[Bug 30374] New: ums 3D lock since drm: kill kernel_context_switch callbacks 1da3f87ebb7edb3e0b829ec4bbe5fb3d9d93986f

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=30374

           Summary: ums 3D lock since drm: kill kernel_context_switch
                    callbacks 1da3f87ebb7edb3e0b829ec4bbe5fb3d9d93986f
           Product: Mesa
           Version: git
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/R600
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: lists at andyfurniss.entadsl.com


git d-r-t, mesa, ddx and xserver. rv790 PCIE card.

UMS radeon/r600c with current d-r-t soft locks when a mesa demo is run.

Log shows many

[drm:drm_lock_take] *ERROR* 1 holds heavyweight lock

bisect came up with

1da3f87ebb7edb3e0b829ec4bbe5fb3d9d93986f is first bad commit
commit 1da3f87ebb7edb3e0b829ec4bbe5fb3d9d93986f
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Mon Aug 23 22:53:24 2010 +0200

    drm: kill kernel_context_switch callbacks

    Not used by any in-kernel driver. So drop it.

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