Messages in this thread | | | Date | Wed, 11 Feb 2009 15:13:49 -0500 | From | Mathieu Desnoyers <> | Subject | Re: [BUG] Linux 2.6.28.4 freezing on a 32-bits x86 Thinkpad T43p |
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* Ingo Molnar (mingo@elte.hu) wrote: > > * Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> wrote: > > > Here is a new backtrace, taken with a huge amount of debugging active, which still > > points to an interrupt handler nested over kvm_mmu_pte_write as the culprit. It's > > weird that the kvm code gets called on my modest Pentium M laptop, which I think > > has no VT-x support at all. I am not running any KVM VMs on this machine. The > > problem still happens on 2.6.28.4, and Slub redzones did not identify any memory > > corruption. This could be due to kvm_mmu_pte_write which either should not be > > called at all, or due to improper interrupt disabling in this function. > > Does latest tip:master fix it? In particular this one: > > 9cf161a: x86/cpa: make sure cpa is safe to call in lazy mmu mode > > fixes a crasher related to KVM and mmu notifiers ... > > Ingo
I'll try to apply commit 9cf161a: x86/cpa: make sure cpa is safe to call in lazy mmu mode
To my 2.6.28.4 kernel to change the configuration minimally and see if it helps. I guess we'll have to wait a few days before the problem is reproduced, and even more if it's not. :)
Thanks a lot!
Mathieu
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