2020-04-16 05:50:22

by Giovanni Gherdovich

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Subject: [PATCH 0/4] Frequency invariance fixes for x86

Patches 1-3 address bugs in the current frequency invariance support for x86,
including the incompatibility with cpu0 hotplug reported by Chris Wilson at
https://lore.kernel.org/lkml/[email protected]/
and the issue with CPUs that have less than 4 cores pointed out earlier
today by Like Xu at
https://lore.kernel.org/lkml/[email protected]/

Patch 4 is a minor code reorganization.

Giovanni Gherdovich (3):
x86, sched: Bail out of frequency invariance if base frequency is
unknown
x86, sched: Account for CPUs with less than 4 cores in freq.
invariance
x86, sched: Move check for CPU type to caller function

Peter Zijlstra (Intel) (1):
x86, sched: Don't enable static key when starting secondary CPUs

arch/x86/kernel/smpboot.c | 47 +++++++++++++++++++++++++++++++++--------------
1 file changed, 33 insertions(+), 14 deletions(-)

--
2.16.4


2020-04-16 07:23:22

by Peter Zijlstra

[permalink] [raw]
Subject: Re: [PATCH 0/4] Frequency invariance fixes for x86

On Thu, Apr 16, 2020 at 07:47:41AM +0200, Giovanni Gherdovich wrote:
> Patches 1-3 address bugs in the current frequency invariance support for x86,
> including the incompatibility with cpu0 hotplug reported by Chris Wilson at
> https://lore.kernel.org/lkml/[email protected]/
> and the issue with CPUs that have less than 4 cores pointed out earlier
> today by Like Xu at
> https://lore.kernel.org/lkml/[email protected]/
>
> Patch 4 is a minor code reorganization.
>
> Giovanni Gherdovich (3):
> x86, sched: Bail out of frequency invariance if base frequency is
> unknown
> x86, sched: Account for CPUs with less than 4 cores in freq.
> invariance
> x86, sched: Move check for CPU type to caller function
>
> Peter Zijlstra (Intel) (1):
> x86, sched: Don't enable static key when starting secondary CPUs
>
> arch/x86/kernel/smpboot.c | 47 +++++++++++++++++++++++++++++++++--------------
> 1 file changed, 33 insertions(+), 14 deletions(-)

Thanks!