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Fix vm object creation locking to allow SHARED vnode locking for vnode_create_vobject.

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Noticed by: kib@
This commit is contained in:
Stephan Uphoff 2008-06-12 20:46:47 +00:00
parent d3532631de
commit 11be8415c9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=179765
1 changed files with 7 additions and 6 deletions
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13
sys/vm/vnode_pager.c
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@ -225,20 +225,21 @@ vnode_pager_alloc(void *handle, vm_ooffset_t size, vm_prot_t prot,
object->handle = handle;
if (VFS_NEEDSGIANT(vp->v_mount))
vm_object_set_flag(object, OBJ_NEEDGIANT);
VM_OBJECT_LOCK(object);
if ( vp->v_object != NULL) {
VI_LOCK(vp);
if (vp->v_object != NULL) {
/*
* Object has been created while we were sleeping
*/
VM_OBJECT_UNLOCK(object);
VI_UNLOCK(vp);
vm_object_destroy(object);
goto retry;
}
vp->v_object = object;
} else
VI_UNLOCK(vp);
} else {
object->ref_count++;
VM_OBJECT_UNLOCK(object);
VM_OBJECT_UNLOCK(object);
}
vref(vp);
return (object);
}