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xen-devel
[Xen-devel] RE: Kernel BUG at arch/x86/mm/tlb.c:61
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Subject: |
[Xen-devel] RE: Kernel BUG at arch/x86/mm/tlb.c:61 |
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From: |
MaoXiaoyun <tinnycloud@xxxxxxxxxxx> |
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Date: |
Mon, 25 Apr 2011 23:05:24 +0800 |
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xen devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, giamteckchoon@xxxxxxxxx, konrad.wilk@xxxxxxxxxx |
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Mon, 25 Apr 2011 08:06:26 -0700 |
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Please ignore my last two mails, I just learnt that Current is meanless in irq context.
Just come up one whole assumption:
In my opinion:
1) CPU running in switch_mm has the possiblity of receiving IPI message and enter interrupt
2) Before revert that patch, not matter the if statement is true or not, the cpu_tlbstate.state
could be changed to TLBSTATE_OK, right before enter irq routhine
3) Since the cpu_tlbstate is per CPU variable, before calling leave_mm(), test cpu_tlbstate.state
in drop_other_mm_ref is feasible and nessary
4) If I am right, strange thing is the code of 2.6.32.36 is same as 2.6.31.x, which we never met tlb bug before.
any comments?
Many thanks.
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- RE: [Xen-devel] RE: Kernel BUG at arch/x86/mm/tlb.c:61, (continued)
- Re: [Xen-devel] RE: Kernel BUG at arch/x86/mm/tlb.c:61, Jeremy Fitzhardinge
- RE: [Xen-devel] RE: Kernel BUG at arch/x86/mm/tlb.c:61, Tian, Kevin
- RE: [Xen-devel] RE: Kernel BUG at arch/x86/mm/tlb.c:61, MaoXiaoyun
- RE: [Xen-devel] RE: Kernel BUG at arch/x86/mm/tlb.c:61, Tian, Kevin
- [Xen-devel] RE: Kernel BUG at arch/x86/mm/tlb.c:61, MaoXiaoyun
- [Xen-devel] RE: Kernel BUG at arch/x86/mm/tlb.c:61, MaoXiaoyun
- [Xen-devel] RE: Kernel BUG at arch/x86/mm/tlb.c:61, MaoXiaoyun
- [Xen-devel] RE: Kernel BUG at arch/x86/mm/tlb.c:61,
MaoXiaoyun <=
- RE: [Xen-devel] RE: Kernel BUG at arch/x86/mm/tlb.c:61, Tian, Kevin
- [Xen-devel] Re: kernel BUG at arch/x86/xen/mmu.c:1872, Teck Choon Giam
[Xen-devel] Re: kernel BUG at arch/x86/xen/mmu.c:1860!, Joerg Stephan
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