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Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rather than rcu

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From: Christoph Lameter <cl@...>
To: <paulmck@...>
Cc: Pekka Enberg <penberg@...>, Ingo Molnar <mingo@...>, Jeremy Fitzhardinge <jeremy@...>, Nick Piggin <nickpiggin@...>, Andi Kleen <andi@...>, Pallipadi, Venkatesh <venkatesh.pallipadi@...>, Suresh Siddha <suresh.b.siddha@...>, Jens Axboe <jens.axboe@...>, Rusty Russell <rusty@...>, Linux Kernel Mailing List <linux-kernel@...>
Subject: Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rather than rcu
Date: Friday, August 22, 2008 - 4:03 pm

Paul E. McKenney wrote:


Isnt there some way to shorten the rcu periods significantly? Critical
sections do not take that long after all.

If the RCU periods are much shorter then the chance of cache hotness of the
objects is increased.

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Messages in current thread:
[PATCH 2/2] smp_call_function: use rwlocks on queues rather ..., Jeremy Fitzhardinge, (Thu Aug 21, 8:29 pm)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Ingo Molnar, (Fri Aug 22, 2:28 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Pekka Enberg, (Fri Aug 22, 3:06 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Christoph Lameter, (Fri Aug 22, 10:01 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Paul E. McKenney, (Fri Aug 22, 11:11 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Christoph Lameter, (Fri Aug 22, 1:14 pm)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Paul E. McKenney, (Fri Aug 22, 2:29 pm)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Christoph Lameter, (Fri Aug 22, 2:36 pm)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Paul E. McKenney, (Fri Aug 22, 3:52 pm)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Christoph Lameter, (Fri Aug 22, 4:03 pm)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Paul E. McKenney, (Fri Aug 22, 4:53 pm)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Peter Zijlstra, (Mon Aug 25, 6:31 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Paul E. McKenney, (Mon Aug 25, 11:12 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Christoph Lameter, (Mon Aug 25, 11:44 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Paul E. McKenney, (Mon Aug 25, 4:05 pm)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Peter Zijlstra, (Mon Aug 25, 11:22 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Christoph Lameter, (Mon Aug 25, 11:46 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues , Nick Piggin, (Tue Aug 26, 1:13 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Paul E. McKenney, (Tue Aug 26, 9:40 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Paul E. McKenney, (Mon Aug 25, 4:04 pm)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Peter Zijlstra, (Mon Aug 25, 11:51 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Paul E. McKenney, (Tue Aug 26, 9:43 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Peter Zijlstra, (Tue Aug 26, 10:07 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Paul E. McKenney, (Wed Aug 27, 11:16 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Andi Kleen, (Fri Aug 22, 2:33 pm)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Paul E. McKenney, (Fri Aug 22, 6:40 pm)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Jeremy Fitzhardinge, (Fri Aug 22, 2:35 pm)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Andi Kleen, (Sat Aug 23, 3:34 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Jeremy Fitzhardinge, (Sun Aug 24, 12:55 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Andi Kleen, (Sun Aug 24, 5:01 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Ingo Molnar, (Fri Aug 22, 3:12 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Nick Piggin, (Fri Aug 22, 5:12 am)
Re: [PATCH 2/2] smp_call_function: use rwlocks on queues rat..., Nick Piggin, (Thu Aug 21, 9:53 pm)