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uvm_mmap: don't lock the map unless we need to.

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This commit is contained in:
ad 2008-06-03 21:48:27 +00:00
parent d46fe4da98
commit da4bdc8954
1 changed files with 3 additions and 4 deletions
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7
sys/uvm/uvm_mmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: uvm_mmap.c,v 1.125 2008/06/02 16:17:12 ad Exp $ */
/* $NetBSD: uvm_mmap.c,v 1.126 2008/06/03 21:48:27 ad Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
@ -51,7 +51,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uvm_mmap.c,v 1.125 2008/06/02 16:17:12 ad Exp $");
__KERNEL_RCSID(0, "$NetBSD: uvm_mmap.c,v 1.126 2008/06/03 21:48:27 ad Exp $");
#include "opt_compat_netbsd.h"
#include "opt_pax.h"
@ -1235,8 +1235,8 @@ uvm_mmap(map, addr, size, prot, maxprot, flags, handle, foff, locklimit)
return (0);
}
vm_map_lock(map);
if ((flags & MAP_WIRED) != 0 || (map->flags & VM_MAP_WIREFUTURE) != 0) {
vm_map_lock(map);
if (atop(size) + uvmexp.wired > uvmexp.wiredmax ||
(locklimit != 0 &&
size + ptoa(pmap_wired_count(vm_map_pmap(map))) >
@ -1258,7 +1258,6 @@ uvm_mmap(map, addr, size, prot, maxprot, flags, handle, foff, locklimit)
}
return (0);
}
vm_map_unlock(map);
return 0;
}