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| author | alfred <alfred@FreeBSD.org> | 2012-11-10 02:08:40 +0000 |
|---|---|---|
| committer | alfred <alfred@FreeBSD.org> | 2012-11-10 02:08:40 +0000 |
| commit | 7beb738c8a72cc197d3e898784afe3fba28f1834 (patch) | |
| tree | 2d08cbee7278cd7eea9a43b81a23320e35210c05 /sys/i386 | |
| parent | 8e1fdec2c76a948b16ebf8e4abe2cb73a60d3477 (diff) | |
| download | FreeBSD-src-7beb738c8a72cc197d3e898784afe3fba28f1834.zip FreeBSD-src-7beb738c8a72cc197d3e898784afe3fba28f1834.tar.gz | |
Allow maxusers to scale on machines with large address space.
Some hooks are added to clamp down maxusers and nmbclusters for
small address space systems.
VM_MAX_AUTOTUNE_MAXUSERS - the max maxusers that will be autotuned based on
physical memory.
VM_MAX_AUTOTUNE_NMBCLUSTERS - max nmbclusters based on physical memory.
These are set to the old values on i386 to preserve the clamping that was
being done to all arches.
Another macro VM_AUTOTUNE_NMBCLUSTERS is provided to allow an override
for the calculation on a MD basis. Currently no arch defines this.
Reviewed by: peter
MFC after: 2 weeks
Diffstat (limited to 'sys/i386')
| -rw-r--r-- | sys/i386/include/vmparam.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sys/i386/include/vmparam.h b/sys/i386/include/vmparam.h index ce6672d..9cfd692 100644 --- a/sys/i386/include/vmparam.h +++ b/sys/i386/include/vmparam.h @@ -202,4 +202,13 @@ #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */ +#ifndef VM_MAX_AUTOTUNE_MAXUSERS +#define VM_MAX_AUTOTUNE_MAXUSERS 384 +#endif + +#ifndef VM_MAX_AUTOTUNE_NMBCLUSTERS +/* old maxusers max value. */ +#define VM_MAX_AUTOTUNE_NMBCLUSTERS (1024 + VM_MAX_AUTOTUNE_MAXUSERS * 64) +#endif + #endif /* _MACHINE_VMPARAM_H_ */ |
