From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Mathieu Desnoyers <compudj@krystal.dyndns.org>
Cc: Martin Bligh <mbligh@google.com>,
"Frank Ch. Eigler" <fche@redhat.com>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
prasanna@in.ibm.com, Andrew Morton <akpm@osdl.org>,
Ingo Molnar <mingo@elte.hu>, Paul Mundt <lethal@linux-sh.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Jes Sorensen <jes@sgi.com>, Tom Zanussi <zanussi@us.ibm.com>,
Richard J Moore <richardj_moore@uk.ibm.com>,
Michel Dagenais <michel.dagenais@polymtl.ca>,
Christoph Hellwig <hch@infradead.org>,
Greg Kroah-Hartman <gregkh@suse.de>,
Thomas Gleixner <tglx@linutronix.de>,
William Cohen <wcohen@redhat.com>,
ltt-dev@shafik.org, systemtap@sources.redhat.com,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Karim Yaghmour <karim@opersys.com>, Pavel Machek <pavel@suse.cz>,
Joe Perches <joe@perches.com>,
"Randy.Dunlap" <rdunlap@xenotime.net>,
"Jose R. Santos" <jrs@us.ibm.com>
Subject: Re: [PATCH] Linux Kernel Markers 0.11 for 2.6.17
Date: Mon, 25 Sep 2006 14:22:13 -0700 [thread overview]
Message-ID: <45184885.8020807@goop.org> (raw)
In-Reply-To: <20060925204701.GB3770@Krystal>
Mathieu Desnoyers wrote:
> Better idea : we could put a read/write dependency on a memory location.
>
Yes, that works well. And it needn't even exist:
extern int __marker_sequencer; /* doesn't exist, never referenced */
asm volatile("first asm" : "+m" (__marker_sequencer));
asm volatile("second asm" : "+m" (__marker_sequencer));
This keeps the asms ordered with respect to each other (and prevents to
independent markers from being intermingled), but it doesn't prevent
them from being re-ordered with respect to other code.
J
next prev parent reply other threads:[~2006-09-25 21:22 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-25 15:10 [PATCH] Linux Kernel Markers 0.11 for 2.6.17 Mathieu Desnoyers
2006-09-25 16:01 ` Frank Ch. Eigler
2006-09-25 23:28 ` Mathieu Desnoyers
2006-09-26 16:39 ` Frank Ch. Eigler
2006-09-27 1:30 ` Mathieu Desnoyers
2006-09-27 16:12 ` Frank Ch. Eigler
2006-09-25 18:16 ` Jeremy Fitzhardinge
2006-09-25 20:10 ` Mathieu Desnoyers
2006-09-25 20:25 ` Jeremy Fitzhardinge
2006-09-25 20:35 ` Mathieu Desnoyers
2006-09-25 20:47 ` Mathieu Desnoyers
2006-09-25 21:22 ` Jeremy Fitzhardinge [this message]
2006-09-25 21:32 ` Mathieu Desnoyers
2006-09-25 21:35 ` Jeremy Fitzhardinge
2006-09-25 23:13 ` Mathieu Desnoyers
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