Date: Sat, 27 Feb 2010 18:00:57 +0000 (UTC) From: Alan Cox <alc@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/amd64/amd64 pmap.c src/sys/i386/i386 pmap.c src/sys/kern subr_param.c src/sys/sys systm.h Message-ID: <201002271811.o1RIBGqx095035@repoman.freebsd.org>
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alc 2010-02-27 18:00:57 UTC
FreeBSD src repository
Modified files:
sys/amd64/amd64 pmap.c
sys/i386/i386 pmap.c
sys/kern subr_param.c
sys/sys systm.h
Log:
SVN rev 204420 on 2010-02-27 18:00:57Z by alc
When running as a guest operating system, the FreeBSD kernel must assume
that the virtual machine monitor has enabled machine check exceptions.
Unfortunately, on AMD Family 10h processors the machine check hardware
has a bug (Erratum 383) that can result in a false machine check exception
when a superpage promotion occurs. Thus, I am disabling superpage
promotion when the FreeBSD kernel is running as a guest operating system
on an AMD Family 10h processor.
Reviewed by: jhb, kib
MFC after: 3 days
Revision Changes Path
1.682 +9 -0 src/sys/amd64/amd64/pmap.c
1.663 +9 -0 src/sys/i386/i386/pmap.c
1.93 +4 -4 src/sys/kern/subr_param.c
1.283 +3 -0 src/sys/sys/systm.h
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