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Re: [Xen-devel] [PATCHv11 3/9] kexec: add infrastructure for handling kexec images

On Mon, Nov 18, 2013 at 12:53:39PM +0000, Jan Beulich wrote:


> The issue is not a limit on mappable pages, but the fact that there's
> potentially no struct page_info for some or all of the crash area.

OK, are they allocated at boot time for whole system memory or just
for pages owned by Xen hypervsior? What about pages owned by domains?
As I can see we access crash region as it was owned by domain. AIUI,
it was done in that way because we wanted to be in line with normal
kexec case. However, I am not sure right know that this is good idea.
Maybe we should do something else in crash dump case?

We could establish an limit (4 GiB?) for crash region as a workaround.
Additionally, it should not overlap with Xen code and/or structures.


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