From: Arjan van de Ven <arjan@infradead.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
linux-rt-users <linux-rt-users@vger.kernel.org>,
akpm@osdl.org, Ingo Molnar <mingo@elte.hu>,
Thomas Gleixner <tglx@linutronix.de>,
Clark Williams <clark.williams@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
"Luis Claudio R. Goncalves" <lclaudio@uudg.org>,
Gregory Haskins <ghaskins@novell.com>, Andi Kleen <ak@suse.de>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH] x86: enable preemption in delay
Date: Sun, 25 May 2008 11:53:05 -0700 [thread overview]
Message-ID: <20080525115305.79c12c8c@infradead.org> (raw)
In-Reply-To: <Pine.LNX.4.58.0805242306280.3977@gandalf.stny.rr.com>
On Sat, 24 May 2008 23:11:20 -0400 (EDT)
Steven Rostedt <rostedt@goodmis.org> wrote:
>
> In git commit 35d5d08a085c56f153458c3f5d8ce24123617faf, Andrew Morton
> placed preempt_disable around the entire delay due to TSC's not
> working nicely on SMP. Unfortunately for those that care about
> latencies this is devastating! Especially when we have callers to
> mdelay(8).
we used to have a WARN_ON if mdelay was called while preemptable..
maybe we should put that back in?
next prev parent reply other threads:[~2008-05-25 18:55 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-25 3:11 Steven Rostedt
2008-05-25 12:44 ` Thomas Gleixner
2008-05-25 13:07 ` Steven Rostedt
2008-05-25 13:17 ` Steven Rostedt
2008-05-25 13:19 ` Alan Cox
2008-05-25 13:40 ` Steven Rostedt
2008-05-25 20:21 ` Thomas Gleixner
2008-05-25 13:35 ` [PATCH -v2] " Steven Rostedt
2008-05-25 13:44 ` Steven Rostedt
2008-05-25 13:51 ` [PATCH -v3] " Steven Rostedt
2008-05-25 15:04 ` Steven Rostedt
2008-05-25 15:13 ` [PATCH -v4] " Steven Rostedt
2008-05-25 18:01 ` [PATCH] " Pavel Machek
2008-05-28 13:01 ` Steven Rostedt
2008-05-31 7:18 ` Pavel Machek
2008-05-25 18:53 ` Arjan van de Ven [this message]
2008-05-25 19:01 ` Thomas Gleixner
2008-05-25 19:28 ` Arjan van de Ven
2008-05-25 19:32 ` Steven Rostedt
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