From: Gregory Haskins <ghaskins@novell.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Gregory Haskins <gregory.haskins@gmail.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 12:29:42 -0400 [thread overview]
Message-ID: <48B823F6.1010509@novell.com> (raw)
In-Reply-To: <20080829162216.GW26610@one.firstfloor.org>
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Andi Kleen wrote:
>> 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.
>
Thinking about this some more, perhaps the issue is I am not hitting the
contended path in vsyscall?
-Greg
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next prev parent reply other threads:[~2008-08-29 16:32 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-29 15:44 [PATCH] seqlock: serialize against writers Gregory Haskins
2008-08-29 16:09 ` Andi Kleen
2008-08-29 16:10 ` Gregory Haskins
2008-08-29 16:22 ` Andi Kleen
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 [this message]
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 18:03 ` 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
2008-09-02 13:29 ` Gregory Haskins
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