From: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
To: Christian Kujau <lists@nerdbynature.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Zhenyu Wang <zhenyuw@linux.intel.com>,
LKML <linux-kernel@vger.kernel.org>,
David.Woodhouse@intel.com, dwmw2@infradead.org, eric@anholt.net,
ben@decadent.org.uk, gregkh@suse.de
Subject: Re: [PATCH] intel-agp.c: Fix crash when accessing nonexistent GTT entries in i915
Date: Tue, 23 Mar 2010 12:40:05 +0100 [thread overview]
Message-ID: <ca2dc2821003230440w3d96612aja0d4e083d3cc8c02@mail.gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.01.1003222111070.5493@bogon.housecafe.de>
On Tue, Mar 23, 2010 at 5:14 AM, Christian Kujau <lists@nerdbynature.de> wrote:
> On Mon, 22 Mar 2010 at 20:57, Andrew Morton wrote:
>> On Sun, 21 Mar 2010 16:30:20 +0100 Miguel Ojeda <miguel.ojeda.sandonis@gmail.com> wrote:
>> > I bisected in order to find the commit 5877960869333e42ebeb733e8d9d5630ff96d350.
>
> I believe this[0] is fc61901373987ad61851ed001fe971f3ee8d96a3 upstream:
Indeed. Also in
http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.32.y.git;a=commit;h=fc61901373987ad61851ed001fe971f3ee8d96a3
>
> --------
> agp/intel-agp: Clear entire GTT on startup
>
> Some BIOSes fail to initialise the GTT, which will cause DMA faults when
> the IOMMU is enabled. We need to clear the whole thing to point at the
> scratch page, not just the part that Linux is going to use.
>
> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
> [anholt: Note that this may also help with stability in the presence of
> driver bugs, by not drawing to memory we don't own]
> Signed-off-by: Eric Anholt <eric@anholt.net>
> --------
>
> Christian.
>
> [0] http://github.com/pfactum/pf-kernel/commit/5877960869333e42ebeb733e8d9d5630ff96d350
> --
> BOFH excuse #384:
>
> it's an ID-10-T error
>
next prev parent reply other threads:[~2010-03-23 11:40 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-10 22:09 Miguel Ojeda
2010-03-11 7:31 ` Miguel Ojeda
2010-03-11 8:34 ` Zhenyu Wang
2010-03-11 15:54 ` Miguel Ojeda
2010-03-19 20:27 ` Andrew Morton
2010-03-20 13:04 ` Miguel Ojeda
2010-03-21 13:58 ` Zhenyu Wang
2010-03-21 15:30 ` Miguel Ojeda
2010-03-23 0:57 ` Andrew Morton
2010-03-23 4:14 ` Christian Kujau
2010-03-23 11:40 ` Miguel Ojeda [this message]
2010-03-24 18:14 ` Andrew Morton
2010-03-24 19:07 ` Miguel Ojeda
2010-03-25 16:55 ` Miguel Ojeda
2010-04-27 17:57 ` Andrew Morton
2010-04-27 20:06 ` Miguel Ojeda
2010-04-27 20:26 ` Andrew Morton
2010-04-27 21:07 ` Miguel Ojeda
2010-03-23 10:02 ` Miguel Ojeda
2010-04-28 7:49 ` Dave Airlie
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