Messages in this thread | | | Date | Fri, 19 Nov 2004 17:58:25 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: page fault scalability patch V11 [0/7]: overview |
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On Fri, 19 Nov 2004, Christoph Lameter wrote: > > Note though that the mmap_sem is no protection. It is a read lock and may > be held by multiple processes while incrementing and decrementing rss. > This is likely reducing the number of collisions significantly but it wont > be a guarantee like locking or atomic ops.
It is, though, if you hold it for a write.
The point being that you _can_ get an exact rss value if you want to.
Not that I really see any overwhelming evidence of anybody ever really caring, but it's nice to know that you have the option.
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