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xen-devel
Re: [Xen-devel] Possible shadow bug
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To: |
Igor Mammedov <imammedo@xxxxxxxxxx> |
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Subject: |
Re: [Xen-devel] Possible shadow bug |
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From: |
Tim Deegan <Tim.Deegan@xxxxxxxxxx> |
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Date: |
Fri, 10 Jun 2011 11:10:11 +0100 |
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Cc: |
Stefano@xxxxxxxxxxxxxx, Paul Menage <menage@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Keir Fraser <keir@xxxxxxx>, Stabellini <stefano.stabellini@xxxxxxxxxxxxx>, "containers@xxxxxxxxxxxxxxxxxxxxxxxxxx" <containers@xxxxxxxxxxxxxxxxxxxxxxxxxx>, Li Zefan <lizf@xxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxx>, "linux-mm@xxxxxxxxx" <linux-mm@xxxxxxxxx>, Keir Fraser <keir.xen@xxxxxxxxx>, "akpm@xxxxxxxxxxxxxxxxxxxx" <akpm@xxxxxxxxxxxxxxxxxxxx>, "balbir@xxxxxxxxxxxxxxxxxx" <balbir@xxxxxxxxxxxxxxxxxx>, KAMEZAWA@xxxxxxxxxxxxxx, Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>, Hiroyuki Kamezawa <kamezawa.hiroyuki@xxxxxxxxx> |
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Fri, 10 Jun 2011 03:11:18 -0700 |
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<BANLkTimbqHPeUdue=_Z31KVdPwcXtbLpeg@xxxxxxxxxxxxxx> <4DE8D50F.1090406@xxxxxxxxxx> <BANLkTinMamg_qesEffGxKu3QkT=zyQ2MRQ@xxxxxxxxxxxxxx> <4DEE26E7.2060201@xxxxxxxxxx> <20110608123527.479e6991.kamezawa.hiroyu@xxxxxxxxxxxxxx> <4DF0801F.9050908@xxxxxxxxxx> <alpine.DEB.2.00.1106091311530.12963@kaball-desktop> <20110609150133.GF5098@xxxxxxxxxxxxxxxxxxxxxxx> <4DF0F90D.4010900@xxxxxxxxxx> <20110610100139.GG5098@xxxxxxxxxxxxxxxxxxxxxxx> |
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Mutt/1.5.21 (2010-09-15) |
At 11:01 +0100 on 10 Jun (1307703699), Tim Deegan wrote:
> Actually, looking at the disassembly you posted, it looks more like it
> might be an emulator bug in Xen; if Xen finds itself emulating the IMUL
> instruction and either gets the logic wrong or does the memory access
> wrong, it could cause that failure. And one reason that Xen emulates
> instructions is if the memory operand is on a pagetable that's shadowed
> (which might be a page that was recently a pagetable).
>
> ISTR that even though the RHEL xen reports a 3.0.x version it has quite
> a lot of backports in it. Does it have this patch?
> http://hg.uk.xensource.com/xen-3.1-testing.hg/rev/e8fca4c42d05
Oops, that URL doesn't work; I meant this:
http://xenbits.xen.org/xen-3.1-testing.hg/rev/e8fca4c42d05
Tim.
--
Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, Xen Platform Team
Citrix Systems UK Ltd. (Company #02937203, SL9 0BG)
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