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Re: [PATCH 1/2] scalable rw_mutex

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From: Andrew Morton
Subject: Re: [PATCH 1/2] scalable rw_mutex
Date: Friday, May 11, 2007 - 11:05 am

On Fri, 11 May 2007 10:07:17 -0700 (PDT)
Christoph Lameter <clameter@sgi.com> wrote:


Well.  That would be a millisecond per cpu which sounds improbable.  And
we'd need to be calling it under local_irq_save() which we presently don't.
And nobody has reported any problems against the existing callsites.

But it's no speed demon, that's for sure.
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Messages in current thread:
[PATCH 1/2] scalable rw_mutex, Peter Zijlstra, (Fri May 11, 6:15 am)
Re: [PATCH 1/2] scalable rw_mutex, Christoph Hellwig, (Fri May 11, 7:03 am)
Re: [PATCH 1/2] scalable rw_mutex, Andrew Morton, (Fri May 11, 9:31 am)
Re: [PATCH 1/2] scalable rw_mutex, Christoph Lameter, (Fri May 11, 10:07 am)
Re: [PATCH 1/2] scalable rw_mutex, Peter Zijlstra, (Fri May 11, 10:57 am)
Re: [PATCH 1/2] scalable rw_mutex, Andrew Morton, (Fri May 11, 11:05 am)
Re: [PATCH 1/2] scalable rw_mutex, Oleg Nesterov, (Fri May 11, 4:00 pm)
Re: [PATCH 1/2] scalable rw_mutex, Peter Zijlstra, (Sat May 12, 12:39 am)
Re: [PATCH 1/2] scalable rw_mutex, Peter Zijlstra, (Sat May 12, 6:41 am)
Re: [PATCH 1/2] scalable rw_mutex, Oleg Nesterov, (Sat May 12, 9:04 am)
Re: [PATCH 1/2] scalable rw_mutex, Peter Zijlstra, (Sat May 12, 9:57 am)
Re: [PATCH 1/2] scalable rw_mutex, Oleg Nesterov, (Sat May 12, 11:03 am)
Re: [PATCH 1/2] scalable rw_mutex, Andrew Morton, (Sat May 12, 11:06 am)
Re: [PATCH 1/2] scalable rw_mutex, Andrew Morton, (Sat May 12, 11:11 am)
Re: [PATCH 1/2] scalable rw_mutex, Oleg Nesterov, (Sat May 12, 11:12 am)
Re: [PATCH 1/2] scalable rw_mutex, Andi Kleen, (Sat May 12, 11:55 am)
Re: [PATCH 1/2] scalable rw_mutex, Andi Kleen, (Sat May 12, 12:21 pm)
Re: [PATCH 1/2] scalable rw_mutex, Oleg Nesterov, (Sat May 12, 2:42 pm)
Re: [PATCH 1/2] scalable rw_mutex, Peter Zijlstra, (Mon May 14, 3:59 am)
Re: [PATCH 1/2] scalable rw_mutex, Nick Piggin, (Mon May 14, 4:36 am)
Re: [PATCH 1/2] scalable rw_mutex, Paul E. McKenney, (Mon May 14, 5:36 pm)
Re: [PATCH 1/2] scalable rw_mutex, Peter Zijlstra, (Tue May 15, 12:43 am)
Re: [PATCH 1/2] scalable rw_mutex, Paul E. McKenney, (Tue May 15, 8:29 am)
Re: [PATCH 1/2] scalable rw_mutex, Peter Zijlstra, (Tue May 15, 9:17 am)
Re: [PATCH 1/2] scalable rw_mutex, Paul E. McKenney, (Tue May 15, 11:52 am)
Re: [PATCH 1/2] scalable rw_mutex, Andrew Morton, (Wed May 16, 4:28 pm)
Re: [PATCH 1/2] scalable rw_mutex, Christoph Lameter, (Wed May 16, 4:40 pm)
Re: [PATCH 1/2] scalable rw_mutex, Andrew Morton, (Wed May 16, 5:24 pm)