From: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
To: Alex Williamson
<alex.williamson-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: Meelis Roos <mroos-Y27EyoLml9s@public.gmane.org>,
David Woodhouse <dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
Linux Kernel list
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: IOMMU+DMAR causing NMIs-s
Date: Thu, 14 Jul 2016 10:31:06 +0200 [thread overview]
Message-ID: <20160714083106.GQ12639@8bytes.org> (raw)
In-Reply-To: <20160713170408.6e5d2534-1yVPhWWZRC1BDLzU/O5InQ@public.gmane.org>
On Wed, Jul 13, 2016 at 05:04:08PM -0600, Alex Williamson wrote:
> With hpwdt disabled, can you reboot a few times and look for DMAR
> faults in the dmesg to see if they're all consistent, ie. device 1e.0
> doing a read from 0xb000? Is there any correlation to radeon hanging
> and one of those DMAR faults appearing in the log (you can make use of
> the iLO for a serial console so you can record more of the boot than
> what can be captured on the VGA console). Also, this should be an
> X58-based system, which reminds me of Joerg's recent commit
> a4c34ff1c029 that's intended to fix a hang on such systems. That was
> included starting in v4.7-rc4, so if this is a new issue, testing
> before and after that commit might be relevant. Thanks,
That commit fixed a hang while the IOMMU is being initialized. This hang
is different, as the IOMMU already runs. So I doubt that it fixes this
problem, but it is worth a test, of course.
Joerg
WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro@8bytes.org>
To: Alex Williamson <alex.williamson@redhat.com>
Cc: Meelis Roos <mroos@linux.ee>,
Linda Knippers <linda.knippers@hpe.com>,
David Woodhouse <dwmw2@infradead.org>,
iommu@lists.linux-foundation.org,
Linux Kernel list <linux-kernel@vger.kernel.org>
Subject: Re: IOMMU+DMAR causing NMIs-s
Date: Thu, 14 Jul 2016 10:31:06 +0200 [thread overview]
Message-ID: <20160714083106.GQ12639@8bytes.org> (raw)
In-Reply-To: <20160713170408.6e5d2534@t450s.home>
On Wed, Jul 13, 2016 at 05:04:08PM -0600, Alex Williamson wrote:
> With hpwdt disabled, can you reboot a few times and look for DMAR
> faults in the dmesg to see if they're all consistent, ie. device 1e.0
> doing a read from 0xb000? Is there any correlation to radeon hanging
> and one of those DMAR faults appearing in the log (you can make use of
> the iLO for a serial console so you can record more of the boot than
> what can be captured on the VGA console). Also, this should be an
> X58-based system, which reminds me of Joerg's recent commit
> a4c34ff1c029 that's intended to fix a hang on such systems. That was
> included starting in v4.7-rc4, so if this is a new issue, testing
> before and after that commit might be relevant. Thanks,
That commit fixed a hang while the IOMMU is being initialized. This hang
is different, as the IOMMU already runs. So I doubt that it fixes this
problem, but it is worth a test, of course.
Joerg
next prev parent reply other threads:[~2016-07-14 8:31 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-12 12:05 4.7-rc6: NMI in intel_idle on HP Proliant G6 Meelis Roos
2016-07-12 12:27 ` Meelis Roos
2016-07-12 12:40 ` Rafael J. Wysocki
2016-07-12 14:22 ` Meelis Roos
2016-07-13 7:17 ` IOMMU+DMAR causing NMIs-s (was: 4.7-rc6: NMI in intel_idle on HP Proliant G6) Meelis Roos
[not found] ` <alpine.LRH.2.20.1607130855210.11080-ptEonEWSGqKptlylMvRsHA@public.gmane.org>
2016-07-13 8:18 ` Joerg Roedel
2016-07-13 8:18 ` Joerg Roedel
[not found] ` <20160713081817.GJ12639-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2016-07-13 8:31 ` Meelis Roos
2016-07-13 8:31 ` Meelis Roos
[not found] ` <alpine.LRH.2.20.1607131122010.20366-ptEonEWSGqKptlylMvRsHA@public.gmane.org>
2016-07-13 9:03 ` Joerg Roedel
2016-07-13 9:03 ` Joerg Roedel
[not found] ` <20160713090332.GK12639-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2016-07-13 9:16 ` Meelis Roos
2016-07-13 9:16 ` Meelis Roos
[not found] ` <alpine.LRH.2.20.1607131206430.20366-ptEonEWSGqKptlylMvRsHA@public.gmane.org>
2016-07-13 9:43 ` Joerg Roedel
2016-07-13 9:43 ` Joerg Roedel
2016-07-13 9:40 ` Meelis Roos
2016-07-13 9:40 ` Meelis Roos
[not found] ` <alpine.LRH.2.20.1607131239410.20366-ptEonEWSGqKptlylMvRsHA@public.gmane.org>
2016-07-13 9:49 ` Joerg Roedel
2016-07-13 9:49 ` Joerg Roedel
[not found] ` <20160713094917.GM12639-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2016-07-13 9:58 ` Meelis Roos
2016-07-13 9:58 ` Meelis Roos
[not found] ` <alpine.LRH.2.20.1607131257390.20366-ptEonEWSGqKptlylMvRsHA@public.gmane.org>
2016-07-13 10:18 ` Joerg Roedel
2016-07-13 10:18 ` Joerg Roedel
[not found] ` <20160713101859.GO12639-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2016-07-13 14:48 ` Alex Williamson
2016-07-13 14:48 ` Alex Williamson
[not found] ` <20160713084830.09453584-1yVPhWWZRC1BDLzU/O5InQ@public.gmane.org>
2016-07-13 15:13 ` IOMMU+DMAR causing NMIs-s Linda Knippers
2016-07-13 15:13 ` Linda Knippers
[not found] ` <1a4c4b65-c716-08a5-af89-1b0f551024ed-ZPxbGqLxI0U@public.gmane.org>
2016-07-13 21:52 ` Meelis Roos
2016-07-13 21:52 ` Meelis Roos
[not found] ` <alpine.LRH.2.20.1607132258001.30020-ptEonEWSGqKptlylMvRsHA@public.gmane.org>
2016-07-13 23:04 ` Alex Williamson
2016-07-13 23:04 ` Alex Williamson
[not found] ` <20160713170408.6e5d2534-1yVPhWWZRC1BDLzU/O5InQ@public.gmane.org>
2016-07-14 8:31 ` Joerg Roedel [this message]
2016-07-14 8:31 ` Joerg Roedel
2016-08-24 8:19 ` Meelis Roos
2016-08-24 8:19 ` Meelis Roos
2016-07-13 13:52 ` IOMMU+DMAR causing NMIs-s (was: 4.7-rc6: NMI in intel_idle on HP Proliant G6) Henrique de Moraes Holschuh
2016-07-13 7:21 ` 4.7-rc6: NMI in intel_idle on HP Proliant G6 Meelis Roos
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