From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Gerd Hoffmann <kraxel@suse.de>
Cc: Virtualization Mailing List <virtualization@lists.osdl.org>
Subject: Re: Oops
Date: Thu, 11 Jan 2007 11:56:18 -0800 [thread overview]
Message-ID: <45A69662.8000008@goop.org> (raw)
In-Reply-To: <45A645C3.2060802@suse.de>
Gerd Hoffmann wrote:
> Didn't try (yet), but I don't think so. It's not the pgd which is
> broken, but the pmd. And I think this way:
>
> (1) pmd is created
> (2) pmd is taken out of the slabcache and used for the kernel/xen
> address space (i.e. slot-3 in the PAE pgd).
> (3) xen fills in the page table entries for the hypervisor hole
> (4) pmd released and put back into the slab cache.
> (5) pmd gets reused, but for userspace addresses this time (pgd
> slot 0-2).
> (6) xen_pin() finds the stale entries for the hypervisor hole
> ==> Oops.
Ah, right.
J
next prev parent reply other threads:[~2007-01-11 19:56 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-09 13:34 Oops Gerd Hoffmann
2007-01-09 22:46 ` Oops Jeremy Fitzhardinge
2007-01-10 8:16 ` Oops Gerd Hoffmann
2007-01-10 10:29 ` Oops Gerd Hoffmann
2007-01-10 13:05 ` Oops Gerd Hoffmann
2007-01-10 20:07 ` Oops Jeremy Fitzhardinge
2007-01-10 23:52 ` Oops Chris Wright
2007-01-10 23:53 ` Oops Jeremy Fitzhardinge
2007-01-11 8:13 ` Oops Gerd Hoffmann
2007-01-11 8:11 ` Oops Gerd Hoffmann
2007-01-11 15:45 ` Oops Gerd Hoffmann
2007-01-11 17:41 ` Oops Chris Wright
2007-01-12 8:24 ` Oops Gerd Hoffmann
2007-01-12 2:53 ` Oops Rusty Russell
2007-01-12 4:23 ` Oops Chris Wright
2007-01-12 8:31 ` Oops Gerd Hoffmann
2007-01-10 20:06 ` Oops Jeremy Fitzhardinge
2007-01-10 21:44 ` Oops Jeremy Fitzhardinge
2007-01-11 14:12 ` Oops Gerd Hoffmann
2007-01-11 19:56 ` Jeremy Fitzhardinge [this message]
2007-01-10 19:38 ` Oops Jeremy Fitzhardinge
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