From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
To: "J. R. Okajima" <hooanon05g@gmail.com>,
Andrea Arcangeli <aarcange@redhat.com>
Cc: chris@chris-wilson.co.uk, daniel.vetter@ffwll.ch,
jani.nikula@intel.com, linux-kernel@vger.kernel.org
Subject: Re: Q. drm/i915 shrinker, synchronize_rcu_expedited() from handlers
Date: Fri, 05 May 2017 12:39:40 +0300 [thread overview]
Message-ID: <1493977180.3551.24.camel@linux.intel.com> (raw)
In-Reply-To: <16988.1493604328@jrobl>
On ma, 2017-05-01 at 11:05 +0900, J. R. Okajima wrote:
> Thanx for the reply.
>
> Andrea Arcangeli:
> >
> > Yes I already reported this, my original fix was way more efficient
> > (and also safer considering the above) than what landed upstream. My
> > feedback was ignored though.
> >
> > https://lists.freedesktop.org/archives/intel-gfx/2017-April/125414.html
>
> I see.
> Actually on my test system for v4.11-rc8, kthreadd, kworker, kswapd and
> others all stopped working due to the synchronize_rcu_expedited call
> from i915_gem_shrinker_count. It is definitly a show stopper for me as
> an i915 user.
Filing a bug in freedesktop.org with all the details is the fastest way
of getting help. Without the bug (and with such little information as
the previous e-mail) it's hard to estimate the extent and nature of the
bug.
I've anyway gone and prepared a patch to drop the RCU sync completely
from shrinker phase, as discussed originally with Chris.
Regards, Joonas
--
Joonas Lahtinen
Open Source Technology Center
Intel Corporation
next prev parent reply other threads:[~2017-05-05 9:39 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-30 6:07 Q. drm/i915 shrinker, synchronize_rcu_expedited() from handlers J. R. Okajima
2017-04-30 9:43 ` Andrea Arcangeli
2017-05-01 2:05 ` J. R. Okajima
2017-05-05 9:39 ` Joonas Lahtinen [this message]
2017-05-05 21:57 ` Hugh Dickins
2017-05-08 8:04 ` Joonas Lahtinen
2017-05-10 3:04 ` Hugh Dickins
2017-05-10 9:54 ` Joonas Lahtinen
2017-05-10 10:43 ` Andrea Arcangeli
2017-05-10 11:01 ` Joonas Lahtinen
2017-05-05 23:28 ` J. R. Okajima
2017-05-20 1:56 ` J. R. Okajima
2017-05-22 6:02 ` Joonas Lahtinen
2017-05-30 20:00 ` Hugh Dickins
2017-05-31 7:10 ` Jani Nikula
2017-05-31 7:27 ` Joonas Lahtinen
2017-06-14 23:05 ` J. R. Okajima
2017-06-15 7:07 ` Jani Nikula
2017-06-26 23:15 ` J. R. Okajima
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