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author | alc <alc@FreeBSD.org> | 2008-08-09 05:46:13 +0000 |
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committer | alc <alc@FreeBSD.org> | 2008-08-09 05:46:13 +0000 |
commit | d53364aaabf956c53fb21accf05741dc91b4d975 (patch) | |
tree | 6b2432e4944be12c133f438bfdb0e562a299bb0c /share/man/man5 | |
parent | 38a3b8ee43fac3f029495ef12f790b4300865e08 (diff) | |
download | FreeBSD-src-d53364aaabf956c53fb21accf05741dc91b4d975.zip FreeBSD-src-d53364aaabf956c53fb21accf05741dc91b4d975.tar.gz |
Intel describes the behavior of their processors as "undefined" if two or
more mappings to the same physical page have different memory types, i.e.,
PAT settings. Consequently, if pmap_change_attr() is applied to a virtual
address range within the kernel map, then the corresponding ranges of the
direct map also need to be changed. Enhance pmap_change_attr() to handle
this case automatically.
Add a comment describing what pmap_change_attr() does.
Discussed with: jhb
Diffstat (limited to 'share/man/man5')
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