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

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 18.11.13 at 14:24, Daniel Kiper <daniel.kiper@xxxxxxxxxx> wrote:
> 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?

Sorry, I don't understand the question.

> 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.

Are you taking of a size limit or an address one?

> Additionally, it should not overlap with Xen code and/or structures.

That's being guaranteed already afaict.

Jan


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