > commit 41a85de5caef68bbd58e11ed7b781b7867d96eaa > Merge: 62bf426... 0ee0f94... > Author: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> > Date: Tue Sep 28 11:20:40 2010 -0700 > > I have set up on a Dell PE1950 2xDualXeon 5130 an LVM2 partition > containing XFS. I have built Jeremy''s kernel successfully, so the > running dom0 Kernel is the one mentioned above. > System is Debian-Lenny, Xen and Xen-tools are self-built. > > If I make some I/O, eg: > cd linux-2.6-xen-git (which is then on the lv with the XFS filesystem) > make -j 7 ; make install; make -j 7 modules; make modules_install > > in dmesg appears a kernel trace after a while. But compiling continues > and all keeps up and running. This only happens if the kernel is running > under xen 4.0.2-rc1-pre hypervisor. Nothing strange happens if I run it > on bare-metal (same machine) without hypervisor. > I have not tested bonnie or iozone yet. > > I have attached booting output of xen 4.0.2-rc1-pre > as well as the trace (file console-kerneltrace.txt). > Kernel config is also attached (config-2.6.32.23.txt)This doesn''t look obviously Xen specific. At least at one point XFS was prone to spurious lockdep warnings that were hard to eliminate. I wonder if its possible you''re seeing this under Xen because of some kind of timing issue? Of course it could be Xen related too, but as I said, nothing stands out. J> Perhaps you can help. Please let me know if I have forgotten any > important information. > > Many thanks and best regards, > Ulf Kreutzberg > > > Viele Grüße, > Ulf > > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Ulf Kreutzberg
2010-Oct-08 10:15 UTC
Re: [Xen-devel] XFS causes Kernel trace with Jeremy''s pv_ops kernel
Hi Jeremy, thank you for your answer. I wonder if it is a then a problem with the git kernel. It seems only to occur if it is running under Xen (4). If I boot the kernel on bare metal, anythig works fine. As an additional info, under kernel 2.6.27.5 (formerly taken from git) under xen 3.4.0 (which is then not a pv_ops kernel) all works fine, too. So my question would be, how to get the issue solved? Do you have any Ideas? Best regards, Ulf Am 07.10.2010 23:53, schrieb Jeremy Fitzhardinge:> On 10/07/2010 03:14 AM, Ulf Kreutzberg wrote: >> Hi Jeremy, >> hi all, >> >> >> I have checked out Jeremy''s last git built of dom0 pv_ops kernel 2.6.32.23: >> >> commit 41a85de5caef68bbd58e11ed7b781b7867d96eaa >> Merge: 62bf426... 0ee0f94... >> Author: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> >> Date: Tue Sep 28 11:20:40 2010 -0700 >> >> I have set up on a Dell PE1950 2xDualXeon 5130 an LVM2 partition >> containing XFS. I have built Jeremy''s kernel successfully, so the >> running dom0 Kernel is the one mentioned above. >> System is Debian-Lenny, Xen and Xen-tools are self-built. >> >> If I make some I/O, eg: >> cd linux-2.6-xen-git (which is then on the lv with the XFS filesystem) >> make -j 7 ; make install; make -j 7 modules; make modules_install >> >> in dmesg appears a kernel trace after a while. But compiling continues >> and all keeps up and running. This only happens if the kernel is running >> under xen 4.0.2-rc1-pre hypervisor. Nothing strange happens if I run it >> on bare-metal (same machine) without hypervisor. >> I have not tested bonnie or iozone yet. >> >> I have attached booting output of xen 4.0.2-rc1-pre >> as well as the trace (file console-kerneltrace.txt). >> Kernel config is also attached (config-2.6.32.23.txt) > > This doesn''t look obviously Xen specific. At least at one point XFS was > prone to spurious lockdep warnings that were hard to eliminate. I > wonder if its possible you''re seeing this under Xen because of some kind > of timing issue? > > Of course it could be Xen related too, but as I said, nothing stands out. > > J > >> Perhaps you can help. Please let me know if I have forgotten any >> important information. >> >> Many thanks and best regards, >> Ulf Kreutzberg >> >> >> Viele Grüße, >> Ulf >> >> >> >> _______________________________________________ >> Xen-devel mailing list >> Xen-devel@lists.xensource.com >> http://lists.xensource.com/xen-devel > >_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel