[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] What is the current state of Dom0 kernel support? / crash
On Wed, Jul 22, 2009 at 12:14:37PM -0700, Jeremy Fitzhardinge wrote: > On 07/21/09 06:03, Pasi Kärkkäinen wrote: > > I just tried the latest 32b PAE rebase/master tree (2.6.31-rc3). > > > > http://pasik.reaktio.net/xen/pv_ops-dom0-debug/pv_ops-dom0-log-10-rebase-master-with-highpte.txt > > > > Checking if this processor honours the WP bit even in supervisor mode... > > BUG: unable to handle kernel NULL pointer dereference at (null) > > IP: [<c058cdcb>] xen_evtchn_do_upcall+0xcc/0x13f > > *pdpt = 000000003d275001 > > Thread overran stack, or stack corrupted > > Oops: 0000 [#1] SMP > > last sysfs file: > > Modules linked in: > > > > Pid: 0, comm: swapper Not tainted (2.6.31-rc3 #20) P8SC8 > > EIP: 0061:[<c058cdcb>] EFLAGS: 00010046 CPU: 0 > > EIP is at xen_evtchn_do_upcall+0xcc/0x13f > > EAX: 00000000 EBX: ffffffff ECX: 00000000 EDX: 00000000 > > ESI: 00000000 EDI: c08ec558 EBP: c087eedc ESP: c087eea0 > > DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: e021 > > Process swapper (pid: 0, ti=c087e000 task=c083b1a0 task.ti=c087e000) > > Stack: > > 00001a6e 00000220 00000200 00000000 00000000 00000000 e3201014 c08ec558 > > <0> c087eee4 f5681000 e3201010 00000000 00000000 c09017f8 f54ff000 c087ef20 > > <0> c0409927 00000000 c09017f8 f54ff000 c09017f8 f54ff000 c087ef20 c0843f70 > > Call Trace: > > [<c0409927>] ? xen_do_upcall+0x7/0xc > > [<c0404581>] ? xen_pte_clear+0x9/0x12 > > [<c0427a94>] ? set_pte_vaddr+0xb4/0xc4 > > [<c0426c8c>] ? __native_set_fixmap+0x25/0x30 > > [<c040471a>] ? xen_set_fixmap+0xc7/0xcc > > [<c0897d86>] ? mem_init+0x24a/0x298 > > [<c088367e>] ? start_kernel+0x14b/0x2cd > > [<c088336f>] ? unknown_bootoption+0x0/0x18e > > [<c0883082>] ? i386_start_kernel+0x71/0x79 > > [<c0886188>] ? xen_start_kernel+0x52a/0x533 > > Code: d0 89 45 cc 89 55 c8 eb 16 0f bc c8 03 4d d4 8b 04 8a 83 f8 ff 74 f8 > > 8b 55 e4 e8 36 de e7 ff 8b 55 f0 8b 45 d0 03 > > 05 1c 0c 97 c0 <8b> 0c 10 8b 55 e8 8b 45 cc 23 0c 82 8b 45 c8 8b 04 82 8b 15 > > 18 > > EIP: [<c058cdcb>] xen_evtchn_do_upcall+0xcc/0x13f SS:ESP e021:c087eea0 > > CR2: 0000000000000000 > > ---[ end trace 4eaa2a86a8e2da22 ]--- > > Kernel panic - not syncing: Fatal exception in interrupt > > > > Haven't seen that one before. > Ok. I've seen many people report crashes during startup with rebase/master on 32b PAE. I assume they're seeing this same issue. > The stack backtrace is a bit fuzzy; do you have CONFIG_FRAMEPOINTER enabled? > And if you have CONFIG_DEBUGINFO enabled, you can map the eip c058cdcb > to a specific source line (its not clear to me which pointer is NULL). > [root@dom0test linux-2.6-xen]# grep -i CONFIG_FRAMEPOINTER .config [root@dom0test linux-2.6-xen]# grep -i CONFIG_DEBUGINFO .config [root@dom0test linux-2.6-xen]# Unfortunately those were not enabled.. I'll build a new kernel with CONFIG_DEBUGINFO enabled. -- Pasi _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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