The following code excerpt from shrink_list function.
I think if condition B is true ,then condition A must
be true.So there have no chance of excuting the
condition B's code(when it's).
referenced = page_referenced(page, 1);
/* In active use or really unfreeable? Activate it.
*/
if (referenced && page_mapping_inuse(page))
//condition A
goto activate_locked;
.....
/*
* The page is mapped into the page tables of one or
more
* processes. Try to unmap it here.
*/
if (page_mapped(page) && mapping) { //condition B
Anyone's comments appreciated!
Best Regards!
Bao Zhao
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