From: Malcolm Crossley <malcolm.crossley@citrix.com>
To: Jan Beulich <JBeulich@suse.com>,
Daniel Kiper <daniel.kiper@oracle.com>,
Juergen Gross <JGross@suse.com>
Cc: <olaf@aepfle.de>, <keir@xen.org>, <andrew.cooper3@citrix.com>,
<ptesarik@suse.cz>, <linux-kernel@vger.kernel.org>,
<dslutz@verizon.com>, <anderson@redhat.com>,
<david.vrabel@citrix.com>, David Mair <DMAIR@suse.com>,
<xen-devel@lists.xenproject.org>, <boris.ostrovsky@oracle.com>,
<crash-utility@redhat.com>
Subject: Re: [Xen-devel] crash tool - problem with new Xen linear virtual mapped sparse p2m list
Date: Tue, 24 Nov 2015 09:55:30 +0000 [thread overview]
Message-ID: <56543412.7090104@citrix.com> (raw)
In-Reply-To: <565434F102000078000B8424@prv-mh.provo.novell.com>
On 24/11/15 08:59, Jan Beulich wrote:
>>>> On 24.11.15 at 07:55, <JGross@suse.com> wrote:
>> What about:
>>
>> 4) Instead of relying on the kernel maintained p2m list for m2p
>> conversion use the hypervisor maintained m2p list which should be
>> available in the dump as well. This is the way the alive kernel is
>> working, so mimic it during crash dump analysis.
>
> I fully agree; I have to admit that looking at the p2m when doing page
> table walks for a PV Dom0 (having all machine addresses in page table
> entries) seems kind of backwards. (But I say this knowing nothing
> about the tool.)
>
I don't think we can reliably use the m2p for PV domains because
PV domains don't always issue a m2p update hypercall when they change
their p2m mapping.
Malcolm
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel
>
next prev parent reply other threads:[~2015-11-24 9:55 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-23 20:18 crash tool - problem with new Xen linear virtual mapped sparse p2m list Daniel Kiper
2015-11-24 6:55 ` Juergen Gross
2015-11-24 8:59 ` Jan Beulich
2015-11-24 9:55 ` Malcolm Crossley [this message]
2015-11-24 10:09 ` David Vrabel
2015-11-24 10:09 ` [Xen-devel] " David Vrabel
2015-11-24 10:17 ` Petr Tesarik
2015-11-24 10:35 ` Andrew Cooper
2015-11-24 10:35 ` [Xen-devel] " Andrew Cooper
2015-11-24 12:57 ` Petr Tesarik
2015-11-24 13:39 ` Jan Beulich
2015-11-24 13:39 ` [Xen-devel] " Jan Beulich
2015-11-24 13:41 ` Andrew Cooper
2015-11-24 13:41 ` [Xen-devel] " Andrew Cooper
2015-11-24 13:42 ` Andrew Cooper
2015-11-24 13:42 ` [Xen-devel] " Andrew Cooper
2015-11-24 12:57 ` Petr Tesarik
2015-11-24 13:46 ` Ian Campbell
2015-11-24 13:46 ` [Xen-devel] " Ian Campbell
2015-11-24 13:55 ` Jan Beulich
2015-11-24 13:55 ` Jan Beulich
2015-11-24 10:17 ` Petr Tesarik
2015-11-24 9:55 ` Malcolm Crossley
2015-11-24 8:59 ` Jan Beulich
2015-11-24 6:55 ` Juergen Gross
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