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 tElxiOeo 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He will submit the patch soon. Thanks in advance for your kind review. Regards, Tianyou On 3/11/2026 11:02 PM, Li, Tianyou wrote: > > On 3/9/2026 10:26 PM, David Hildenbrand (Arm) wrote: >> On 3/9/26 01:42, Li, Tianyou wrote: >>> Hi David, Mike & Other maintainers, >> Hi! >> >>> Just a quick update: Yuan and I created a new patch based on David and >>> Mike's code, updated the documentation as well, performed the >>> performance test, double check all the references etc. We observed a >>> slightly performance regression, not sure it was caused by the >>> environment configuration or we triggered some unexpected behavior. We >>> might need a bit more time to investigate. Will send out the patch soon >>> once we have confirmed data for the performance regression. Thanks. >> A performance regression would be rather unexpected, unless we somehow >> don't ever set zone->contiguous=true any more :) >> >> In which test / code path did you observe a regression? > > > Sorry for the late response, I missed the email by accident. The test > is simply hotplug and unplug the 256GB memory, the time became 3s > instead of 2s for some reason compared to previous patch. > Interestingly, for 512GB memory hotplug/unplug, the time remains as > 6s. What we planned to do are: 1. double/triple check with the same > and other servers; 2. collect the perf profile to see what is the diff > compared with previous patch, if the regression consistently persisted. > > I will work with Yuan on this and hopefully we can have more > information to be shared here soon. Thanks. > > > Regards, > > Tianyou >