Author: kib
Date: Mon Dec 30 09:04:06 2013
New Revision: 260082
URL: http://svnweb.freebsd.org/changeset/base/260082
Log:
MFC r259951:
Do not coalesce stack entry. Pass MAP_STACK_GROWS_DOWN and
MAP_STACK_GROWS_UP flags to vm_map_insert() from vm_map_stack()
Modified:
stable/9/sys/vm/vm_map.c
Directory Properties:
stable/9/sys/ (props changed)
Modified: stable/9/sys/vm/vm_map.c
==============================================================================
--- stable/9/sys/vm/vm_map.c Mon Dec 30 08:57:54 2013 (r260081)
+++ stable/9/sys/vm/vm_map.c Mon Dec 30 09:04:06 2013 (r260082)
@@ -1230,6 +1230,7 @@ charged:
}
else if ((prev_entry != &map->header) &&
(prev_entry->eflags == protoeflags) &&
+ (cow & (MAP_ENTRY_GROWS_DOWN | MAP_ENTRY_GROWS_UP)) == 0 &&
(prev_entry->end == start) &&
(prev_entry->wired_count == 0) &&
(prev_entry->cred == cred ||
@@ -3341,7 +3342,6 @@ vm_map_stack(vm_map_t map, vm_offset_t a
* NOTE: We explicitly allow bi-directional stacks.
*/
orient = cow & (MAP_STACK_GROWS_DOWN|MAP_STACK_GROWS_UP);
- cow &= ~orient;
KASSERT(orient != 0, ("No stack grow direction"));
if (addrbos < vm_map_min(map) ||
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