# Re: \[PATCH v13 10/13\] virt: Introduce steal governor driver

- From: sashiko-bot@kernel.org
- Date: 2026-09-09 14:09:45 
- List: virtualization
- Page: https://ratatoskr.run/virtualization/2026/09/17539492
- Thread: https://ratatoskr.run/virtualization/2026/09/17538960/t.md

```text
> Introduce a new driver in virt named steal_governor. This driver
> will compute the steal time and drive the policy decisions regarding the
> preferred CPU state.
> 
> Note that this driver is strictly intended for actual guests. Hence
> block it on Xen dom0.
> More details can be found in Documentation/driver-api/steal-governor.rst.
> 
> A new kconfig called STEAL_GOVERNOR is introduced in subsequent patches,
> which enables this driver. This driver will select CONFIG_PREFERRED_CPU.
> This makes configs driven by user preference/configuration.
> When the driver is disabled, preferred CPUs remain the same as active CPUs.
> 
> The file layout of the driver is kept simple for now. The code is in
> drivers/virt/steal_governor.c, and the configs are part of
> drivers/virt/Kconfig.
> 
> The main structure of the steal governor contains:
> - work, delay: Deferred periodic work function variables.
> - steal, time: Used to calculate deltas during periodic work.
> - interval_ms, high_threshold, low_threshold: Tuning knobs for the
>   steal governor.
> 
> While there, add MAINTAINERS entry for this new driver.
> 
> Suggested-by: Yury Norov <yury.norov@gmail.com>
> Suggested-by: K Prateek Nayak <kprateek.nayak@amd.com>
> Signed-off-by: Shrikanth Hegde <sshegde@linux.ibm.com>

Sashiko has reviewed this patch and found no issues. It looks great!

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260909135617.871006-1-sshegde@linux.ibm.com?part=10

```