From: Ingo Molnar <mingo@elte.hu>
To: Jens Axboe <jens.axboe@oracle.com>
Cc: linux-kernel@vger.kernel.org, npiggin@suse.de, paulus@samba.org,
tglx@linutronix.de, mingo@redhat.com, tony.luck@intel.com
Subject: Re: [PATCH 0/5] Generic smp_call_function(), improvements, and smp_call_function_single()
Date: Fri, 21 Mar 2008 10:53:43 +0100 [thread overview]
Message-ID: <20080321095343.GA21409@elte.hu> (raw)
In-Reply-To: <1205927772-31401-1-git-send-email-jens.axboe@oracle.com>
* Jens Axboe <jens.axboe@oracle.com> wrote:
> The patch series is also available in the 'generic-ipi' branch from
>
> git://git.kernel.dk/linux-2.6-block.git
>
> and the 'io-cpu-affinity' branch is directly based on this.
i'm still wondering about the following fundamental bit: why not use per
CPU kernel threads? That way you get a fast (lockless) IPI "for free" as
SMP wakeups already do this.
smp_call_function() is quirky and has deep limitations on atomicity,
etc., so we are moving away from it and should not base more
functionality on it.
Ingo
next prev parent reply other threads:[~2008-03-21 9:54 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-19 11:56 [PATCH 0/5] Generic smp_call_function(), improvements, and smp_call_function_single() Jens Axboe
2008-03-19 11:56 ` [PATCH 1/5] Add generic helpers for arch IPI function calls Jens Axboe
2008-03-19 11:56 ` [PATCH 2/5] x86: convert to generic helpers for " Jens Axboe
2008-03-19 11:56 ` [PATCH 3/5] x86-64: " Jens Axboe
2008-03-19 11:56 ` [PATCH 4/5] powerpc: " Jens Axboe
2008-03-19 11:56 ` [PATCH 5/5] ia64: " Jens Axboe
2008-03-21 9:53 ` Ingo Molnar [this message]
2008-03-21 13:15 ` [PATCH 0/5] Generic smp_call_function(), improvements, and smp_call_function_single() Jens Axboe
2008-03-25 8:00 ` Nick Piggin
2008-03-27 10:08 ` Ingo Molnar
2008-03-27 10:37 ` Jens Axboe
2008-03-27 10:43 ` Ingo Molnar
2008-03-27 12:02 ` Jens Axboe
2008-03-27 12:32 ` Ingo Molnar
2008-03-27 12:35 ` Jens Axboe
2008-03-21 18:22 ` Luck, Tony
2008-03-21 18:31 ` Jens Axboe
2008-03-21 18:56 ` Luck, Tony
2008-03-22 12:29 ` Jens Axboe
2008-03-24 16:45 ` Luck, Tony
2008-03-24 20:28 ` Luck, Tony
2008-03-25 8:12 ` Jens Axboe
2008-03-25 16:48 ` Luck, Tony
2008-03-25 18:00 ` Jens Axboe
2008-03-21 20:04 ` Luck, Tony
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