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Nick Piggin wrote: > Eric Dumazet wrote: > >>> Two things can happen here. >>> >>> If this program used the pages before the kernel needed >>> them, the program will be reusing its old pages. >> >> >> >> ah ok, this is because accessed/dirty bits are set by hardware and not >> a page fault. > > > No it isn't. That is to say, it isn't required for correctness. But if the question was about avoiding a fault, then yes ;) But as Linus recently said, even hardware handled faults still take expensive microarchitectural traps. > >> Is it true for all architectures ? > > > No. > -- SUSE Labs, Novell Inc. - 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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