I won't have time to try the patch for the next three weeks or so, sorry. On Wed, Feb 12, 2020 at 3:55 PM Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> wrote: > > On Wed, Feb 12, 2020 at 02:45:39PM -0800, Ivan Babrou wrote: > > Here's a typical graph: https://imgur.com/a/n03x5yH > > > > * Green (numa0) and blue (numa1) for 4.19 > > * Yellow (numa0) and orange (numa1) for 5.4 > > > > These downward slopes on numa0 on 5.4 are somewhat typical to the > > worst case scenario. > > > > If I try to clean up data a bit from a bunch of machines, this is how > > numa0 compares to numa1 with 1h average values of free memory above > > 5GiB: > > > > * https://imgur.com/a/6T4rRzi > > > > I think it's safe to say that numa0 is much much worse, but I cannot > > be 100% sure that numa1 is free from adverse effects, they may be just > > hiding in the noise caused by rolling reboots. > > > > Ok, while I expected node 0 to be worse in general, a runaway boost due > to constant fragmentation would be a problem in general. In either case, > the patch should reduce the damage. Is there any chance that the patch > can be tested or would it be disruptive for you? > > -- > Mel Gorman > SUSE Labs
