From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Mark McLoughlin <markmc@redhat.com>
Cc: linux-kernel@vger.kernel.org, mingo@elte.hu,
xen-devel@lists.xensource.com
Subject: Re: [PATCH 0/3] xen: Fix oops when mapping/unmapping addr above 1Gb
Date: Fri, 28 Mar 2008 11:02:34 -0700 [thread overview]
Message-ID: <47ED32BA.1070008@goop.org> (raw)
In-Reply-To: <1206722297-11763-1-git-send-email-markmc@redhat.com>
Mark McLoughlin wrote:
> Hi,
> In Fedora rawhide we're currently seeing oopses whenever
> a processes dlopen()s a library which prelink() has previously
> relocated above 1Gb. Some more details at:
>
> https://bugzilla.redhat.com/436453
>
> The issue seems to be that during xen_pgd_pin(), we only
> pin PTE pages, but xen's release_pmd() tries to unpin PMD pages
> too.
>
> The following series of patches is against the latest
> x86 tree.
>
Hm, OK. I'm trying to work out what happened here. I guess its a
latent bug which is only visible now that its possible to incrementally
free pmds.
A side note is that I'm planning on pinning pmds in the future, so that
we can get away replace the full pgd page per mm with a pgd page per cpu.
J
next prev parent reply other threads:[~2008-03-28 18:03 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-28 16:38 [PATCH 0/3] xen: Fix oops when mapping/unmapping addr above 1Gb Mark McLoughlin
2008-03-28 16:38 ` [PATCH 1/3] xen: Refactor xen_{alloc,release}_{pte,pmd}() Mark McLoughlin
2008-03-28 16:38 ` [PATCH 2/3] xen: Do not pin/unpin PMD pages Mark McLoughlin
2008-03-28 16:38 ` [PATCH 3/3] xen: Clear PG_pinned in release_{pte,pmd}() Mark McLoughlin
2008-03-28 18:02 ` Jeremy Fitzhardinge [this message]
2008-03-31 13:14 ` [PATCH 0/3] xen: Fix oops when mapping/unmapping addr above 1Gb Ingo Molnar
2008-03-31 14:55 ` Jeremy Fitzhardinge
2008-04-02 14:35 ` Mark McLoughlin
2008-04-02 14:36 ` [PATCH 1/3] xen: Refactor xen_{alloc,release}_{pt,pd}() Mark McLoughlin
2008-04-02 14:36 ` [PATCH 2/3] xen: Do not pin/unpin PMD pages Mark McLoughlin
2008-04-02 14:36 ` [PATCH 3/3] xen: Clear PG_pinned in release_{pt,pd}() Mark McLoughlin
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