From: Valdis.Kletnieks@vt.edu
To: Ingo Molnar <mingo@kernel.org>
Cc: "Li, Zhen-Hua" <zhen-hual@hp.com>, Joerg Roedel <joro@8bytes.org>,
David Woodhouse <dwmw2@infradead.org>,
linux-kernel@vger.kernel.org
Subject: Re: next-20130709 DMAR issues
Date: Tue, 16 Jul 2013 18:07:01 -0400 [thread overview]
Message-ID: <21949.1374012421@turing-police.cc.vt.edu> (raw)
In-Reply-To: Your message of "Fri, 12 Jul 2013 14:14:20 +0200." <20130712121419.GA22945@gmail.com>
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On Fri, 12 Jul 2013 14:14:20 +0200, Ingo Molnar said:
>
> (Cc:-ed a few DMAR people.)
Sorry for the slow reply, missed this in the lkml firehose.
For whatever reason, the damned problem seems to have evaporated:
% egrep -i 'dmar|Linux vers' /var/log/messages-20130714
....
Jul 11 18:54:15 turing-police kernel: [ 0.000000] Linux version 3.10.0-next-20130709 (valdis@turing-police.cc.vt.edu) (gcc version 4.8.1 20130612 (Red Hat 4.8.1-2) (GCC) ) #100 SMP PREEMPT Tue Jul 9 16:01:59 EDT 2013
Jul 11 18:54:15 turing-police kernel: [ 0.000000] ACPI: DMAR 00000000cb7fd298 00080 (v01 INTEL SNB 00000001 INTL 00000001)
Jul 11 18:54:15 turing-police kernel: [ 0.021632] dmar: Host address width 36
Jul 11 18:54:15 turing-police kernel: [ 0.021638] dmar: DRHD base: 0x000000fed90000 flags: 0x1
Jul 11 18:54:15 turing-police kernel: [ 0.021669] dmar: IOMMU 0: reg_base_addr fed90000 ver 1:0 cap c9008020660262 ecap f0105a
Jul 11 18:54:15 turing-police kernel: [ 0.021677] dmar: RMRR base: 0x000000ce761000 end: 0x000000ce780fff
Jul 11 18:54:15 turing-police kernel: [ 0.021775] dmar: DRHD: handling fault status reg 2
Jul 11 18:54:15 turing-police kernel: [ 0.021782] dmar: DMAR:[DMA Read] Request device [00:1f.2] fault addr ce71d000
Jul 11 18:54:15 turing-police kernel: [ 0.021782] DMAR:[fault reason 06] PTE Read access is not set
Jul 11 18:54:15 turing-police kernel: [ 1.002171] DMAR: No ATSR found
Jul 11 22:12:39 turing-police kernel: [ 0.000000] Linux version 3.10.0-next-20130709 (valdis@turing-police.cc.vt.edu) (gcc version 4.8.1 20130612 (Red Hat 4.8.1-2) (GCC) ) #100 SMP PREEMPT Tue Jul 9 16:01:59 EDT 2013
Jul 11 22:12:39 turing-police kernel: [ 0.000000] ACPI: DMAR 00000000cb7fd298 00080 (v01 INTEL SNB 00000001 INTL 00000001)
Jul 11 22:12:39 turing-police kernel: [ 0.021376] dmar: Host address width 36
Jul 11 22:12:39 turing-police kernel: [ 0.021382] dmar: DRHD base: 0x000000fed90000 flags: 0x1
Jul 11 22:12:39 turing-police kernel: [ 0.021414] dmar: IOMMU 0: reg_base_addr fed90000 ver 1:0 cap c9008020660262 ecap f0105a
Jul 11 22:12:39 turing-police kernel: [ 0.021422] dmar: RMRR base: 0x000000ce761000 end: 0x000000ce780fff
Jul 11 22:12:39 turing-police kernel: [ 1.034107] DMAR: No ATSR found
Damned if I know what changed - same kernel booted at 18:54 hit the issue, but
at 22:12 it had gone into hiding, and I haven't seen it since. (And the
laptop gets booted twice a day most days - once at arrival at office, and
once when I get home, and it had been doing it consistently at both locations
for several days.)
Definitely well into "things that go bump in the night" category.
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prev parent reply other threads:[~2013-07-16 22:08 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-10 17:01 Valdis Kletnieks
2013-07-12 12:14 ` Ingo Molnar
2013-07-12 14:31 ` Joerg Roedel
2013-07-15 2:32 ` Li, Zhen-Hua
2013-07-16 22:16 ` Valdis.Kletnieks
2013-07-16 22:07 ` Valdis.Kletnieks [this message]
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