Messages in this thread | | | Date | Sat, 24 Mar 2001 22:05:18 -0300 (BRST) | From | Rik van Riel <> | Subject | Re: [PATCH] Fix races in 2.4.2-ac22 SysV shared memory |
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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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