Messages in this thread | | | Date | Thu, 01 Aug 2002 18:19:44 -0700 (PDT) | Subject | Re: large page patch | From | "David S. Miller" <> |
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From: Andrew Morton <akpm@zip.com.au> Date: Thu, 01 Aug 2002 18:26:40 -0700
"David S. Miller" wrote: > This is probably done to increase the likelyhood that 4MB page orders > are available. If we collapse 4MB pages deeper, they are less likely > to be broken up because smaller orders would be selected first. This is leakage from ia64, which supports up to 256k pages.
Ummm, 4MB > 256K and even with a 4K PAGE_SIZE MAX_ORDER coalesces up to 4MB already :-) Apparently a page-table based representation could not be used by PPC. The page-table is just an abstraction, there is no reason dummy "large" ptes could not be used which are just ignored by the HW TLB reload code. - 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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