On Sat, Feb 20, 2010 at 05:09:31PM +0200, Pasi Kärkkäinen wrote: > On Mon, Feb 01, 2010 at 10:20:26AM +0200, Pasi Kärkkäinen wrote: > > On Sat, Jan 30, 2010 at 10:57:02AM +1100, Norman Gaywood wrote: > > > On Sat, Jan 09, 2010 at 03:45:15PM +0200, Pasi Kärkkäinen wrote: > > > > > I'm running 2.6.18-164.11.1.el5xen and the fedora kernels for F11 and F12 > > > are not very stable for me. Dom0 is a Centos 5.4 2.6.18-164.9.1.el5xen > > > kernel. > > > > > > These fedora kernels seem to lockup (processes get stuck in D state) > > > whenever put under any load: > > > > > > kernel-2.6.30.10-105.fc11.x86_64 > > > kernel-2.6.31.6-166.fc12.x86_64 > > > kernel-2.6.31.9-174.fc12.x86_64
> > Do you have some easy-to-reproduce test/script so I could try it on my > > system? No unfortuately. It's very difficult to pin down the workload that causes this. The test systems I've tried don't seem to trigger it. The crash does not even seem to be related to a heavy load. We will have several LTSP users and a little bit of disk activity and suddenly it will trip into the D state lockup. This could be after many hours (up to 2 days) of running, or in our worst case 2 minutes. > > > Here are some bugzilla entries (one posted by me) that point to this > > > problem: > > > > > > kernel 2.6.31 processes lock up in D state > > > https://bugzilla.redhat.com/show_bug.cgi?id=550724 > > > > > > FC12 2.6.31.9-174.fc12.x86_64 hangs under heavy disk I/O > > > https://bugzilla.redhat.com/show_bug.cgi?id=551552 And this one as well seems to be the same issue if you look at the end of the report: F12 Xen DomU unstable (2.6.31) https://bugzilla.redhat.com/show_bug.cgi?id=526627 > I haven't seen these D state problems, but I found this CONFIG_HIGHPTE > xen_set_pte() bug/race > that causes 32bit PAE guest crashes: > > https://bugzilla.redhat.com/show_bug.cgi?id=566932 > > Were your guests 32bit? No, they are 64bit. If I google around, I can find people which look like they have had similar issues. Most threads die out with no resolution. Here is one that looks similar on the kernel mailing list: http://www.mail-archive.com/k...@vger.kernel.org/msg23039.html -- Norman Gaywood, Computer Systems Officer University of New England, Armidale, NSW 2351, Australia ngayw...@une.edu.au Phone: +61 (0)2 6773 3337 http://mcs.une.edu.au/~norm Fax: +61 (0)2 6773 3312 Please avoid sending me Word or PowerPoint attachments. See http://www.gnu.org/philosophy/no-word-attachments.html _______________________________________________ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
