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
