On Tue, Feb 07, 2023 at 07:28:56AM -0700, Jens Axboe wrote: > Outside of that, we're now doubling the amount of memory associated with > tracking this. That isn't necessarily a showstopper, but it is not > ideal. I didn't take a look at the other conversions (again, because > they were not sent to me), but seems like the task_struct and flags > could just be passed in as they may very well be known to many/most > callers? For places doing the mm accounting type it cannot use the task struct as the underlying mm can be replaced and keep the task, IIRC. We just had a bug in VFIO related to this.. If we could go back from the mm to the task (even a from a destroyed mm though) that might work to reduce storage? Jason
