From: William Lee Irwin III <wli@holomorphy.com>
To: Paul Mackerras <paulus@samba.org>
Cc: Anton Blanchard <anton@samba.org>,
Zwane Mwaikambo <zwane@linuxpower.ca>,
Linux Kernel <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>, Linus Torvalds <torvalds@osdl.org>,
Matt Mackall <mpm@selenic.com>,
"Nakajima, Jun" <jun.nakajima@intel.com>
Subject: Re: [PATCH][5/8] Arch agnostic completely out of line locks / ppc64
Date: Thu, 9 Sep 2004 17:09:03 -0700 [thread overview]
Message-ID: <20040910000903.GS3106@holomorphy.com> (raw)
In-Reply-To: <16704.59668.899674.868174@cargo.ozlabs.ibm.com>
William Lee Irwin III writes:
>> The semantics of profile_pc() have never included backtracing through
>> scheduling primitives, so I'd say just report __preempt_spin_lock().
On Fri, Sep 10, 2004 at 09:36:52AM +1000, Paul Mackerras wrote:
> I disagree that __preempt_spin_lock is a scheduling primitive, or at
> least I disagree that it is primarily a scheduling primitive. We
> don't spend vast amounts of time spinning in any of the other
> scheduling primitives; if we have to wait we call schedule().
Unfortunately the alternative appears to be stack unwinding in
profile_pc(), which was why I hoped we could punt. Any other ideas?
-- wli
next prev parent reply other threads:[~2004-09-10 0:17 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-03 0:02 [PATCH][5/8] Arch agnostic completely out of line locks / ppc64 Zwane Mwaikambo
2004-09-09 5:42 ` Paul Mackerras
2004-09-09 12:41 ` Zwane Mwaikambo
2004-09-09 14:54 ` Linus Torvalds
2004-09-09 14:55 ` Linus Torvalds
2004-09-09 15:32 ` Zwane Mwaikambo
2004-09-12 4:59 ` [PATCH] Yielding processor resources during lock contention Zwane Mwaikambo
2004-09-12 5:00 ` Andrew Morton
2004-09-12 5:10 ` Anton Blanchard
2004-09-12 5:13 ` Zwane Mwaikambo
2004-09-12 4:32 ` Nick Piggin
2004-09-12 5:33 ` Zwane Mwaikambo
2004-09-12 4:46 ` Nick Piggin
2004-09-12 5:51 ` Zwane Mwaikambo
2004-09-12 5:02 ` Nick Piggin
2004-09-12 6:09 ` Anton Blanchard
2004-09-12 6:58 ` William Lee Irwin III
2004-09-12 5:18 ` Andrew Morton
2004-09-12 5:10 ` Linus Torvalds
2004-09-12 5:27 ` Zwane Mwaikambo
2004-09-13 12:21 ` [PATCH] Yielding processor resources during lock contention #2 Zwane Mwaikambo
2004-09-12 7:49 ` [PATCH] Yielding processor resources during lock contention Ingo Molnar
2004-09-12 16:10 ` Zwane Mwaikambo
2004-09-12 19:34 ` Ingo Molnar
2004-09-12 10:10 ` Arnd Bergmann
2004-09-12 10:43 ` Anton Blanchard
2004-09-12 11:12 ` Arnd Bergmann
2004-09-09 15:43 ` [PATCH][5/8] Arch agnostic completely out of line locks / ppc64 Anton Blanchard
2004-09-09 17:19 ` William Lee Irwin III
2004-09-09 21:38 ` Paul Mackerras
2004-09-09 22:00 ` William Lee Irwin III
2004-09-09 23:36 ` Paul Mackerras
2004-09-10 0:09 ` William Lee Irwin III [this message]
2004-09-10 0:21 ` Linus Torvalds
2004-09-10 0:35 ` Anton Blanchard
2004-09-10 0:54 ` Linus Torvalds
2004-09-10 1:42 ` Anton Blanchard
2004-09-10 1:50 ` Anton Blanchard
2004-09-10 2:22 ` William Lee Irwin III
2004-09-10 2:32 ` William Lee Irwin III
2004-09-10 2:37 ` William Lee Irwin III
2004-09-10 3:24 ` Anton Blanchard
2004-09-10 7:40 ` Ingo Molnar
2004-09-10 12:16 ` William Lee Irwin III
2004-09-10 12:22 ` Ingo Molnar
2004-09-10 3:23 ` Anton Blanchard
2004-09-10 7:56 ` Anton Blanchard
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