Date: Sun, 29 Apr 2012 10:04:20 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r234784 - stable/8/sys/vm Message-ID: <201204291004.q3TA4KQt008400@svn.freebsd.org>
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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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