Re: [PATCH] guard mm->rss with page_table_lock (241p11)

From: Marcelo Tosatti (
Date: Mon Feb 12 2001 - 21:05:50 EST

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.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

This archive was generated by hypermail 2b29 : Thu Feb 15 2001 - 21:00:20 EST