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Use ltsleep in a loop instead of simple_unlock/tsleep/goto try_again

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sommerfeld 2000-08-12 17:44:02 +00:00
parent 7d96bc05ba
commit 41c6473b10
1 changed files with 3 additions and 5 deletions
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8
sys/uvm/uvm_map.h
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@ -1,4 +1,4 @@
/* $NetBSD: uvm_map.h,v 1.19 2000/06/26 17:18:40 mrg Exp $ */
/* $NetBSD: uvm_map.h,v 1.20 2000/08/12 17:44:02 sommerfeld Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
@ -423,11 +423,9 @@ vm_map_lock(map)
try_again:
simple_lock(&map->flags_lock);
if (map->flags & VM_MAP_BUSY) {
while (map->flags & VM_MAP_BUSY) {
map->flags |= VM_MAP_WANTLOCK;
simple_unlock(&map->flags_lock);
(void) tsleep(&map->flags, PVM, "vmmapbsy", 0);
goto try_again;
ltsleep(&map->flags, PVM, "vmmapbsy", 0, &map->flags_lock);
}
error = lockmgr(&map->lock, LK_EXCLUSIVE|LK_SLEEPFAIL|LK_INTERLOCK,