[Bug 105873] [i915]Failed to release pages: bind_count=1, pages_pin_count=1, pin_display=0 on kernel 4.14.20

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105873

--- Comment #18 from Owen Zhang <owen.zhang at intel.com> ---
(In reply to Joonas Lahtinen from comment #17)
> Right, so this is not a regression, but trying to find which patches fix the
> issue in new kernels. So tagging this as enhancement, which it is.
> 
> The referred patch here itself has a Fixes: tag, so it should be applied
> only on top of the previously applied patch. That means if picking only this
> patch helps, then it is through incredible luck only. And if the pointed
> patch was in LTS, the Fixes: tag should have made it get picked up
> automatically.
> 
> Also, from the bisect log, we got:
> 
> "first bad commit: [010e3e68cd9cb65ea50c0af605e966cda333cb2a] drm/i915:
> Remove vma from object on destroy, not close"
> 
> That would mean that introducing this patch actually breaks the usecase, so
> I'm having trouble following why it is suggested as the fix? Please provide
> a proper bisect log where you actually build each suggested commit and run
> your testcase for each step, tagging it as good or bad depending on if your
> testcase passes or fails (if the testcase can't be reproduce the issue 100%
> of the time, then do enough runs on EACH step to make sure you have good
> confidence).

hi,
I had commented the reason why I marked the "bad".
""good" means can reproduce this issue.
"bad" means can't reproduce this issue. it means fixed this issue."

since "git bisect" must mark "bad" before "good". this cmd used to test the
regression. so the first "bad" patch is fixed patch in this situation. thanks.

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