From: Peter Zijlstra <peterz@infradead.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Steven Rostedt <rostedt@goodmis.org>,
linux-kernel@vger.kernel.org, rusty@rustcorp.com.au,
npiggin@suse.de, torvalds@linux-foundation.org,
tglx@linutronix.de, arjan@infradead.org
Subject: Re: [PATCH] use per cpu data for single cpu ipi calls
Date: Thu, 29 Jan 2009 12:41:56 +0100 [thread overview]
Message-ID: <1233229316.4495.39.camel@laptop> (raw)
In-Reply-To: <20090129111330.GB30738@elte.hu>
On Thu, 2009-01-29 at 12:13 +0100, Ingo Molnar wrote:
> * Peter Zijlstra <peterz@infradead.org> wrote:
>
> > > Can generic_smp_call_function_single_interrupt() ever see
> > > CSD_FLAG_ALLOC set now? If not, that kfree can go away.
> >
> > Like said above, removing that kmalloc will hurt people.
>
> the whole promise of generic-IPI seems to dwindle and we'll get back to
> roughly where we started out from.
I'd not go that far, the per-cpu csd is a nice fallback, but removing
that kmalloc is just silly.
And I see no reason why arch specific could do any better (aside from
sparc which has fancy ipis).
next prev parent reply other threads:[~2009-01-29 11:42 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-28 16:38 Buggy IPI and MTRR code on low memory Steven Rostedt
2009-01-28 16:41 ` Steven Rostedt
2009-01-28 16:46 ` Peter Zijlstra
2009-01-28 16:56 ` Steven Rostedt
2009-01-28 17:00 ` Peter Zijlstra
2009-01-28 17:24 ` Steven Rostedt
2009-01-28 18:20 ` Peter Zijlstra
2009-01-28 18:52 ` Steven Rostedt
2009-01-28 18:22 ` Arjan van de Ven
2009-01-28 18:34 ` Steven Rostedt
2009-01-28 21:12 ` Andrew Morton
2009-01-28 21:13 ` Andrew Morton
2009-01-28 21:23 ` Steven Rostedt
2009-01-28 22:07 ` Andrew Morton
2009-01-28 22:47 ` Steven Rostedt
2009-01-28 23:20 ` Andrew Morton
2009-01-28 23:50 ` Steven Rostedt
2009-01-28 23:25 ` Rusty Russell
2009-01-28 23:41 ` Steven Rostedt
2009-01-29 0:52 ` [PATCH] use per cpu data for single cpu ipi calls Steven Rostedt
2009-01-29 1:30 ` Andrew Morton
2009-01-29 1:56 ` Steven Rostedt
2009-01-29 8:49 ` Peter Zijlstra
2009-01-29 11:13 ` Ingo Molnar
2009-01-29 11:41 ` Peter Zijlstra [this message]
2009-01-29 13:42 ` Ingo Molnar
2009-01-29 14:07 ` Steven Rostedt
2009-01-29 15:08 ` [PATCH -v2] " Steven Rostedt
2009-01-29 15:33 ` Peter Zijlstra
2009-01-29 16:17 ` Ingo Molnar
2009-01-29 17:21 ` Linus Torvalds
2009-01-29 17:44 ` Steven Rostedt
2009-01-29 17:50 ` Steven Rostedt
2009-01-29 18:08 ` Linus Torvalds
2009-01-29 18:11 ` Steven Rostedt
2009-01-29 18:23 ` Peter Zijlstra
2009-01-29 18:31 ` Steven Rostedt
2009-01-29 18:39 ` Linus Torvalds
2009-01-29 18:44 ` Peter Zijlstra
2009-01-30 11:23 ` Jens Axboe
2009-01-30 12:32 ` [PATCH -v3] " Peter Zijlstra
2009-01-30 12:38 ` Jens Axboe
2009-01-30 12:48 ` Peter Zijlstra
2009-01-30 12:55 ` Jens Axboe
2009-01-30 12:56 ` Jens Axboe
2009-01-30 13:00 ` Peter Zijlstra
2009-01-30 13:02 ` [PATCH -v4] " Peter Zijlstra
2009-01-30 14:51 ` Ingo Molnar
2009-01-30 16:04 ` [PATCH -v3] " Linus Torvalds
2009-01-30 16:16 ` Peter Zijlstra
2009-01-31 8:44 ` Jens Axboe
2009-01-29 18:49 ` [PATCH -v2] " Ingo Molnar
2009-01-30 1:55 ` Rusty Russell
2009-01-29 17:47 ` Peter Zijlstra
2009-01-29 17:55 ` Peter Zijlstra
2009-01-29 18:08 ` Steven Rostedt
2009-01-30 1:11 ` Rusty Russell
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