On 2/14/24 18:01, Oscar Salvador wrote: > page_owner needs to increment a stack_record refcount when a new allocation > occurs, and decrement it on a free operation. > In order to do that, we need to have a way to get a stack_record from a > handle. > Implement __stack_depot_get_stack_record() which just does that, and make > it public so page_owner can use it. > > Also, traversing all stackdepot buckets comes with its own complexity, > plus we would have to implement a way to mark only those stack_records > that were originated from page_owner, as those are the ones we are > interested in. > For that reason, page_owner maintains its own list of stack_records, > because traversing that list is faster than traversing all buckets > while keeping at the same time a low complexity. > > For now, add to stack_list only the stack_records of dummy_handle and > failure_handle, and set their refcount of 1. > > Further patches will add code to increment or decrement stack_records > count on allocation and free operation. > > Signed-off-by: Oscar Salvador <osalvador@xxxxxxx> Reviewed-by: Vlastimil Babka <vbabka@xxxxxxx>
