linux-kernel - Re: [PATCH 2/7] revoke: add f

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Message-ID: <84144f020703090358o76d1d82bk9479792173445fe3@mail.gmail.com>
Date:	Fri, 9 Mar 2007 13:58:04 +0200
From:	"Pekka Enberg" <penberg@...helsinki.fi>
To:	"Eric Dumazet" <dada1@...mosbay.com>
Cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	hch@...radead.org, alan@...rguk.ukuu.org.uk, serue@...ibm.com
Subject: Re: [PATCH 2/7] revoke: add f_light flag for struct file

On 3/9/07, Eric Dumazet <dada1@...mosbay.com> wrote:
> > Then just drop the fget_light() 'optimisation' and always take a reference
> > (atomic on f_count) regardless of single-thread or not. Instead of dirtying
> > f_light, just do the straightforward thing and be with it.

On 3/9/07, Pekka Enberg <penberg@...helsinki.fi> wrote:
> That's what I did first but akpm thought it was "unfortunate." Hmm.. ;-)

Btw, what we can do is delay closing the actual revoked file until the
task terminates. This has the unfortunate side-effect that a task has
no way of freeing the resources now. But, I am beginning to think it's
not a big problem because the inode mapping will be zapped immediately
upon revoke anyway...
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