[Bug 31530] New: r600g: GPU hangs and segfaults with piglit (Regression)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=31530

           Summary: r600g: GPU hangs and segfaults with piglit
                    (Regression)
           Product: Mesa
           Version: git
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: monraaf at gmail.com


Created an attachment (id=40180)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=40180)
part of backtrace of fbo-blit-d24s8

With latest git master I see a lot of piglit tests segfault and also some more
GPU hangs. e.g. fbo-blit-d24s8 segfaults and fbo-readpixels now hangs the GPU.

git bisect says:

63c3e3a3dc73f8a72e0d08ac4453df57bccdfdb9 is the first bad commit
commit 63c3e3a3dc73f8a72e0d08ac4453df57bccdfdb9
Author: Keith Whitwell <keithw at vmware.com>
Date:   Tue Nov 9 20:08:45 2010 +0000

    r600: fix my pessimism about PIPE_TRANSFER_x flags

    For some reason I though we needed the _DISCARD flag to avoid
    readbacks, which isn't true at all.  Now write operations should
    pipeline properly, gives a good speedup to demos/tunnel.

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