Re: [PATCH] x86: enable preemption in delay

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To: Steven Rostedt <rostedt@...>

Cc: LKML <linux-kernel@...>, linux-rt-users <linux-rt-users@...>, <akpm@...>, Ingo Molnar <mingo@...>, Thomas Gleixner <tglx@...>, Clark Williams <clark.williams@...>, Peter Zijlstra <peterz@...>, Luis Claudio R. Goncalves <lclaudio@...>, Gregory Haskins <ghaskins@...>, Andi Kleen <ak@...>, Linus Torvalds <torvalds@...>

Subject: Re: [PATCH] x86: enable preemption in delay

Date: Sunday, May 25, 2008 - 2:53 pm

On Sat, 24 May 2008 23:11:20 -0400 (EDT)
Steven Rostedt <rostedt@goodmis.org> wrote:
quoted text> 
> 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?
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Messages in current thread:

[PATCH] x86: enable preemption in delay, Steven Rostedt, (Sat May 24, 11:11 pm)

Re: [PATCH] x86: enable preemption in delay, Arjan van de Ven, (Sun May 25, 2:53 pm)

Re: [PATCH] x86: enable preemption in delay, Steven Rostedt, (Sun May 25, 3:32 pm)

Re: [PATCH] x86: enable preemption in delay, Thomas Gleixner, (Sun May 25, 3:01 pm)

Re: [PATCH] x86: enable preemption in delay, Arjan van de Ven, (Sun May 25, 3:28 pm)

Re: [PATCH] x86: enable preemption in delay, Thomas Gleixner, (Sun May 25, 8:44 am)

Re: [PATCH] x86: enable preemption in delay, Pavel Machek, (Sun May 25, 2:01 pm)

Re: [PATCH] x86: enable preemption in delay, Steven Rostedt, (Wed May 28, 9:01 am)

Re: [PATCH] x86: enable preemption in delay, Pavel Machek, (Sat May 31, 3:18 am)

[PATCH -v2] x86: enable preemption in delay, Steven Rostedt, (Sun May 25, 9:35 am)

Re: [PATCH -v2] x86: enable preemption in delay, Steven Rostedt, (Sun May 25, 9:44 am)

[PATCH -v3] x86: enable preemption in delay, Steven Rostedt, (Sun May 25, 9:51 am)

[PATCH -v4] x86: enable preemption in delay, Steven Rostedt, (Sun May 25, 11:13 am)

Re: [PATCH -v3] x86: enable preemption in delay, Steven Rostedt, (Sun May 25, 11:04 am)

Re: [PATCH] x86: enable preemption in delay, Steven Rostedt, (Sun May 25, 9:17 am)

Re: [PATCH] x86: enable preemption in delay, Thomas Gleixner, (Sun May 25, 4:21 pm)

Re: [PATCH] x86: enable preemption in delay, Alan Cox, (Sun May 25, 9:19 am)

Re: [PATCH] x86: enable preemption in delay, Steven Rostedt, (Sun May 25, 9:40 am)

Re: [PATCH] x86: enable preemption in delay, Steven Rostedt, (Sun May 25, 9:07 am)


linux-kernel:
Greg Kroah-Hartman	[PATCH 008/196] Chinese: add translation of volatile-considered-harmful.txt
Tarkan Erimer	Re: Dual-Licensing Linux Kernel with GPL V2 and GPL V3
Greg KH	Re: [Patch v2] Make PCI extended config space (MMCONFIG) a driver opt-in
Andrew Morton	-mm merge plans for 2.6.23
git:

linux-netdev:
Gerrit Renker	[PATCH 27/37] dccp: Integration of dynamic feature activation - part 2 (server side)
Herbert Xu	Re: [PATCH] pkt_sched: Destroy gen estimators under rtnl_lock().
David Miller	[GIT]: Networking
Rémi Denis-Courmont	[PATCH 01/14] Phonet global definitions
openbsd-misc:

Re: [PATCH] x86: enable preemption in delay

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