Messages in this thread | | | Date | Thu, 14 Jul 2016 10:31:06 +0200 | From | Joerg Roedel <> | Subject | Re: IOMMU+DMAR causing NMIs-s |
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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
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