From: Jan Beulich <jbeulich@suse.com>
To: Jason Andryuk <jandryuk@gmail.com>
Cc: xen-devel@lists.xenproject.org
Subject: Re: [PATCH 01/13] cpufreq: Allow restricting to internal governors only
Date: Wed, 26 May 2021 15:18:30 +0200 [thread overview]
Message-ID: <927b886a-9b0c-2162-763b-9c2147227b8c@suse.com> (raw)
In-Reply-To: <20210503192810.36084-2-jandryuk@gmail.com>
On 03.05.2021 21:27, Jason Andryuk wrote:
> For hwp, the standard governors are not usable, and only the internal
> one is applicable.
So you say "one" here but use plural in the subject. Which one is
it (going to be)?
> Add the cpufreq_governor_internal boolean to
> indicate when an internal governor, like hwp-internal, will be used.
> This is set during presmp_initcall, so that it can suppress governor
DYM s/is/will be/? Afaict this is going to happen later in the series.
Which is a good indication that such "hanging in the air" changes
aren't necessarily the best way of splitting a set of changes, ...
> --- a/xen/drivers/cpufreq/cpufreq.c
> +++ b/xen/drivers/cpufreq/cpufreq.c
> @@ -57,6 +57,7 @@ struct cpufreq_dom {
> };
> static LIST_HEAD_READ_MOSTLY(cpufreq_dom_list_head);
>
> +bool __read_mostly cpufreq_governor_internal;
... also supported by you introducing a non-static variable without
any consumer outside of this file (and without any producer at all).
> @@ -122,6 +123,9 @@ int __init cpufreq_register_governor(struct cpufreq_governor *governor)
> if (!governor)
> return -EINVAL;
>
> + if (cpufreq_governor_internal && strstr(governor->name, "internal") == NULL)
I wonder whether designating any governors ending in "-internal"
wouldn't be less prone for possible future ambiguities.
> --- a/xen/include/acpi/cpufreq/cpufreq.h
> +++ b/xen/include/acpi/cpufreq/cpufreq.h
> @@ -115,6 +115,7 @@ extern struct cpufreq_governor cpufreq_gov_dbs;
> extern struct cpufreq_governor cpufreq_gov_userspace;
> extern struct cpufreq_governor cpufreq_gov_performance;
> extern struct cpufreq_governor cpufreq_gov_powersave;
> +extern bool cpufreq_governor_internal;
Please separate from the governor declarations by a blank line.
Sorry, all quite nit-like remarks, but still ...
Jan
next prev parent reply other threads:[~2021-05-26 13:19 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-03 19:27 [PATCH 00/13] Intel Hardware P-States (HWP) support Jason Andryuk
2021-05-03 19:27 ` [PATCH 01/13] cpufreq: Allow restricting to internal governors only Jason Andryuk
2021-05-26 13:18 ` Jan Beulich [this message]
2021-05-26 14:12 ` Jason Andryuk
2021-05-26 15:09 ` Jan Beulich
2021-05-26 16:44 ` Jason Andryuk
2021-05-03 19:27 ` [PATCH 02/13] cpufreq: Add perf_freq to cpuinfo Jason Andryuk
2021-05-26 13:24 ` Jan Beulich
2021-05-26 14:19 ` Jason Andryuk
2021-05-03 19:28 ` [PATCH 03/13] cpufreq: Export intel_feature_detect Jason Andryuk
2021-05-26 13:27 ` Jan Beulich
2021-05-26 14:44 ` Jason Andryuk
2021-05-26 15:11 ` Jan Beulich
2021-05-03 19:28 ` [PATCH 04/13] cpufreq: Add Hardware P-State (HWP) driver Jason Andryuk
2021-05-26 14:59 ` Jan Beulich
2021-05-27 7:23 ` Jan Beulich
2021-05-27 18:50 ` Jason Andryuk
2021-05-28 6:35 ` Jan Beulich
2021-06-03 11:55 ` Jason Andryuk
2021-06-04 6:39 ` Jan Beulich
2021-05-27 7:45 ` Jan Beulich
2021-05-03 19:28 ` [PATCH 05/13] xenpm: Change get-cpufreq-para output for internal Jason Andryuk
2021-05-26 15:21 ` Jan Beulich
2021-05-27 5:54 ` Jan Beulich
2021-05-03 19:28 ` [PATCH 06/13] cpufreq: Export HWP parameters to userspace Jason Andryuk
2021-05-27 7:55 ` Jan Beulich
2021-05-28 13:19 ` Jason Andryuk
2021-05-28 13:39 ` Jan Beulich
2021-05-03 19:28 ` [PATCH 07/13] libxc: Include hwp_para in definitions Jason Andryuk
2021-05-03 19:28 ` [PATCH 08/13] xenpm: Print HWP parameters Jason Andryuk
2021-05-27 8:02 ` Jan Beulich
2021-05-03 19:28 ` [PATCH 09/13] xen: Add SET_CPUFREQ_HWP xen_sysctl_pm_op Jason Andryuk
2021-05-27 8:33 ` Jan Beulich
2021-05-03 19:28 ` [PATCH 10/13] libxc: Add xc_set_cpufreq_hwp Jason Andryuk
2021-05-04 8:03 ` Jan Beulich
2021-05-04 11:31 ` Jason Andryuk
2021-05-27 9:45 ` Jan Beulich
2021-05-03 19:28 ` [PATCH 11/13] xenpm: Factor out a non-fatal cpuid_parse variant Jason Andryuk
2021-05-27 8:41 ` Jan Beulich
2021-05-03 19:28 ` [PATCH 12/13] xenpm: Add set-cpufreq-hwp subcommand Jason Andryuk
2021-05-27 9:46 ` Jan Beulich
2021-05-03 19:28 ` [PATCH 13/13] CHANGELOG: Add Intel HWP entry Jason Andryuk
2021-05-27 9:48 ` Jan Beulich
2021-05-20 14:57 ` [PATCH 00/13] Intel Hardware P-States (HWP) support Jan Beulich
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