CVS commit: src/sys/arch

[Andrew Doran <ad%netbsd.org@localhost>]

Module Name:    src
Committed By:   ad
Date:           Fri Apr 24 17:45:40 UTC 2009

Modified Files:
        src/sys/arch/amd64/amd64: lock_stubs.S
        src/sys/arch/i386/i386: lock_stubs.S
        src/sys/arch/x86/x86: patch.c

Log Message:
A workaround for a bug with some Opteron revisions where locked operations
sometimes do not serve as memory barriers, allowing memory references to
bleed outside of critical sections.  It's possible that this is the
reason for pkgbuild's longstanding crashiness.

This is not complete (atomic ops need some work too).


To generate a diff of this commit:
cvs rdiff -u -r1.21 -r1.22 src/sys/arch/amd64/amd64/lock_stubs.S
cvs rdiff -u -r1.22 -r1.23 src/sys/arch/i386/i386/lock_stubs.S
cvs rdiff -u -r1.17 -r1.18 src/sys/arch/x86/x86/patch.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.