CVS commit: src/sys/arch

["Maxime Villard" <maxv%netbsd.org@localhost>]

Module Name:    src
Committed By:   maxv
Date:           Thu Feb 22 13:27:18 UTC 2018

Modified Files:
        src/sys/arch/amd64/amd64: machdep.c
        src/sys/arch/amd64/include: pmap.h
        src/sys/arch/x86/x86: cpu.c svs.c x86_machdep.c

Log Message:
Remove svs_pgg_update(). Instead of manually changing PG_G on each page,
we can disable the global-paging mechanism in %cr4 with CR4_PGE. Do that.

In addition, install CR4_PGE when SVS is disabled manually (via the
sysctl).

Now, doing "sysctl -w machdep.svs_enabled=0" restores the performance
completely, exactly as if SVS hadn't been enabled in the first place.


To generate a diff of this commit:
cvs rdiff -u -r1.300 -r1.301 src/sys/arch/amd64/amd64/machdep.c
cvs rdiff -u -r1.44 -r1.45 src/sys/arch/amd64/include/pmap.h
cvs rdiff -u -r1.148 -r1.149 src/sys/arch/x86/x86/cpu.c
cvs rdiff -u -r1.7 -r1.8 src/sys/arch/x86/x86/svs.c
cvs rdiff -u -r1.106 -r1.107 src/sys/arch/x86/x86/x86_machdep.c

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