Messages in this thread | | | Date | Sat, 16 Feb 2008 22:46:23 +1100 | From | Jeremy Fitzhardinge <> | Subject | Re: 2.6.25-rc1 xen pvops regression |
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Joel Becker wrote: > On Sat, Feb 16, 2008 at 01:44:26PM +1100, Jeremy Fitzhardinge wrote: > >> Joel Becker wrote: >> >> >>> (XEN) mm.c:1825:d109 Bad type (saw 0000000028000001 != exp >>> 00000000e0000000) for mfn 3a2f0f (pfn f0) >>> (XEN) mm.c:649:d109 Error getting mfn 3a2f0f (pfn f0) from L1 entry >>> 00000003a2f0f063 for dom109 >>> (XEN) mm.c:1825:d109 Bad type (saw 0000000028000001 != exp >>> 00000000e0000000) for mfn 3a2f0f (pfn f0) >>> (XEN) mm.c:649:d109 Error getting mfn 3a2f0f (pfn f0) from L1 entry >>> 00000003a2f0f063 for dom109 >>> (XEN) mm.c:3331:d109 ptwr_emulate: could not get_page_from_l1e() >>> >>> >> Hm, I have a suspicion about what this might be. I'll haven't tried >> reproducing it yet though. >> >> >>> (XEN) Unhandled page fault in domain 109 on VCPU 0 (ec=0003) >>> (XEN) Pagetable walk from 00000000c01687f0: >>> (XEN) L4[0x000] = 00000003a2933027 00000000000006cc >>> (XEN) L3[0x003] = 000000039afea027 0000000000000005 >>> (XEN) L2[0x000] = 000000039bfb7067 0000000000001048 (XEN) L1[0x168] = >>> 00000003a2e97061 0000000000000168 >>> (XEN) domain_crash_sync called from entry.S >>> (XEN) Domain 109 (vcpu#0) crashed on cpu#2: >>> (XEN) ----[ Xen-3.1.3-rc3 x86_64 debug=n Not tainted ]---- >>> (XEN) CPU: 2 >>> (XEN) RIP: e019:[<00000000c04040bd>] >>> >>> >> What does this EIP correspond to in your kernel? Also: >> >> c01687f0 c0417ab6 c040288f c040299a c0403270 >> >> (as guesses of potential callers to try and work out a stack trace). >> > > ksymoops is no help at all, but I got these from objdump of > vmlinux: > > c04040bd xen_set_pte > c0417ab6 set_pte_present > c040288f set_bit > c040299a __raw_spin_unlock > c0403270 __set_64bit
(My usual technique is use "gdb vmlinux" and "x/i 0x...." to do the lookup.)
Unfortunately that doesn't narrow down what the kernel was actually trying to do at the time. Clearly a set_pte; looks like someone is trying to create a writable mapping of an existing pte page.
Does "console=hvc0 earlyprintk=xen" on the kernel command line give any clue about how far it gets before crashing?
J
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