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To: Nick Piggin <npiggin@suse.de>
Cc: Christoph Hellwig <hch@infradead.org>, Al Viro <viro@ZenIV.linux.org.uk>,
       linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
       Frank Mayhar <fmayhar@google.com>, John Stultz <johnstul@us.ibm.com>,
       Andi Kleen <ak@linux.intel.com>, Alan Cox <alan@lxorguk.ukuu.org.uk>,
       "Eric W. Biederman" <ebiederm@xmission.com>,
       Greg Kroah-Hartman <gregkh@suse.de>
Subject: Re: [patch 1/4] fs: cleanup files_lock
From: Andi Kleen <andi@firstfloor.org>
References: <20100604064307.737085373@suse.de>
	<20100604072618.227745945@suse.de>
	<20100604083818.GA9987@infradead.org> <20100604142052.GD26335@laptop>
Date: Fri, 04 Jun 2010 16:39:20 +0200
In-Reply-To: <20100604142052.GD26335@laptop> (Nick Piggin's message of "Sat\, 5 Jun 2010 00\:20\:52 +1000")
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Nick Piggin <npiggin@suse.de> writes:
>
> Again, this would be nice, but I didn't see an easy way to do it.
> Even if refcounting obsoleted may_remount_ro, we still have
> mark_files_ro. It's no more complex to rip this all out after my
> patch. I don't see the problem in doing this patch. It has good
> numbers.

Yes agreed. The global lock is currently really painful on workloads
that do a lot of opens and anything to make this better would be good asap.

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only.