Re: [Crash-utility] [Xen-devel] crash tool - problem with new Xen linear virtual mapped sparse p2m list
On 24/11/15 08:59, Jan Beulich wrote:
>>> On 24.11.15 at 07:55, <JGross(a)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
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