On Sat, 13 Sep 2014 09:26:49 +0400 Konstantin Khlebnikov <koct9i@xxxxxxxxx> wrote: > > > > Did we really need to put the BalloonPages count into per-zone vmstat, > > global vmstat and /proc/meminfo? Seems a bit overkillish - why so > > important? > > Balloon grabs random pages, their distribution among numa nodes might > be important. > But I know nobody who uses numa-aware vm together with ballooning. > > Probably it's better to drop per-zone vmstat and line from meminfo, > global vmstat counter should be enough. Yes, the less we add the better - we can always add stuff later if there is a demonstrated need. > > > > Consuming another page flag is a big deal. We keep on nearly running > > out and one day we'll run out for real. page-flags-layout.h is > > incomprehensible. How many flags do we have left (worst-case) with this > > change? Is there no other way? Needs extraordinary justification, > > please. > > PageBalloon is not a page flags, it's like PageBuddy -- special state > of _mapcount (-256 in this case). > The same was in v1 and is written in the comment above. oop sorry, I got confused about KPF_BALLOON. -- 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>