From: Trond Myklebust <trond.myklebust@fys.uio.no>
To: "Stephen C. Tweedie" <sct@redhat.com>
Cc: Linus Torvalds <torvalds@transmeta.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>, Andi Kleen <ak@suse.de>,
Daniel Phillips <phillips@innominate.de>,
linux-kernel@vger.kernel.org
Subject: Re: Subtle MM bug
Date: Thu, 11 Jan 2001 14:12:05 +0100 (CET) [thread overview]
Message-ID: <14941.45349.131276.684932@charged.uio.no> (raw)
In-Reply-To: <20010111125604.A17177@redhat.com>
In-Reply-To: <E14GQyR-0000mh-00@the-village.bc.nu> <Pine.LNX.4.10.10101101210080.4572-100000@penguin.transmeta.com> <20010111125604.A17177@redhat.com>
>>>>> " " == Stephen C Tweedie <sct@redhat.com> writes:
> Hi, On Wed, Jan 10, 2001 at 12:11:16PM -0800, Linus Torvalds
> wrote:
>>
>> That said, we can easily support the notion of CLONE_CRED if we
>> absolutely have to (and sane people just shouldn't use it), so
>> if somebody wants to work on this for 2.5.x...
> But is it really worth the pain? I'd hate to have to audit the
> entire VFS to make sure that it works if another thread changes
> our credentials in the middle of a syscall, so we either end up
> having to lock the credentials over every VFS syscall, or take
> a copy of the credentials and pass it through every VFS
> internal call that we make.
What's wrong with copy-on-write style semantics? IOW, anyone who
wants to change the credentials needs to make a private copy of the
existing structure first.
Cheers,
Trond
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next prev parent reply other threads:[~2001-01-11 13:13 UTC|newest]
Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-08 5:29 Wayne Whitney
2001-01-08 5:42 ` Andi Kleen
2001-01-08 6:04 ` Linus Torvalds
2001-01-08 17:44 ` Rik van Riel
2001-01-08 18:02 ` Linus Torvalds
2001-01-08 17:16 ` Rik van Riel
2001-01-08 17:58 ` Linus Torvalds
2001-01-08 23:41 ` Zlatko Calusic
2001-01-09 2:58 ` Linus Torvalds
2001-01-09 6:20 ` Eric W. Biederman
2001-01-09 7:27 ` Linus Torvalds
2001-01-09 11:38 ` Eric W. Biederman
2001-01-09 12:29 ` Zlatko Calusic
2001-01-09 18:47 ` Linus Torvalds
2001-01-09 19:09 ` Daniel Phillips
2001-01-09 19:29 ` Trond Myklebust
2001-01-10 17:32 ` Andi Kleen
2001-01-10 19:31 ` Alan Cox
2001-01-10 19:33 ` Andi Kleen
2001-01-10 19:40 ` Alan Cox
2001-01-10 19:43 ` Andi Kleen
2001-01-10 19:48 ` Alan Cox
2001-01-10 19:48 ` Andi Kleen
2001-01-11 9:51 ` Trond Myklebust
2001-01-10 20:11 ` Linus Torvalds
2001-01-11 12:56 ` Stephen C. Tweedie
2001-01-11 13:10 ` Andi Kleen
2001-01-11 16:50 ` Albert D. Cahalan
2001-01-11 17:35 ` Stephen C. Tweedie
2001-01-11 19:38 ` Albert D. Cahalan
2001-01-11 19:01 ` Alexander Viro
2001-01-11 13:12 ` Trond Myklebust [this message]
2001-01-11 14:13 ` Stephen C. Tweedie
2001-01-11 19:03 ` Alexander Viro
2001-01-11 19:47 ` Stephen C. Tweedie
2001-01-11 19:57 ` Alexander Viro
2001-01-09 19:37 ` Linus Torvalds
2001-01-17 8:46 ` Rik van Riel
2001-01-25 22:51 ` Daniel Phillips
2001-01-09 19:53 ` Simon Kirby
2001-01-09 20:08 ` Linus Torvalds
2001-01-09 20:10 ` Zlatko Calusic
2001-01-10 1:45 ` David Woodhouse
2001-01-10 2:26 ` Andrea Arcangeli
2001-01-10 6:57 ` Linus Torvalds
2001-01-10 11:46 ` David Woodhouse
2001-01-10 14:56 ` Andrea Arcangeli
2001-01-10 17:46 ` Eric W. Biederman
2001-01-10 18:33 ` Andrea Arcangeli
2001-01-17 14:26 ` Rik van Riel
2001-01-10 19:03 ` Linus Torvalds
2001-01-10 19:27 ` David S. Miller
2001-01-10 19:36 ` Alan Cox
2001-01-10 23:56 ` David Weinehall
2001-01-11 0:24 ` Alan Cox
2001-01-12 5:56 ` Ralf Baechle
2001-01-12 16:10 ` Eric W. Biederman
2001-01-12 21:11 ` Russell King
2001-01-15 2:56 ` Ralf Baechle
2001-01-15 6:59 ` Eric W. Biederman
2001-01-15 2:53 ` Ralf Baechle
2001-01-15 8:41 ` Caches, page coloring, virtual indexed caches, and more Eric W. Biederman
2001-01-15 11:54 ` Ralf Baechle
2001-01-15 12:53 ` Anton Blanchard
2001-01-15 17:41 ` Ralf Baechle
2001-01-17 4:36 ` Anton Blanchard
2001-01-16 9:34 ` Eric W. Biederman
2001-01-17 4:43 ` Anton Blanchard
2001-01-17 8:35 ` Eric W. Biederman
2001-01-15 17:16 ` Eric W. Biederman
2001-01-16 4:58 ` Ralf Baechle
2001-01-15 18:22 ` Jamie Lokier
2001-01-15 12:51 ` Anton Blanchard
2001-01-17 14:28 ` Subtle MM bug Rik van Riel
2001-01-18 1:23 ` Linus Torvalds
2001-01-18 11:48 ` Rik van Riel
2001-01-10 17:03 ` Linus Torvalds
2001-01-11 14:36 ` Jim Gettys
2001-01-08 21:30 ` Wayne Whitney
-- strict thread matches above, loose matches on Subject: below --
2001-01-10 19:57 Chris Wing
2001-01-08 20:39 Szabolcs Szakacsits
2001-01-08 21:56 ` Wayne Whitney
2001-01-08 23:22 ` Wayne Whitney
2001-01-08 23:30 ` Andrea Arcangeli
2001-01-09 0:37 ` Linus Torvalds
2001-01-08 22:00 ` Wayne Whitney
2001-01-08 22:15 ` Andrea Arcangeli
2001-01-07 20:59 Zlatko Calusic
2001-01-07 21:37 ` Rik van Riel
2001-01-07 22:33 ` Zlatko Calusic
2001-01-09 2:01 ` Zlatko Calusic
2001-01-17 4:48 ` Rik van Riel
2001-01-17 18:53 ` Zlatko Calusic
2001-01-18 1:32 ` Rik van Riel
2001-04-17 19:37 ` H. Peter Anvin
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