Messages in this thread | | | Date | Mon, 5 Feb 2018 13:30:13 +0800 | From | Aaron Lu <> | Subject | RFC: eliminate zone->lock contention for will-it-scale/page_fault1 on big server |
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In addition the the two patches, there are two more patches that I would like to get some feedback.
The two patches are more radical: the 3rd deals with free path zone->lock contention by avoiding doing any merge for order0 pages while the 4th deals with allocation path zone->lock contention by taking pcp->batch pages off the free_area order0 list without the need to iterate the list.
Both patches are developed based on "the most time consuming part of operations under zone->lock is cache misses on struct page".
The 3rd patch may be controversial but doesn't have correctness problem; the 4th is in an early stage and serves only as a proof-of-concept.
Your comments are appreciated, thanks.
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