On Wed, Mar 25, 2026 at 05:09:31PM +0800, Qiliang Yuan wrote: > The Linux kernel provides mechanisms like 'isolcpus' and 'nohz_full' to > reduce interference for latency-sensitive workloads. However, these are > locked behind the "Reboot Wall" - they can only be configured via boot > parameters and require a system restart for changes to take effect. > > In modern cloud-native environments, CPU resources often need to be > dynamically re-partitioned to accommodate container scaling without > the performance penalty and downtime of a full system reboot. Similarly, > high-frequency trading (HFT) platforms require the ability to fine-tune > CPU isolation at runtime to minimize jitter for critical execution threads > based on shifting market demands. > > This patch series introduces Dynamic Housekeeping & Enhanced Isolation > (DHEI). DHEI allows administrators to reconfigure the kernel's > housekeeping boundaries at runtime via a new sysfs interface at > /sys/kernel/housekeeping/.
I think I asked for this in the previous thread but please coordinate with existing cpuset and isolation mechanisms. You aren't even cc'ing Waiman for cpuset. Thanks. -- tejun
