linux-kernel - Re: [PATCH 0/7] breaking the global file_list

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Date:	Sun, 28 Jan 2007 14:43:25 +0000
From:	Christoph Hellwig <hch@...radead.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH 0/7] breaking the global file_list_lock

On Sun, Jan 28, 2007 at 12:51:18PM +0100, Peter Zijlstra wrote:
> This patch-set breaks up the global file_list_lock which was found to be a
> severe contention point under basically any filesystem intensive workload.

Benchmarks, please.  Where exactly do you see contention for this?

filesystem intensive workload apparently means namespace operation heavy
workload, right?  The biggest bottleneck I've seen with those is dcache lock.

Even if this is becoming a real problem there must be simpler ways to fix
this than introducing various new locking primitives and all kinds of
complexity.

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