diff options
| author | dg <dg@FreeBSD.org> | 1994-04-25 23:48:20 +0000 |
|---|---|---|
| committer | dg <dg@FreeBSD.org> | 1994-04-25 23:48:20 +0000 |
| commit | bac3b7fca5322738bda4ead89c3871c594baeda7 (patch) | |
| tree | b1cb994ebbc27667fbb9c38fb1c7c83799ca3436 /sys/amd64 | |
| parent | 92d62265a95af2d261c74876dd628adf139f16e3 (diff) | |
| download | FreeBSD-src-bac3b7fca5322738bda4ead89c3871c594baeda7.zip FreeBSD-src-bac3b7fca5322738bda4ead89c3871c594baeda7.tar.gz | |
From John Dyson:
Fixed physio in the 386 case - write faults weren't properly implemented.
Diffstat (limited to 'sys/amd64')
| -rw-r--r-- | sys/amd64/amd64/vm_machdep.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/sys/amd64/amd64/vm_machdep.c b/sys/amd64/amd64/vm_machdep.c index 89eb127..a892c29 100644 --- a/sys/amd64/amd64/vm_machdep.c +++ b/sys/amd64/amd64/vm_machdep.c @@ -38,7 +38,7 @@ * * from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91 * Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$ - * $Id: vm_machdep.c,v 1.19 1994/04/14 07:49:40 davidg Exp $ + * $Id: vm_machdep.c,v 1.20 1994/04/20 07:06:20 davidg Exp $ */ #include "npx.h" @@ -594,14 +594,12 @@ cldisksort(struct buf *dp, struct buf *bp, vm_offset_t maxio) insert: -#if 0 /* * read clustering with new read-ahead disk drives hurts mostly, so * we don't bother... */ if( bp->b_flags & B_READ) goto nocluster; -#endif /* * we currently only cluster I/O transfers that are at page-aligned * kvas and transfers that are multiples of page lengths. @@ -830,6 +828,25 @@ nocluster: bp->av_back = ap; } +/* + * quick version of vm_fault + */ + +void +vm_fault_quick( v, prot) + vm_offset_t v; + int prot; +{ + if( (cpu_class == CPUCLASS_386) && + (prot & VM_PROT_WRITE)) + vm_fault(&curproc->p_vmspace->vm_map, v, + VM_PROT_READ|VM_PROT_WRITE, FALSE); + else if( prot & VM_PROT_WRITE) + *(volatile char *)v += 0; + else + *(volatile char *)v; +} + /* * Finish a fork operation, with process p2 nearly set up. |
