[Nouveau] [Bug 58615] [NV43] hangs with direct rendering since 3.7 rework

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=58615

--- Comment #13 from Andrew Randrianasulu <randrik at mail.ru> ---
I seems I  can avoid (workaround) this bug by simply changing in my .config
CONFIG_PREEMPT_NONE=y to CONFIG_PREEMPT_VOLUNTARY=y . I made  this  discovery 
while  trying  official Slackware kernel from Slackware-current. May be this
bug has something in  common with bug described  in
https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.3 as "mm, vmscan:
prevent kswapd livelock due to pfmemalloc-throttled process being killed' . 
Bug seems to hit  only nv40 (and less?) codepath, because my nv50 works fine
without preemption.

Should I  leave  this  bugreport open, or resolve it as WORKSFORME? (currently
I'm  compiling additional test kernel based on nouveau/linux-2.6 linux-3.19
branch , just  to test my workaround one more time.)

Reclocking still seems to work only partially (lost  display  and  another 
kind  of  hang  after  just  few seconds of glxgears  on highest perf level,
lost  display after I switch clocks back to lower frequencies), but this is 
another  issue

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