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Nick Piggin wrote: > > > Nick Piggin wrote: > >> >> Lowmem pagecache vs highmem pagecache should be balanced correctly? >> I think it is with your other patches. >> >> Lowmem pagecache vs slab should be balanced correctly with my patch. >> >> Therefore highmem vs slab will be balanced correctly. >> >> Is that a good proof? >> >> > > Well no, because you can construct a similar "proof" for your > patch because I assume balancing between zones is a two way > operation :P. Actually, lowmem pressure does not assert highmem > pressure which is the point where your balancing fails. > > Humph. OK you're right. The above is of course right when all else is equal, however slab can only be allocated from lowmem while pagecache can come from anywhere. So if you have 500MB of slab and 100MB of cache in lowmem, but 10000MB cache in highmem, lowmem pressure should be shrinking more cache than slab. Nick - 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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