From: Andreas Gruenbacher <agruen@suse.de>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Marcelo Tosatti <marcelo@conectiva.com.br>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] 2.4: Restore current->files in flush_old_exec
Date: Sat, 9 Aug 2003 05:01:50 +0200 (CEST) [thread overview]
Message-ID: <Pine.LNX.4.53.0308090501090.18879@Chaos.suse.de> (raw)
In-Reply-To: <20030809025311.GB11777@gondor.apana.org.au>
On Sat, 9 Aug 2003, Herbert Xu wrote:
> On Sat, Aug 09, 2003 at 04:20:38AM +0200, Andreas Gruenbacher wrote:
> > On Sat, 9 Aug 2003, Herbert Xu wrote:
> >
> > > On Sat, Aug 09, 2003 at 11:11:16AM +1000, herbert wrote:
> > > >
> > > > At this point, I believe the unshare_files stuff should be fine from
> > > > a correctness point of view. However, there is still a performance
> > > > problem as every ELF exec call ends up dupliating the files structure
> > > > as well as walking through all file locks.
> > >
> > > Here is the patch that ensures files is only duplicated when necessary.
> >
> > This patch is correct but unnecessary: steal_locks already tests for this
> > condition.
>
> Yes but when you call unshare_files twice one of them will have to
> copy.
I see---that happens through flush_old_exec.
next prev parent reply other threads:[~2003-08-09 3:02 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-08 10:53 [PATCH] 2.4: Fix steal_locks race Herbert Xu
2003-08-09 1:07 ` Herbert Xu
2003-08-09 1:11 ` [PATCH] 2.4: Restore current->files in flush_old_exec Herbert Xu
2003-08-09 1:48 ` Andreas Gruenbacher
2003-08-09 1:48 ` Herbert Xu
2003-08-09 2:20 ` Andreas Gruenbacher
2003-08-09 2:53 ` Herbert Xu
2003-08-09 3:01 ` Andreas Gruenbacher [this message]
2003-08-09 3:19 ` Andreas Gruenbacher
[not found] ` <Pine.LNX.4.53.0308090554160.18879@Chaos.suse.de>
[not found] ` <20030809100518.GA14688@gondor.apana.org.au>
2003-08-09 10:41 ` Andreas Gruenbacher
2003-08-09 1:46 ` [PATCH] 2.4: Fix steal_locks race Andreas Gruenbacher
2003-08-09 2:04 ` Andreas Gruenbacher
2003-08-09 2:52 ` Herbert Xu
2003-08-09 3:13 ` Andreas Gruenbacher
2003-08-09 3:19 ` Herbert Xu
2003-08-09 3:30 ` Andreas Gruenbacher
2003-08-09 2:59 ` Andreas Gruenbacher
2003-08-09 3:04 ` Herbert Xu
2003-08-09 3:17 ` Andreas Gruenbacher
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