On 01/12/2014 05:44 PM, Joonsoo Kim wrote: > We only touch one struct page on small allocation. > In 64-byte case, we always use one cacheline for touching struct page, since > it is aligned to cacheline size. However, in 56-byte case, we possibly use > two cachelines because struct page isn't aligned to cacheline size. I think you're completely correct that this can _happen_, but I'm a bit unconvinced that what you're talking about is the thing which dominates the results. I'm sure it plays a role, but the tests I was doing were doing tens of millions of allocations and touching a _lot_ of 'struct pages'. I would not expect these effects to be observable across such a large sample of pages. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>