Re: io_page_fault seen in normal kernel boot log

From	Joerg Roedel <joro@8bytes.org>
Newsgroups	linux.kernel
Subject	Re: io_page_fault seen in normal kernel boot log
Date	2016-09-05 12:00 +0200
Message-ID	<sdYR6-209-59@gated-at.bofh.it> (permalink)
References	<sdUNs-7TE-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Hi Baoquan

On Mon, Sep 05, 2016 at 01:38:05PM +0800, Baoquan He wrote:
> This happened on 4.8.0-rc5
> 
> [  +0.006771] AMD-Vi: Event logged [IO_PAGE_FAULT device=00:14.4 domain=0x0009 address=0x0000000000001000 flags=0x0000]
> [  +0.010593] AMD-Vi: Event logged [IO_PAGE_FAULT device=00:14.4 domain=0x0009 address=0x0000000000001040 flags=0x0000]
> [  +0.010596] AMD-Vi: Event logged [IO_PAGE_FAULT device=00:14.4 domain=0x0009 address=0x0000000000001080 flags=0x0000]
> [  +0.010597] AMD-Vi: Event logged [IO_PAGE_FAULT device=00:14.4 domain=0x0009 address=0x00000000000010c0 flags=0x0000]
> [  +0.010592] AMD-Vi: Event logged [IO_PAGE_FAULT device=00:14.4 domain=0x0009 address=0x0000000000001100 flags=0x0000]
> [  +0.010592] AMD-Vi: Event logged [IO_PAGE_FAULT device=00:14.4 domain=0x0009 address=0x0000000000001140 flags=0x0000]

This is probably a radeon driver issue, the address looks like its
handed out by the IOMMU driver, so probably a use-after-free bug. I also
see those GPU related faults from time to time. The system usually boots
fine anyway. Does boot complete on that system?


Regards,

	Joerg

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Re: io_page_fault seen in normal kernel boot log Joerg Roedel <joro@8bytes.org> - 2016-09-05 12:00 +0200
  Re: io_page_fault seen in normal kernel boot log Baoquan He <bhe@redhat.com> - 2016-09-05 12:20 +0200
    Re: io_page_fault seen in normal kernel boot log Joerg Roedel <joro@8bytes.org> - 2016-09-06 11:20 +0200
      Re: io_page_fault seen in normal kernel boot log Baoquan He <bhe@redhat.com> - 2016-09-09 10:10 +0200
        Re: io_page_fault seen in normal kernel boot log Joerg Roedel <joro@8bytes.org> - 2016-09-09 10:40 +0200
          Re: io_page_fault seen in normal kernel boot log Baoquan He <bhe@redhat.com> - 2016-09-09 10:50 +0200

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