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Re: Q. drm/i915 shrinker, synchronize_rcu_expedited() from handlers

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  Re: Q. drm/i915 shrinker, synchronize_rcu_expedited() from handlers "J. R. Okajima" <hooanon05g@gmail.com> - 2017-05-20 04:00 +0200
    Re: Q. drm/i915 shrinker, synchronize_rcu_expedited() from handlers Joonas Lahtinen <joonas.lahtinen@linux.intel.com> - 2017-05-22 08:10 +0200

#1646042 — Re: Q. drm/i915 shrinker, synchronize_rcu_expedited() from handlers

"J. R. Okajima":
> I don't know whether the fix is good to me or not yet. I will test your
> fix, but I am busy now and my test will be a few weeks later. Other
> people may want the fix soon. So I'd suggest you to reproduce the
> problem on your side. I guess "mem=1G" or "mem=512M" will make it easier
> to reproduce the problem.
> Of course, if you are sure the fix is correct, then you don't have to
> wait for my test. Release it soon for other people.

Now I am going to able to run my local test.
But V3 patch failed to apply onto v4.11.0.

Would you provide us two versions of the patch, one for v4.11 series and
the other of v4.12-rcN?


J. R. Okajima

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#1646534

On la, 2017-05-20 at 10:56 +0900, J. R. Okajima wrote:
> "J. R. Okajima":
> > 
> > I don't know whether the fix is good to me or not yet. I will test your
> > fix, but I am busy now and my test will be a few weeks later. Other
> > people may want the fix soon. So I'd suggest you to reproduce the
> > problem on your side. I guess "mem=1G" or "mem=512M" will make it easier
> > to reproduce the problem.
> > Of course, if you are sure the fix is correct, then you don't have to
> > wait for my test. Release it soon for other people.
> 
> Now I am going to able to run my local test.
> But V3 patch failed to apply onto v4.11.0.
> 
> Would you provide us two versions of the patch, one for v4.11 series and
> the other of v4.12-rcN?

For v4.12-rc2 the backport is here:

https://patchwork.freedesktop.org/patch/156990/

For quick testing on older kernels, just remove all lines with "_rcu"
in drivers/gpu/drm/i915/i915_gem_shrinker.c .

Regards, Joonas

PS: It'll help to subscribe to and track our mailing list at
intel-gfx@lists.freedesktop.org for future convenience.
-- 
Joonas Lahtinen
Open Source Technology Center
Intel Corporation

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