On Thu, 15 Feb 2024 at 11:55, Vlastimil Babka <vbabka@xxxxxxx> wrote: > > 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> > +1 Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
