[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-ppc] broken incoming migration
From: |
Peter Lieven |
Subject: |
Re: [Qemu-ppc] broken incoming migration |
Date: |
Tue, 4 Jun 2013 21:15:20 +0200 |
Am 04.06.2013 um 17:17 schrieb Paolo Bonzini <address@hidden>:
> Il 04/06/2013 16:48, Peter Lieven ha scritto:
>> Still using 3.2, but strange enough the above example is also not
>> increasing RSS size for me.
>>
>> Can you try the following:
>> qemu git master with 1G of memory (hanging in bios with no boot device)
>> and migrate it. Before migration RSS Size os somewhat
>> around 16MB. After migration its RSS size is in the order of 1G.
>
> That may be a kernel bug. The kernel did not do the copy-on-write trick
> on huge zero pages. It was fixed last year, maybe 3.2 is not enough.
> Try adding a MADV_HUGEPAGE madvise to the testcase and see if it reproduces.
that's it. thanks for the pointer. the huge zero page was introduced in 3.8.
paolo, alexey: can you please verify the following works for you:
https://github.com/plieven/qemu/tree/fix-migration
thanks
peter
>
> Paolo
>
- Re: [Qemu-ppc] broken incoming migration, Alexey Kardashevskiy, 2013/06/03
- Re: [Qemu-ppc] broken incoming migration, Peter Lieven, 2013/06/04
- Re: [Qemu-ppc] broken incoming migration, Paolo Bonzini, 2013/06/04
- Re: [Qemu-ppc] broken incoming migration, Peter Lieven, 2013/06/04
- Re: [Qemu-ppc] broken incoming migration, Paolo Bonzini, 2013/06/04
- Re: [Qemu-ppc] broken incoming migration, Peter Lieven, 2013/06/04
- Re: [Qemu-ppc] broken incoming migration, Paolo Bonzini, 2013/06/04
- Re: [Qemu-ppc] broken incoming migration,
Peter Lieven <=
- Re: [Qemu-ppc] broken incoming migration, Alexey Kardashevskiy, 2013/06/04
- Re: [Qemu-ppc] broken incoming migration, Peter Lieven, 2013/06/05
- Re: [Qemu-ppc] [Qemu-devel] broken incoming migration, liu ping fan, 2013/06/09
- Re: [Qemu-ppc] [Qemu-devel] broken incoming migration, Peter Lieven, 2013/06/09
- Re: [Qemu-ppc] broken incoming migration, Peter Lieven, 2013/06/04
- Re: [Qemu-ppc] [Qemu-devel] broken incoming migration, Wenchao Xia, 2013/06/08
- Re: [Qemu-ppc] [Qemu-devel] broken incoming migration, Alexey Kardashevskiy, 2013/06/08
- Re: [Qemu-ppc] [Qemu-devel] broken incoming migration, Wenchao Xia, 2013/06/08
- Re: [Qemu-ppc] [Qemu-devel] broken incoming migration, Alexey Kardashevskiy, 2013/06/08
- Re: [Qemu-ppc] [Qemu-devel] broken incoming migration, Benjamin Herrenschmidt, 2013/06/08