Messages in this thread | | | From | Andy Lutomirski <> | Date | Tue, 15 Jul 2014 12:56:57 -0700 | Subject | Re: [RFC PATCH 3/11] x86, mm, pat: Change reserve_memtype() to handle WT type |
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On Tue, Jul 15, 2014 at 12:34 PM, Toshi Kani <toshi.kani@hp.com> wrote: > This patch changes reserve_memtype() to handle the new WT type. > When (!pat_enabled && new_type), it continues to set either WB > or UC- to *new_type. When pat_enabled, it can reserve a given > non-RAM range for WT. At this point, it may not reserve a RAM > range for WT since reserve_ram_pages_type() uses the page flags > limited to three memory types, WB, WC and UC.
FWIW, last time I looked at this, it seemed like all the fancy reserve_ram_pages stuff was unnecessary: shouldn't the RAM type be easy to track in the direct map page tables?
--Andy
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