[Bug 59089] New: [bisected, regression] flood of GPU fault detected in logs caused by 9af20... drm/radeon: fix fence locking in the pageflip callback

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=59089

          Priority: medium
            Bug ID: 59089
          Assignee: dri-devel at lists.freedesktop.org
           Summary: [bisected, regression] flood of GPU fault detected in
                    logs caused by 9af20... drm/radeon: fix fence locking
                    in the pageflip callback
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: alexandre.f.demers at gmail.com
          Hardware: All
            Status: NEW
           Version: git
         Component: Drivers/Gallium/r600
           Product: Mesa

GPU fault detected flood in logs (dmesg, kernel, errors and everything) of the
following form:
[  533.928472] radeon 0000:03:00.0: GPU fault detected: 146 0x00335514
[  533.928477] radeon 0000:03:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR  
0x00000000
[  533.928483] radeon 0000:03:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS
0x00000000

>From time to time, there will be an address value different from 0x00000000.
They are produced at an awful rate, producing GB of logs in no time.

Appeared in kernel 3.8.0-rcX using a cayman GPU (HD 6950).

Bisecting to identify when the flood first appeared points at:
Commit: 4ac0533abaec2b83a7f2c675010eedd55664bc26

Author: Jerome Glisse <jglisse at redhat.com>  2012-12-13 12:08:11
Committer: Alex Deucher <alexander.deucher at amd.com>  2012-12-14 10:45:24
Parent: 9af20792124850369e764965690b99b20623dfc4 (drm/radeon: fix fence locking
in the pageflip callback)
Branch: remotes/origin/master
Follows: v3.7-rc7
Precedes: v3.8-rc1

    drm/radeon: fix htile buffer size computation for command stream checker

    Fix the size computation of the htile buffer.

    Signed-off-by: Jerome Glisse <jglisse at redhat.com>
    Signed-off-by: Alex Deucher <alexander.deucher at amd.com>

Maybe be related to some of the crashes seen in bug 58667.

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