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> > fall back to smaller pages if possible (I was told it isn't easily > > possible on IA64) > > That's not entirely true. Whether it's feasible depends on how the > MMU is used. The HPW (Hardware Pagetable Walker) and short mode of the > VHPT insist upon pagesize being a per-region attribute, where regions > are something like 60-bit areas of virtualspace, which is likely what > they're referring to. The VHPT in long mode should be capable of > arbitrary virtual placement (modulo alignment of course). Redesigning the low level TLB fault handling for this would not count as "easily" in my book. -Andi - 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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