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Release the free page queues lock earlier in vm_page_alloc(). 

Discussed with:	kib@
This commit is contained in:
Alan Cox 2011-01-30 23:55:48 +00:00
parent b9f696953d
commit 3d05198e23
1 changed files with 7 additions and 2 deletions
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9
sys/vm/vm_page.c
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@ -1318,7 +1318,8 @@ vm_page_alloc(vm_object_t object, vm_pindex_t pindex, int req)
}
/*
* Initialize structure. Only the PG_ZERO flag is inherited.
* Only the PG_ZERO flag is inherited. The PG_CACHED or PG_FREE flag
* must be cleared before the free page queues lock is released.
*/
flags = 0;
if (m->flags & PG_ZERO) {
@ -1329,15 +1330,19 @@ vm_page_alloc(vm_object_t object, vm_pindex_t pindex, int req)
if (object == NULL || object->type == OBJT_PHYS)
flags |= PG_UNMANAGED;
m->flags = flags;
mtx_unlock(&vm_page_queue_free_mtx);
if (req & (VM_ALLOC_NOBUSY | VM_ALLOC_NOOBJ))
m->oflags = 0;
else
m->oflags = VPO_BUSY;
if (req & VM_ALLOC_WIRED) {
/*
* The page lock is not required for wiring a page until that
* page is inserted into the object.
*/
atomic_add_int(&cnt.v_wire_count, 1);
m->wire_count = 1;
}
mtx_unlock(&vm_page_queue_free_mtx);
m->act_count = 0;
if (object != NULL) {