From: Rusty Russell <rusty@rustcorp.com.au>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>,
mingo@elte.hu, jens.axboe@oracle.com, a.p.zijlstra@chello.nl,
cborntra@de.ibm.com, linux-kernel@vger.kernel.org,
arjan@infradead.org
Subject: Re: [PATCH RFC 1/3] Add a trigger API for efficient non-blocking waiting
Date: Mon, 25 Aug 2008 10:53:48 +1000 [thread overview]
Message-ID: <200808251053.49033.rusty@rustcorp.com.au> (raw)
In-Reply-To: <20080820122546.6022d91d.akpm@linux-foundation.org>
On Thursday 21 August 2008 05:25:46 Andrew Morton wrote:
> If stop_machine() is the _only_ problematic callsite and we reasonably
> expect that no new ones will pop up then sure, a
> stop_machine()-specific fix might be appropriate.
>
> Otherwise, sure, we'd need to loko at something more general.
The reason I'm interested is that we have 331 cpu_relax() calls outside the
arch trees. That seems like a lot, and I wonder if what they really want is
a spinpletion.
Cheers,
Rusty.
next prev parent reply other threads:[~2008-08-25 4:00 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-16 16:34 [PATCH RFC 1/3] Add a trigger API for efficient non-blocking waiting Jeremy Fitzhardinge
2008-08-16 17:47 ` Arjan van de Ven
2008-08-17 23:02 ` Randy Dunlap
2008-08-20 6:21 ` Andrew Morton
2008-08-20 18:42 ` Jeremy Fitzhardinge
2008-08-20 19:25 ` Andrew Morton
2008-08-20 20:14 ` Jeremy Fitzhardinge
2008-08-25 0:53 ` Rusty Russell [this message]
2008-08-28 12:27 ` Christian Borntraeger
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