Kai Gallasch <gallasch_at_free.de> writes: > I installed 8.0RC2-amd64 on an 8-core opteron server a few days ago. > > When I try to do a make buildworld or make buildkernel the server > reboots without any message left in the logs. The same happens > when building bigger ports (for example ruby18 or perl58) Could it be related to this? What's your CPUID? Author: attilio Date: Wed Nov 4 01:32:59 2009 New Revision: 198868 URL: http://svn.freebsd.org/changeset/base/198868 Log: 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 Modified: head/sys/amd64/amd64/identcpu.c head/sys/i386/i386/identcpu.c DES -- Dag-Erling Smørgrav - des_at_des.noReceived on Wed Nov 04 2009 - 14:24:02 UTC
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