Author: kib
Date: Sun Apr 29 10:04:20 2012
New Revision: 234784
URL: http://svn.freebsd.org/changeset/base/234784
Log:
MFC r234556:
When MAP_STACK mapping is created, the map entry is created only to
cover the initial stack size. For MCL_WIREFUTURE maps, the subsequent
call to vm_map_wire() to wire the whole stack region fails due to
VM_MAP_WIRE_NOHOLES flag.
Use the VM_MAP_WIRE_HOLESOK to only wire mapped part of the stack.
Modified:
stable/8/sys/vm/vm_mmap.c
Directory Properties:
stable/8/sys/ (props changed)
Modified: stable/8/sys/vm/vm_mmap.c
==============================================================================
--- stable/8/sys/vm/vm_mmap.c Sun Apr 29 09:37:02 2012 (r234783)
+++ stable/8/sys/vm/vm_mmap.c Sun Apr 29 10:04:20 2012 (r234784)
@@ -1435,7 +1435,8 @@ vm_mmap(vm_map_t map, vm_offset_t *addr,
*/
if ((rv == KERN_SUCCESS) && (map->flags & MAP_WIREFUTURE))
vm_map_wire(map, *addr, *addr + size,
- VM_MAP_WIRE_USER|VM_MAP_WIRE_NOHOLES);
+ VM_MAP_WIRE_USER | ((flags & MAP_STACK) ?
+ VM_MAP_WIRE_HOLESOK : VM_MAP_WIRE_NOHOLES));
return (vm_mmap_to_errno(rv));
}
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