Messages in this thread | | | Date | Mon, 16 Aug 2004 08:18:11 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: page fault fastpath: Increasing SMP scalability by introducing pte locks? |
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On Mon, 16 Aug 2004, Ray Bryant wrote:
> Something else to worry about here is mm->rss. Previously, this was updated > only with the page_table_lock held, so concurrent increments were not a > problem. rss may need to converted be an atomic_t if you use pte_locks. > It may be that an approximate value for rss is good enough, but I'm not sure > how to bound the error that could be introduced by a couple of hundred > processers handling page faults in parallel and updating rss without locking > it or making it an atomic_t.
Correct. There are a number of issues that may have to be addressed but first we need to agree on a general idea how to proceed.
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