Expedited memory reclaim from killed processes

Posted Apr 18, 2019 6:26 UTC (Thu) by thestinger (guest, #91827)
In reply to: Expedited memory reclaim from killed processes by farnz
Parent article: Expedited memory reclaim from killed processes

MAP_NORESERVE is a no-op with overcommit disabled or full overcommit enabled. It only has an impact on heuristic overcommit, by bypassing the immediate failure heuristic.

Expedited memory reclaim from killed processes

Posted Apr 18, 2019 7:26 UTC (Thu) by farnz (subscriber, #17727) [Link]

Ah - on other systems (Solaris, at least, and IRIX had the same functionality under a different name), which do not normally permit any overcommit, it allows you to specifically flag a memory range as "can overcommit". If application-controlled overcommit ever becomes a requirement on Linux, supporting the Solaris (and documented) semantics would be a necessary part.