Hi Fengguang, I can reproduce this bug in my test case, and have posted a patch to fix it which can found at: http://marc.info/?l=linux-mm&m=134129723504527&w=2 Could you please try it? On 06/04/2012 07:46 PM, Fengguang Wu wrote: > Hi, > > I'm running lots of kvm instances for doing kernel boot tests. > Unfortunately the test system itself is not stable enough, I got scary > errors in both kvm and the host kernel. Like this. > > [294025.795382] kvm used greatest stack depth: 2896 bytes left > [310388.622083] kvm[1864]: segfault at c ip 00007f498e9f6a81 sp 00007f4994b9fca0 error 4 in kvm[7f498e960000+33b000] > [310692.050589] kvm[4332]: segfault at 10 ip 00007fca662620b9 sp 00007fca70472af0 error 6 in kvm[7fca661cc000+33b000] > [312608.950120] kvm[18931]: segfault at 8 ip 00007f95962a10a5 sp 00007f959d777170 error 4 in kvm[7f959620b000+33b000] > [312622.941640] kvm[19123]: segfault at 10 ip 00007f406f5580b9 sp 00007f4077d8b350 error 6 in kvm[7f406f4c2000+33b000] > [313917.860951] kvm[28789]: segfault at c ip 00007f718f4dfa81 sp 00007f7198459520 error 4 in kvm[7f718f449000+33b000] > [313919.177192] kvm used greatest stack depth: 2864 bytes left > [314061.390945] kvm used greatest stack depth: 2208 bytes left > [327479.676068] BUG: Bad page state in process kvm pfn:59ac9 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
