Alan Cox
13de722155
An addendum to r195649, "Add support to the virtual memory system for
...
configuring machine-dependent memory attributes...":
Don't set the memory attribute for a "real" page that is allocated to
a device object in vm_page_alloc(). It is a pointless act, because
the device pager replaces this "real" page with a "fake" page and sets
the memory attribute on that "fake" page.
Eliminate pointless code from pmap_cache_bits() on amd64.
Employ the "Self Snoop" feature supported by some x86 processors to
avoid cache flushes in the pmap.
Approved by: re (kib)
2009-07-18 01:50:05 +00:00
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