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When calling vget() on a vnode-backed vm object, acquire the vnode

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interlock before releasing the vm object's lock.
This commit is contained in:
alc 2003-09-17 06:55:42 +00:00
parent 9fef1a54f6
commit eb3ecef7c8
1 changed files with 3 additions and 2 deletions
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5
sys/vm/vm_pageout.c
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@ -926,13 +926,14 @@ rescan0:
*/
if (object->type == OBJT_VNODE) {
vp = object->handle;
mp = NULL;
if (vp->v_type == VREG)
vn_start_write(vp, &mp, V_NOWAIT);
vm_page_unlock_queues();
VI_LOCK(vp);
VM_OBJECT_UNLOCK(object);
if (vget(vp, LK_EXCLUSIVE|LK_TIMELOCK, curthread)) {
if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK |
LK_TIMELOCK, curthread)) {
VM_OBJECT_LOCK(object);
vm_page_lock_queues();
++pageout_lock_miss;