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Hi > > I don't think so. > > all modern many cpu machine stand on NUMA. > > it mean following, > > - if cpu increases, then zone increases, too. > > > > if default value increase by #cpus, lock contension dramatically increase > > on large numa. > > > > Have I overlooked anything? > > > How about adding something like.. > == > CONFIG_SIMULTANEOUS_PAGE_RECLAIMERS > int > default 3 > depends on DEBUG > help > This value determines the number of threads which can do page reclaim > in a zone simultaneously. If this is too big, performance under heavy memory > pressure will decrease. > If unsure, use default. > == > > Then, you can get performance reports from people interested in this > feature in test cycle. hm, intersting. but sysctl parameter is more better, i think. OK, I'll add it at next post. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | |||||||||
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