[Bug 81391] New: nouveau E[ PFIFO][0000:01:00.0] read fault at 0x000020f000 [PTE] from BAR1/HOST_CPU on channel 0x00ffbdf000 [unknown]

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=81391

            Bug ID: 81391
           Summary: nouveau E[   PFIFO][0000:01:00.0] read fault at
                    0x000020f000 [PTE] from BAR1/HOST_CPU on channel
                    0x00ffbdf000 [unknown]
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.16.0-rc7
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: linux.bug.reporting at gmail.com
        Regression: No

Created attachment 144731
  --> https://bugzilla.kernel.org/attachment.cgi?id=144731&action=edit
kernel boot up messages extracted from syslog (/var/log/messages)

The error message displayed on the subject line floods the kernel log buffer:
nouveau E[   PFIFO][0000:01:00.0] read fault at 0x000020f000 [PTE] from
BAR1/HOST_CPU on channel 0x00ffbdf000 [unknown]
...
[   33.807019] systemd-journald[550]: /dev/kmsg buffer overrun, some messages
lost.

All of the useful messages I could extract out of syslog (/var/log/messages)
based on the kernel boot up time stamp is attached to this report.

I've also provided lspci -vvv & my .config as well.

I was however pleasantly surprised that the X.org & KDE did come up & appear to
be functioning fine, even including glxgears running smoothly as well.

Thank you for progressing Nouveau so far, so quickly & so nicely. And am happy
to test any patch you may want me to.

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