lkml.org 
[lkml]   [2008]   [Feb]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 2.6.25-rc1 xen pvops regression
Jeremy Fitzhardinge wrote:
> H. Peter Anvin wrote:
>>> Still curious about why a pagetable page is ending up in that range
>>> though. Seems like it shouldn't be possible, since we shouldn't be
>>> allowed to allocate from those pages, at least until the DMI probe
>>> has happened... Unless the early allocator is only excluded from
>>> e820 reserved pages, which would cause a problem on systems which
>>> don't reserve the DMI space... HPA?
>>>
>>
>> I thought the problem was a Xen-provided pagetable from before Linux
>> started?
>
> Hm, I don't think so. The domain-builder pagetable is put after the
> kernel, so it shouldn't be under 1M.
>

That's weird, then. If we put a page table at 0xf0000, it would crash
hard on real hardware (there is ROM there); as I mentioned, I do have
hardware which both reserves and doesn't reserve this region.

-hpa


\
 
 \ /
  Last update: 2008-02-21 23:03    [W:0.101 / U:0.332 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site