On Fri, Aug 1, 2025 at 9:27 PM Frank van der Linden <fvdl@xxxxxxxxxx> wrote: > Another idea is to minimize the time that a migration PTE is in place > for an mlocked page, Hugh (cc-ed) mentioned this in an offline > discussion. E.g. skip any mlocked pages in the first pass, and just > add them to a list. Then, do that list separately, but do them one by > one. There is somewhat similar logic in migrate_pages_sync for pages > that might need extra work / locking. Another idea might be, that the blocked task migrates the page it is blocked on by itself, removes the migration PTE and continues? Doing the work itself instead of waiting for another thread to do the work. Would that be possible? This would solve the priority inversion problem and should be way more deterministic than the current situation. Alexander KUKA Deutschland GmbH Board of Directors: Michael Jürgens (Chairman), Dirk Busch, Johan Naten, Hui Zhang Registered Office: Augsburg HRB 14914 This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorized copying, disclosure or distribution of contents of this e-mail is strictly forbidden. Please consider the environment before printing this e-mail.
