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| author | ps <ps@FreeBSD.org> | 2000-10-17 10:05:49 +0000 |
|---|---|---|
| committer | ps <ps@FreeBSD.org> | 2000-10-17 10:05:49 +0000 |
| commit | c71ac689e04ce39d113325e3854477539dae464c (patch) | |
| tree | 331cd4cbe2e1e3d9d7734fa4fce3e6a5554d434c /sys/vm/pmap.h | |
| parent | 26207dd1489dfcba9ad2215401292904446e000a (diff) | |
| download | FreeBSD-src-c71ac689e04ce39d113325e3854477539dae464c.zip FreeBSD-src-c71ac689e04ce39d113325e3854477539dae464c.tar.gz | |
Implement write combining for crashdumps. This is useful when
write caching is disabled on both SCSI and IDE disks where large
memory dumps could take up to an hour to complete.
Taking an i386 scsi based system with 512MB of ram and timing (in
seconds) how long it took to complete a dump, the following results
were obtained:
Before: After:
WCE TIME WCE TIME
------------------ ------------------
1 141.820972 1 15.600111
0 797.265072 0 65.480465
Obtained from: Yahoo!
Reviewed by: peter
Diffstat (limited to 'sys/vm/pmap.h')
| -rw-r--r-- | sys/vm/pmap.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/vm/pmap.h b/sys/vm/pmap.h index b6afa93..1aca49d 100644 --- a/sys/vm/pmap.h +++ b/sys/vm/pmap.h @@ -140,7 +140,7 @@ void pmap_swapout_proc __P((struct proc *p)); void pmap_swapin_proc __P((struct proc *p)); void pmap_activate __P((struct proc *p)); vm_offset_t pmap_addr_hint __P((vm_object_t obj, vm_offset_t addr, vm_size_t size)); -void *pmap_kenter_temporary __P((vm_offset_t pa)); +void *pmap_kenter_temporary __P((vm_offset_t pa, int i)); void pmap_init2 __P((void)); #endif /* _KERNEL */ |
