Subject: Re: [PATCH, RFC] Remove fasync() BKL usage, take 3325
From: Matt Mackall <mpm@selenic.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: Jonathan Corbet <corbet@lwn.net>, Oleg Nesterov <oleg@redhat.com>,
       Andrew Morton <akpm@linux-foundation.org>,
       Andi Kleen <andi@firstfloor.org>, linux-kernel@vger.kernel.org,
       viro@ZenIV.linux.org.uk, linux-api@vger.kernel.org,
       alan@lxorguk.ukuu.org.uk
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Date: Wed, 28 Jan 2009 12:13:47 -0600
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On Wed, 2009-01-28 at 12:55 -0500, Christoph Hellwig wrote:
> On Wed, Jan 28, 2009 at 10:44:14AM -0700, Jonathan Corbet wrote:
> > If others disagree, and using bitops is not an idea which will fly, I'd
> > sure like to know sooner rather than later.
> 
> There are more than enough use cases that have large numbers of open
> files (e.g. various high-end network servers).  While it might not be
> as sewer as for inodes I think it's really bad idea to do it for no
> reason. 

Maybe we can just demote f_ep_lock to f_lock and share it? 

Or extend flags and have two independent bitlocks in it. This actually
shrinks struct_file for most users.

-- 
http://selenic.com : development and support for Mercurial and Linux


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