Re: [Bug #37232] [3.0-rc1][NMI/DMAR][iwlagn] errors - PCI system error (SERR) for reason a1 on CPU 0

Shawn Starr
2011-06-27T23:37:34Z

On Sunday, June 26, 2011 11:23:44 PM Rafael J. Wysocki wrote:
> This message has been generated automatically as a part of a summary report
> of recent regressions.
>
> The following bug entry is on the current list of known regressions
> from 2.6.39. Please verify if it still should be listed and let the
> tracking team know (either way).
>
This continues in -rc4, although Fedora has a patch to try to fix some DMAR
errors, it doesn't seem to work for me.

03:00.0 Network controller: Intel Corporation PRO/Wireless 5100 AGN [Shiloh]
Network Connection

[ 1046.002195] DMAR:[DMA Write] Request device [03:00.0] fault addr ffda6000
[ 1046.002198] DMAR:[fault reason 05] PTE Write access is not set
[ 1048.189224] DRHD: handling fault status reg 2
[ 1048.189240] DMAR:[DMA Write] Request device [03:00.0] fault addr ffd94000
[ 1048.189244] DMAR:[fault reason 05] PTE Write access is not set

$ uname -a
Linux segfault.sh0n.net 3.0-0.rc4.git0.2.fc16.x86_64 #1 SMP Wed Jun 22
16:27:16 UTC 2011 x86_64 x86_64 x

Perhaps someone from Intel can comment on why this broke recently? It's not
causing me issues, just noise in logs/dmesg.

>
> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=37232
> Subject : [3.0-rc1][NMI/DMAR][iwlagn] errors - PCI system error (SERR)
for
> reason a1 on CPU 0 Submitter : Shawn Starr <shawn.starr-bJEeYj9oJeDQT0dZR+AlfA@public.gmane.org>
> Date : 2011-06-03 4:56 (24 days old)
> Message-ID : <4478124.OuFNgaPiHS-RRHT56Q3PSMGBMjmSbuoWl6hYfS7NtTn@public.gmane.org>
> References : http://marc.info/?l=linux-kernel&m=130707737616116&w=2