On Mon, Jan 26, 2015 at 04:00:20PM -0800, David Rientjes wrote: > [...] > This is a result of allowing something external (process B) be able to > clear hwm so that you never knew the value went to 100MB. That's the > definition of a race, I don't know how to explain it any better and making > any connection between clearing PG_referenced and mm->hiwater_rss is a > stretch. This approach just makes mm->hiwater_rss meaningless. I understand your concern, but I hope you agree that the functionality we are proposing would be very useful for profiling. Therefore, I suggest adding an extra resettable field to /proc/pid/status (e.g. resettable_hiwater_rss) instead. What is your view on this approach? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>