Package: linux-image-2.6.26-2-amd64 Version: 2.6.26-15 -------- Forwarded Message -------- From: Davide Bologna <davide.bolo...@yahoo.it> To: Debian Kernel Team <debian-kernel@lists.debian.org> Subject: Kernel panic booting Oracle Linux in kvm Date: Mon, 01 Jun 2009 23:05:53 +0200
Hi, I am trying to install KVM based virtual machine with Oracle Linux 5 (afaik is RHEL 5). When kvm boots the installation media it raise a kernel panic. Call Trace: [<ffffffff8007cadb] lapic_watchdog_init+0x1b/0x3c [<ffffffff80077880] setup_apic_nmi_watchdog+0x4Z/0x8a [<ffffffff800770e1] setup_local_APIC+0x17b/0x187 [<ffffffff803f1404] smp_prepare_cpus+0x34b/0x361 [<ffffffff803e78bf] init+0x6Z/0xZf7 [<ffffffff8005dfb1] child_rip+0xa/0x11 [<ffffffff8017161b] acpi_ds_init_one_object+0x0/0x80 [<ffffffff803e785d] init+0x0/0xZf7 [<ffffffff8005dfa7] chiId_rip+0x0/0x11 Code: 0f 30 b8 76 00 13 00 89 d9 0f 30 48 c7 c6 40 6c Z9 80 89 fa RIP [<ffffffff8007cc6f] setup_X7_watchdog+0xZd/0x7a RSP <ffff81003ffbbe50 KerneI panic - not syncing: Fatal exception On LKML I was able to track the problem and found a commit regarding exactly it: http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.26-git9.log --------------------------------------------------------------------------- commit 93ded9b8fd42abe2c3607097963d8de6ad9117eb Merge: 6d52dcb... f756cbd... Author: Linus Torvalds <torva...@linux-foundation.org> Date: Mon Jul 21 15:42:20 2008 -0700 Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6 commit 14ae51b6c068ef7ab52dc2d53fe226e6189f2ab2 Author: Chris Lalancette <clala...@redhat.com> Date: Mon May 5 13:05:16 2008 -0400 KVM: SVM: Fake MSR_K7 performance counters Attached is a patch that fixes a guest crash when booting older Linux kernels. The problem stems from the fact that we are currently emulating MSR_K7_EVNTSEL[0-3], but not emulating MSR_K7_PERFCTR[0-3]. Because of this, setup_k7_watchdog() in the Linux kernel receives a GPF when it attempts to write into MSR_K7_PERFCTR, which causes an OOPs. The patch fixes it by just "fake" emulating the appropriate MSRs, throwing away the data in the process. This causes the NMI watchdog to not actually work, but it's not such a big deal in a virtualized environment. When we get a write to one of these counters, we printk_ratelimit() a warning. I decided to print it out for all writes, even if the data is 0; it doesn't seem to make sense to me to special case when data == 0. Tested by myself on a RHEL-4 guest, and Joerg Roedel on a Windows XP 64-bit guest. Currently I am using 2.6.26 amd64 on testing, which in my understanding should contain the MSR_K7 patch. Unstable 2.6.29 is not affected. I suspect stable also is affected by the bug. I would like to solve this issue in Debian and can contribute more details and test if needed. Best regards Davide
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