linux-kernel - Re: [PATCH 0/6] fs: Scalability of sockets/pipes allocation/deallocation on SMP

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Message-ID: <4930F82B.7030906@cosmosbay.com>
Date:	Sat, 29 Nov 2008 09:07:07 +0100
From:	Eric Dumazet <dada1@...mosbay.com>
To:	Christoph Hellwig <hch@...radead.org>
CC:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>,
	David Miller <davem@...emloft.net>,
	"Rafael J. Wysocki" <rjw@...k.pl>, linux-kernel@...r.kernel.org,
	kernel-testers@...r.kernel.org, Mike Galbraith <efault@....de>,
	Linux Netdev List <netdev@...r.kernel.org>,
	Christoph Lameter <cl@...ux-foundation.org>
Subject: Re: [PATCH 0/6] fs: Scalability of sockets/pipes	allocation/deallocation
 on SMP

Christoph Hellwig a écrit :
> On Fri, Nov 28, 2008 at 07:47:56PM +0100, Peter Zijlstra wrote:
>>> Wow, that's incredibly impressive! :-)
>> Yeah, we got a similar speedup on -rt by pushing those super-block files
>> list into per-cpu lists and doing crazy locking on them.
>>
>> Of course avoiding them all together, like done here is a nicer option
>> but is sadly not a possibility for regular files (until hch gets around
>> to removing the need for the list).
> 
> We should have finished this long ago, thanks for the reminder.
> 
> 

inode_in_use could be percpu, at least.

Or just zap it, since we never have to scan it.

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