[Sorry for a late reply I was on vacation last week] On Fri 10-02-17 09:50:15, Shaohua Li wrote: > On Fri, Feb 10, 2017 at 02:27:27PM +0100, Michal Hocko wrote: > > On Fri 03-02-17 15:33:21, Shaohua Li wrote: > > > Show MADV_FREE pages info in proc/sysfs files. > > > > How are we going to use this information? Why it isn't sufficient to > > watch for lazyfree events? I mean this adds quite some code and it is > > not clear (at least from the changelog) we we need this information. > > It's just like any other meminfo we added to let user know what happens in the > system. Users can use the info for monitoring/diagnosing. the > lazyfree/lazyfreed events can't reflect the lazyfree page info because > 'lazyfree - lazyfreed' doesn't equal current lazyfree pages and the events > aren't per-node. I'll add more description in the changelog. Well, I would prefer to not add new counters until there is a strong reason for them. Maybe a trace point would be more appropriate for debugging purposes. -- Michal Hocko SUSE Labs -- 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>
