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| author | attilio <attilio@FreeBSD.org> | 2009-11-04 01:32:59 +0000 |
|---|---|---|
| committer | attilio <attilio@FreeBSD.org> | 2009-11-04 01:32:59 +0000 |
| commit | 68e40aae5fc21f7296db7a8328b1ebb5d8683c1b (patch) | |
| tree | 237457e82c0af41da784995938264934515de402 /sys/vm/vm_phys.c | |
| parent | f9efe0335684909e08cb425bae838b98bdce4e6a (diff) | |
| download | FreeBSD-src-68e40aae5fc21f7296db7a8328b1ebb5d8683c1b.zip FreeBSD-src-68e40aae5fc21f7296db7a8328b1ebb5d8683c1b.tar.gz | |
Opteron rev E family of processor expose a bug where, in very rare
ocassions, memory barriers semantic is not honoured by the hardware
itself. As a result, some random breakage can happen in uninvestigable
ways (for further explanation see at the content of the commit itself).
As long as just a specific familly is bugged of an entire architecture
is broken, a complete fix-up is impratical without harming to some
extents the other correct cases.
Considering that (and considering the frequency of the bug exposure)
just print out a warning message if the affected machine is identified.
Pointed out by: Samy Al Bahra <sbahra at repnop dot org>
Help on wordings by: jeff
MFC: 3 days
Diffstat (limited to 'sys/vm/vm_phys.c')
0 files changed, 0 insertions, 0 deletions
