From: Andi Kleen <andi@firstfloor.org>
To: Gregory Haskins <gregory.haskins@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>,
Gregory Haskins <ghaskins@novell.com>,
mingo@elte.hu, rostedt@goodmis.org, tglx@linutronix.de,
linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org
Subject: Re: [PATCH] seqlock: serialize against writers
Date: Fri, 29 Aug 2008 18:22:16 +0200 [thread overview]
Message-ID: <20080829162216.GW26610@one.firstfloor.org> (raw)
In-Reply-To: <48B81F60.3080409@gmail.com>
> Im running it on a x86_64 box as we speak. How can I tell if there is a
> certain mode that is permitting this?
If the boot up says you're running with PMtimer then it uses the fallback
(usually happens on pre Fam10h AMD boxes). A typical Intel box
would use the faster ring 3 only TSC path and then explode with your
change I bet.
Or step with gdb through gettimeofday() and see if it does a syscall.
-Andi
next prev parent reply other threads:[~2008-08-29 16:19 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-29 15:44 Gregory Haskins
2008-08-29 16:09 ` Andi Kleen
2008-08-29 16:10 ` Gregory Haskins
2008-08-29 16:22 ` Andi Kleen [this message]
2008-08-29 16:26 ` Gregory Haskins
2008-08-29 16:34 ` Steven Rostedt
2008-08-29 16:35 ` Gregory Haskins
2008-08-29 16:45 ` Andi Kleen
2008-08-29 16:53 ` Steven Rostedt
2008-08-29 17:00 ` Gregory Haskins
2008-08-29 17:00 ` Gregory Haskins
2008-08-29 16:58 ` Steven Rostedt
2008-08-29 16:29 ` Gregory Haskins
2008-08-29 16:37 ` Andi Kleen
2008-08-29 16:41 ` Gregory Haskins
2008-08-29 17:08 ` Andi Kleen
2008-08-29 16:57 ` Stephen Hemminger
2008-08-29 17:02 ` [ RT PATCH] " Steven Rostedt
2008-08-29 18:03 ` [RT PATCH v2] " Gregory Haskins
2008-08-29 18:12 ` Gregory Haskins
2008-08-30 11:17 ` Peter Zijlstra
2008-08-30 12:32 ` Gregory Haskins
2008-08-30 12:38 ` Peter Zijlstra
2008-08-30 13:05 ` Gregory Haskins
2008-08-30 11:08 ` [PATCH] " Peter Zijlstra
2008-09-02 12:45 ` [RT PATCH v3] " Gregory Haskins
2008-09-02 13:01 ` Gregory Haskins
2008-09-02 13:29 ` [RT PATCH v4] " Gregory Haskins
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