[Bug 34102] New: radeon drm/kms driver: please use suspend/hibernate notifiers for allocating memory in suspend routines

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=34102

           Summary: radeon drm/kms driver: please use suspend/hibernate
                    notifiers for allocating memory in suspend routines
           Product: Drivers
           Version: 2.5
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri at kernel-bugs.osdl.org
        ReportedBy: Martin at Lichtvoll.de
        Regression: Yes


I have the issue that since switching to Radeon KMS neither in-kernel-suspend
nor TuxOnIce - that I do not use anymore currently - hibernation aborts due to
lack of free memory when I have more than just 2-3 applications open although I
have 2 GB of RAM in my ThinkPad T42. For further details please see:

Bug #30482 -  try harder to free enough memory / improve image size autotuning

According to Rafael 

"The problem is a consequence of bugs in device drivers that shouldn't allocate
memory in their suspend/resume routines _at_ _all_.

So, a more fundamental fix would be to modify drivers so that they use
suspend/hibernate notifiers for allocating memory.  IOW, you should complain
to the developers of the drivers that cause problems to happen."

(see https://bugzilla.kernel.org/show_bug.cgi?id=30482#c7)

While I am not completely sure that it is the Radeon DRM/KMS driver allocating
memory additionally memory during hibernation cycle having this issue since
switching to KMS points at that.

Currently I am using 2.6.38.4 with gallium userspace:

martin at shambhala:~> glxinfo | grep OpenGL
OpenGL vendor string: X.Org R300 Project
OpenGL renderer string: Gallium 0.4 on ATI RV350
OpenGL version string: 2.1 Mesa 7.10.2
OpenGL shading language version string: 1.20
OpenGL extensions:

martin at shambhala:~> xdpyinfo | grep version
version number:    11.0
X.Org version: 1.10.1

but this happened with earlier versions as well.

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