Messages in this thread | | | Date | Tue, 13 Feb 2001 00:05:50 -0200 (BRST) | From | Marcelo Tosatti <> | Subject | Re: [PATCH] guard mm->rss with page_table_lock (241p11) |
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On Mon, 12 Feb 2001, george anzinger wrote:
> Excuse me if I am off base here, but wouldn't an atomic operation be > better here. There are atomic inc/dec and add/sub macros for this. It > just seems that that is all that is needed here (from inspection of the > patch).
Most functions which touch mm->rss already hold mm->page_table_lock (also this functions are called more often and they use more CPU).
Making those functions use an atomic instruction just to optimize the functions which do not lock mm->page_table_lock is not a good tradeoff.
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