linux-kernel - Re: [PATCH 2/4] Convert epoll to a bitlock

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Date:	Wed, 4 Feb 2009 18:20:18 +1100
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Christoph Hellwig <hch@....de>
Cc:	Jonathan Corbet <corbet@....net>,
	Andrew Morton <akpm@...ux-foundation.org>, mpm@...enic.com,
	dada1@...mosbay.com, linux-kernel@...r.kernel.org,
	andi@...stfloor.org, oleg@...hat.com, viro@...iv.linux.org.uk,
	davidel@...ilserver.org, davem@...emloft.net,
	linux-api@...r.kernel.org, alan@...rguk.ukuu.org.uk
Subject: Re: [PATCH 2/4] Convert epoll to a bitlock

On Wednesday 04 February 2009 18:13:20 Christoph Hellwig wrote:
> On Tue, Feb 03, 2009 at 04:19:31PM -0700, Jonathan Corbet wrote:
> >  1) Use i_lock to protect accesses to f_flags.  This would enable some
> >     BKL usage to be removed, but would not fix fasync.
>
> What about just turning f_ep_lock into f_lock and using it?

Ah, yes I was going to say that too, but I confused i_lock with i_mutex
because it sounded like Jon needed a sleeping lock here?

Agree f_lock would be good. It might come in handy for other things too.

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