From: Keith Owens <kaos@ocs.com.au>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: prumpf@mandrakesoft.com (Philipp Rumpf), linux-kernel@vger.kernel.org
Subject: Re: Linux 2.4.1-ac15
Date: Mon, 19 Feb 2001 22:54:39 +1100 [thread overview]
Message-ID: <30069.982583679@ocs3.ocs-net> (raw)
In-Reply-To: Your message of "Mon, 19 Feb 2001 11:35:08 -0000." <E14Uob0-0003Cs-00@the-village.bc.nu>
On Mon, 19 Feb 2001 11:35:08 +0000 (GMT),
Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
>The problem isnt running module code. What happens in this case
>
> mod->next = module_list;
> module_list = mod; /* link it in */
>
>Note no write barrier.
<humour>It works on ix86 so the code must be right</humour>
>Delete is even worse
>
>We unlink the module
>We free the memory
>
>At the same time another cpu may be walking the exception table that we free.
Another good reason why locking modules via use counts from external
code is not the right fix. We definitely need a quiesce model for
module removal.
next prev parent reply other threads:[~2001-02-19 11:55 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-02-15 23:15 Linux 2.4.1-ac15 Alan Cox
2001-02-19 9:47 ` Philipp Rumpf
2001-02-19 11:35 ` Alan Cox
2001-02-19 11:54 ` Philipp Rumpf
2001-02-19 16:03 ` Alan Cox
2001-02-19 16:21 ` Philipp Rumpf
2001-02-19 16:27 ` Alan Cox
2001-02-19 16:34 ` Philipp Rumpf
2001-02-19 16:41 ` Alan Cox
2001-02-19 16:48 ` Philipp Rumpf
2001-02-19 17:03 ` Alan Cox
2001-02-21 3:02 ` Rusty Russell
2001-02-21 12:01 ` Alan Cox
2001-02-22 2:05 ` Rusty Russell
2001-02-22 10:22 ` Alan Cox
2001-02-23 0:01 ` Philipp Rumpf
2001-02-22 2:27 ` Linus Torvalds
2001-02-22 10:29 ` Alan Cox
2001-02-23 20:40 ` Andrea Arcangeli
2001-02-23 21:09 ` Linus Torvalds
2001-02-24 4:04 ` Andrea Arcangeli
2001-02-24 4:54 ` Andrea Arcangeli
2001-02-19 11:54 ` Keith Owens [this message]
2001-02-19 12:15 ` Philipp Rumpf
2001-02-19 13:15 ` Keith Owens
2001-02-19 13:25 ` Christoph Hellwig
2001-02-19 21:32 ` Keith Owens
2001-02-19 13:36 ` Philipp Rumpf
2001-02-19 15:23 ` Manfred Spraul
2001-02-19 16:04 ` Alan Cox
2001-02-19 21:52 ` Keith Owens
2001-02-20 12:29 ` Philipp Rumpf
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