On Tue, Dec 17, 2013 at 04:07:35PM +0100, Zlatko Calusic wrote: > On 13.12.2013 15:10, Mel Gorman wrote: > >Kicked this another bit today. It's still a bit half-baked but it restores > >the historical performance and leaves the door open at the end for playing > >nice with distributing file pages between nodes. Finishing this series > >depends on whether we are going to make the remote node behaviour of the > >fair zone allocation policy configurable or redefine MPOL_LOCAL. I'm in > >favour of the configurable option because the default can be redefined and > >tested while giving users a "compat" mode if we discover the new default > >behaviour sucks for some workload. > > > > I'll start a 5-day test of this patchset in a few hours, unless you > can send an updated one in the meantime. I intend to test it on a > rather boring 4GB x86_64 machine that before Johannes' work had lots > of trouble balancing zones. Would you recommend to use the default > settings, i.e. don't mess with tunables at this point? >
For me at least I would prefer you tested v3 of the series with the default settings of not interleaving file-backed pages on remote nodes by default. Johannes might request testing with that knob enabled if the machine is NUMA although I doubt it is with 4G of RAM. Thanks. -- Mel Gorman SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
