Re: [PATCH 00/15] Implementation of Dynamic Housekeeping & Enhanced Isolation (DHEI)

Tejun Heo
2026-03-25T16:02:57Z

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