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Bug #2320 » forklock-fix1.patch

c.turner1, 03/07/2012 12:56 PM

View differences:

sys/vm/vm_fault.c
* Allocate a page in the destination object
*/
do {
vm_object_lock(dst_object);
dst_m = vm_page_alloc(dst_object,
OFF_TO_IDX(dst_offset),
VM_ALLOC_NORMAL);
vm_object_unlock(dst_object);
if (dst_m == NULL) {
vm_wait(0);
}
......
* (Because the source is wired down, the page will be in
* memory.)
*/
vm_object_lock(src_object);
src_m = vm_page_lookup(src_object,
OFF_TO_IDX(dst_offset + src_offset));
vm_object_unlock(src_object);
if (src_m == NULL)
panic("vm_fault_copy_wired: page missing");
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