From: Nick Piggin <npiggin@suse.de>
To: Andi Kleen <andi@firstfloor.org>
Cc: Jens Axboe <jens.axboe@oracle.com>,
"Alan D. Brunelle" <Alan.Brunelle@hp.com>,
linux-kernel@vger.kernel.org, dgc@sgi.com, arjan@linux.intel.com
Subject: Re: IO queueing and complete affinity w/ threads: Some results
Date: Tue, 19 Feb 2008 02:49:12 +0100 [thread overview]
Message-ID: <20080219014911.GD21165@wotan.suse.de> (raw)
In-Reply-To: <p73ablyxuci.fsf@bingen.suse.de>
On Mon, Feb 18, 2008 at 02:33:17PM +0100, Andi Kleen wrote:
> Jens Axboe <jens.axboe@oracle.com> writes:
>
> > and that scrapping the remote
> > softirq trigger stuff is sanest.
>
> I actually liked Nick's queued smp_function_call_single() patch. So even
> if it was not used for block I would still like to see it being merged
> in some form to speed up all the other IPI users.
Yeah, that hasn't been forgotten (nor have your comments about folding
my special function into smp_call_function_single).
The call function path is terribly unscalable at the moment on a lot
of architectures, and also it isn't allowed to be used with interrupts
off due to deadlock (which the queued version can allow, provided
that wait=0).
I will get around to sending that upstream soon.
next prev parent reply other threads:[~2008-02-19 1:50 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-11 20:56 Alan D. Brunelle
2008-02-12 20:56 ` Alan D. Brunelle
2008-02-12 22:08 ` Alan D. Brunelle
2008-02-12 22:26 ` Alan D. Brunelle
2008-02-13 15:35 ` Alan D. Brunelle
2008-02-14 15:36 ` Alan D. Brunelle
2008-02-18 12:37 ` Jens Axboe
2008-02-18 13:33 ` Andi Kleen
2008-02-18 14:16 ` Jens Axboe
2008-02-19 1:49 ` Nick Piggin [this message]
2008-02-19 21:14 ` Paul Jackson
2008-02-19 21:31 ` Mike Travis
2008-02-20 8:08 ` Jens Axboe
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