[Bug 32312] New: openvg "lion" demo freezes the system & lockup GPU with r600g

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=32312

           Summary: openvg "lion" demo freezes the system & lockup GPU
                    with r600g
           Product: Mesa
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: virtuousfox at gmail.com


in time of bug #30684 r600g were giving poor performance with "lion" demo
(about ~30 fps on my system) but not long ago i've noticed big, x10 time
speedup (up to ~350 fps). however, it was not for long: with
783e7caadf945f176cb297b8791769e2855fc9ef revision launching "lion" demo on my
system results in
1) video system freeze
2) 100% CPU time usage on all cores and total system freeze up if i not act
quickly and not kill demo process via ssh fast

if killed in time - all goes back to normal, in exception of
launching gles1gears demo right after which results in same behaviour.
however, repeated launch of gles1gears results in working demo but with some
artefacts.
third launch is all ok.

i'm pretty sure that regression was introduced in r600g in last 48 ~hours (same
revision but with r300g work ok) but i haven't done bisect.

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