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When one tries to allocate memory with the M_WAITOK flag and we are short in

Browse source 
address space in kmem map call vm_lowmem event in a loop and wait a bit for
subsystems to reclaim some memory which in turn will reclaim address space as
well.

Note, this is a work-around.

Reviewed by:	alc
Approved by:	alc
MFC after:	3 days
This commit is contained in:
Pawel Jakub Dawidek 2008-01-10 08:36:38 +00:00
parent 10b16b260c
commit 79c2840d1d
1 changed files with 13 additions and 6 deletions
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19
sys/vm/vm_kern.c
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@ -296,14 +296,21 @@ kmem_malloc(map, size, flags)
vm_map_lock(map);
if (vm_map_findspace(map, vm_map_min(map), size, &addr)) {
vm_map_unlock(map);
if ((flags & M_NOWAIT) == 0) {
EVENTHANDLER_INVOKE(vm_lowmem, 0);
uma_reclaim();
vm_map_lock(map);
if (vm_map_findspace(map, vm_map_min(map), size, &addr)) {
if ((flags & M_NOWAIT) == 0) {
for (i = 0; i < 8; i++) {
EVENTHANDLER_INVOKE(vm_lowmem, 0);
uma_reclaim();
vm_map_lock(map);
if (vm_map_findspace(map, vm_map_min(map),
size, &addr) == 0) {
break;
}
vm_map_unlock(map);
tsleep(&i, 0, "nokva", (hz / 4) * (i + 1));
}
if (i == 8) {
panic("kmem_malloc(%ld): kmem_map too small: %ld total allocated",
(long)size, (long)map->size);
(long)size, (long)map->size);
}
} else {
return (0);