From: Peter Zijlstra <peterz@infradead.org>
To: "Arve Hjønnevåg" <arve@android.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
"devel@driverdev.osuosl.org" <devel@driverdev.osuosl.org>,
Riley Andrews <riandrews@android.com>,
LKML <linux-kernel@vger.kernel.org>,
Christoph Hellwig <hch@infradead.org>,
Todd Kjos <tkjos@google.com>
Subject: Re: [PATCH] android: binder: Disable preemption while holding the global binder lock
Date: Tue, 13 Sep 2016 09:32:59 +0200 [thread overview]
Message-ID: <20160913073259.GC5008@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <CAMP5XgfDybsfz-v2NTYqAX8K48xCJ_zkH65AHosAOmT7P=Gyxg@mail.gmail.com>
On Mon, Sep 12, 2016 at 08:44:09PM -0700, Arve Hjønnevåg wrote:
> A previous attempt to fix this problem, changed the lock to use
> rt_mutex instead of mutex, but this apparently did not work as well as
> this patch. I believe the added overhead was noticeable, and it did
> not work when the preempted thread was in a different cgroup (I don't
> know if this is still the case).
Do you actually have RR/FIFO/DL tasks? Currently PI isn't
defined/implemented for OTHER.
cgroups should be irrelevant, PI is unaware of them.
next prev parent reply other threads:[~2016-09-13 7:33 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-08 16:12 [PATCH] android: binder: Disable preemption while holding the global binder lock Todd Kjos
2016-09-08 16:15 ` Todd Kjos
2016-09-08 17:46 ` Greg Kroah-Hartman
2016-09-10 16:16 ` Christoph Hellwig
2016-09-10 16:22 ` Peter Zijlstra
2016-09-10 16:37 ` Thomas Gleixner
2016-09-10 17:28 ` Greg Kroah-Hartman
2016-09-12 15:49 ` Todd Kjos
2016-09-13 3:44 ` Arve Hjønnevåg
2016-09-13 6:42 ` Greg Kroah-Hartman
2016-09-13 19:52 ` Arve Hjønnevåg
2016-09-13 7:32 ` Peter Zijlstra [this message]
2016-09-13 19:53 ` Arve Hjønnevåg
2016-09-14 7:10 ` Peter Zijlstra
2016-09-14 7:41 ` Peter Zijlstra
2016-09-14 13:38 ` Peter Zijlstra
2016-09-14 16:11 ` Peter Zijlstra
2016-09-14 16:13 ` Peter Zijlstra
2016-09-14 16:55 ` Peter Zijlstra
2016-09-17 0:42 ` Todd Kjos
-- strict thread matches above, loose matches on Subject: below --
2016-09-09 15:17 Todd Kjos
2016-09-09 15:44 ` Greg KH
2016-09-09 17:39 ` Todd Kjos
2016-09-10 11:18 ` Greg KH
2016-09-10 11:25 ` Greg KH
2016-09-09 16:37 ` kbuild test robot
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