<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [HSW] GPU hang on ctx load" href="https://bugs.freedesktop.org/show_bug.cgi?id=83677#c30">Comment # 30</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [HSW] GPU hang on ctx load" href="https://bugs.freedesktop.org/show_bug.cgi?id=83677">bug 83677</a> from <a class="email" href="mailto:simon@farnz.org.uk" title="Simon Farnsworth <simon@farnz.org.uk>"> Simon Farnsworth</a> <pre>(In reply to <a href="show_bug.cgi?id=83677#c28">comment #28</a>) > Could you get drm.debug=7 dmesg for the BUG()? I don't it will give anything > else, but maybe it will have a nugget of gold in there. Best would slub > debug=y (use-after-free checks) or even kmemcheck. I've turned on slub debug, but drm.debug=7 dmesg flows too fast to send over netconsole, with lots of repeats of: [ 164.320029] [drm:legacy_ringbuffer_submission] UXA submitting garbage DR4, fixing up [ 164.320055] [drm:drm_ioctl] pid=888, dev=0xe200, auth=1, I915_GEM_BUSY [ 164.320056] [drm:drm_ioctl] pid=888, dev=0xe200, auth=1, I915_GEM_MADVISE [ 164.320060] [drm:drm_ioctl] pid=888, dev=0xe200, auth=1, I915_GEM_MADVISE [ 164.320062] [drm:drm_ioctl] pid=888, dev=0xe200, auth=1, I915_GEM_PWRITE [ 164.320064] [drm:drm_ioctl] pid=888, dev=0xe200, auth=1, I915_GEM_PWRITE [ 164.320066] [drm:drm_ioctl] pid=888, dev=0xe200, auth=1, I915_GEM_BUSY [ 164.320067] [drm:drm_ioctl] pid=888, dev=0xe200, auth=1, I915_GEM_MADVISE [ 164.320069] [drm:drm_ioctl] pid=888, dev=0xe200, auth=1, I915_GEM_PWRITE [ 164.320071] [drm:drm_ioctl] pid=888, dev=0xe200, auth=1, I915_GEM_EXECBUFFER2 If I hit the BUG() again, I'll give you whatever I can get.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>