Messages in this thread | | | From | "Rafael J. Wysocki" <> | Date | Mon, 21 Nov 2022 20:23:54 +0100 | Subject | Re: [PATCH v3 0/5] AMD Pstate driver Urgent Change |
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On Thu, Nov 17, 2022 at 8:36 AM Perry Yuan <Perry.Yuan@amd.com> wrote: > > The patchset changed amd-pstate driver as built-in type to resolve the > driver loading sequence problem, otherwise the acpi-cpufreq driver will > be loaded as the default cpufreq scaling driver instead of amd-pstate. > > Some new kernel parameters are added to allow user to disable pstate driver > and load driver with passive mode which use governors to do the > frequency scaling control. > > * `amd_pstate=disabled` or no parameters will not load pstate driver. > * `amd_pstate=passive` will load pstate driver with passive mode. > > Set the `amd_pstate` driver disabled by default because of performance > degradation on a number of AMD ASICs in the passive mode driver, > especially the shared memory support processors. > > EPP support for the amd_pstate driver is under review. With EPP support, > the said performance issue is resolved. Once that gets upstream, > the `active` mode amd_pstate_epp driver may be enabled by default. > > Changes from v2: > * pick up Acked-by flag of Huang Rui > * fix typo in the cover letter > > Changes from v1: > * fix commit info in v1 patch PATCH 4/5 > * pick up Reviewed-by flag of Gautham R. Shenoy > * pick up Tested-by flag of Wyes Karny > > v2: https://lore.kernel.org/lkml/20221117071910.3347052-1-Perry.Yuan@amd.com/ > v1: https://lore.kernel.org/lkml/20221117024955.3319484-1-Perry.Yuan@amd.com/ > > Perry Yuan (4): > cpufreq: amd-pstate: change amd-pstate driver to be built-in type > cpufreq: amd-pstate: add amd-pstate driver parameter for mode > selection > Documentation: amd-pstate: add driver working mode introduction > Documentation: add amd-pstate kernel command line options > > Wyes Karny (1): > cpufreq: amd-pstate: cpufreq: amd-pstate: reset MSR_AMD_PERF_CTL > register at init > > .../admin-guide/kernel-parameters.txt | 11 +++++ > Documentation/admin-guide/pm/amd-pstate.rst | 30 +++++------- > drivers/cpufreq/Kconfig.x86 | 2 +- > drivers/cpufreq/amd-pstate.c | 49 +++++++++++++------ > 4 files changed, 59 insertions(+), 33 deletions(-) > > --
I have applied this series as 6.1-rc7 material.
Please let me know if you'd rather want to defer it till 6.2-rc1.
Thanks!
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