[PATCH v3 0/6] 32bit ARM branch predictor hardening

Nishanth Menon nm at ti.com
Mon Jan 29 06:58:45 PST 2018


On Mon, Jan 29, 2018 at 5:36 AM, Hanjun Guo <guohanjun at huawei.com> wrote:
[...]

> By the way, this patch set just enable branch predictor hardening
> on arm32 unconditionally, but some of machines (such as wireless
> network base station) will not be exposed to user to take advantage
> of variant 2, and those machines will be pretty sensitive for
> performance, so can we introduce Kconfig or boot option to disable
> branch predictor hardening as an option?

I am curious: Have you seen performance degradation with this series?
If yes, is it possible to share the information?

---
Regards,
Nishanth Menon



More information about the linux-arm-kernel mailing list