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SubjectRe: [PATCH] Fix races in 2.4.2-ac22 SysV shared memory
On Sun, 25 Mar 2001, Stephen C. Tweedie wrote:

> Rik, do you think it is really necessary to take the page lock and
> release it inside lookup_swap_cache? I may be overlooking something,
> but I can't see the benefit of it ---

I don't think we need to do this, except to protect us from
using a page which isn't up-to-date yet and locked because
of disk IO.

Reclaim_page() takes the pagecache_lock before trying to
free anything, so there's no reason to lock against that.

regards,

Rik
--
Virtual memory is like a game you can't win;
However, without VM there's truly nothing to lose...

http://www.surriel.com/
http://www.conectiva.com/ http://distro.conectiva.com.br/

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