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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: Peter Zijlstra <peterz@...>, 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: Monday, August 25, 2008 - 11:44 am

Paul E. McKenney wrote:


I think there was an AIM9 regression in the close/open tests when the struct
file was switched to RCU. That test could be run with various intervals to
figure out if a shorter RCU period is beneficial and how short an RCU period
is needed to avoid the regression.


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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)