linux-kernel - Re: [patch 016/104] epoll: introduce resource usage limits

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Date:	Wed, 28 Jan 2009 08:56:29 -0800 (PST)
From:	Davide Libenzi <davidel@...ilserver.org>
To:	Bron Gondwana <brong@...tmail.fm>
cc:	Greg KH <gregkh@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	stable@...nel.org, Justin Forbes <jmforbes@...uxtx.org>,
	Zwane Mwaikambo <zwane@....linux.org.uk>,
	Theodore Ts'o <tytso@....edu>,
	Randy Dunlap <rdunlap@...otime.net>,
	Dave Jones <davej@...hat.com>,
	Chuck Wolber <chuckw@...ntumlinux.com>
Subject: Re: [patch 016/104] epoll: introduce resource usage limits

On Wed, 28 Jan 2009, Bron Gondwana wrote:

> > -       if (unlikely(atomic_read(&user->epoll_devs) >=
> > -                       max_user_instances))
> > +       if (atomic_read(&user->epoll_devs) >= max_user_instances)
> >  		goto free_uid;
> 
> Any reason this has become _less_ unlikely()?

GCC seems to make that choice anyway, according to quite a few tests I ran 
yesterday.


- Davide


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