linux-kernel - Re: [RFC][PATCH 0/9] File descriptor hot-unplug support

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Message-ID: <20090411165651.GW26366@ZenIV.linux.org.uk>
Date:	Sat, 11 Apr 2009 17:56:51 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
	Hugh Dickins <hugh@...itas.com>, Tejun Heo <tj@...nel.org>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: Re: [RFC][PATCH 0/9] File descriptor hot-unplug support

On Sat, Apr 11, 2009 at 09:49:36AM -0700, Eric W. Biederman wrote:

> The fact that in the common case only one task ever accesses a struct
> file leaves a lot of room for optimization.

I'm not at all sure that it's a good assumption; even leaving aside e.g.
several tasks sharing stdout/stderr, a bunch of datagrams coming out of
several threads over the same socket is quite possible.
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