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There was a bug that the size for an msync'ed region was not rounded

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up.  The effect of this was that msync with a size would generally sync
1 page less than it should.  This problem was brought to my attention
by Darrel Herbst <dherbst@gradin.cis.upenn.edu> and Ron Minnich
<rminnich@sarnoff.com>.
This commit is contained in:
John Dyson 1995-12-13 12:28:39 +00:00
parent 7c5a56b547
commit 3048c51216
1 changed files with 2 additions and 2 deletions
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4
sys/vm/vm_mmap.c
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@ -38,7 +38,7 @@
* from: Utah $Hdr: vm_mmap.c 1.6 91/10/21$ * from: Utah $Hdr: vm_mmap.c 1.6 91/10/21$
* *
* @(#)vm_mmap.c 8.4 (Berkeley) 1/12/94 * @(#)vm_mmap.c 8.4 (Berkeley) 1/12/94
* $Id: vm_mmap.c,v 1.31 1995/12/07 12:48:19 davidg Exp $ * $Id: vm_mmap.c,v 1.32 1995/12/11 04:58:17 dyson Exp $
*/ */
/* /*
@ -329,7 +329,7 @@ msync(p, uap, retval)
map = &p->p_vmspace->vm_map; map = &p->p_vmspace->vm_map;
addr = (vm_offset_t) uap->addr; addr = (vm_offset_t) uap->addr;
size = (vm_size_t) uap->len; size = round_page((vm_size_t) uap->len);
flags = uap->flags; flags = uap->flags;
if (((int) addr & PAGE_MASK) || addr + size < addr || if (((int) addr & PAGE_MASK) || addr + size < addr ||