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Message-ID: <20081127094849.GD13860@infradead.org>
Date:	Thu, 27 Nov 2008 04:48:49 -0500
From:	Christoph Hellwig <hch@...radead.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Eric Dumazet <dada1@...mosbay.com>, 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>,
	Christoph Hellwig <hch@...radead.org>, travis <travis@....com>
Subject: Re: [PATCH 4/6] fs: Introduce a per_cpu nr_inodes

On Thu, Nov 27, 2008 at 10:39:31AM +0100, Peter Zijlstra wrote:
> With it being called from writeback that might not be true for all
> workloads. One thing you can do about it is use the regular per-cpu
> counter stuff, which allows you to do an approximation of the global
> number (it also does all the hotplug stuff for you already).

The way it's used in writeback is utterly stupid and should be fixed :)

But otherwise agreed.

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