From: Ximing Zhang <xzhangjr@gmail.com>
To: Hugo Sales <hugo@hsal.es>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
Viresh Kumar <viresh.kumar@linaro.org>,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
Len Brown <lenb@kernel.org>,
linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH RFT] cpufreq: intel_pstate: Refresh cpuinfo.max_freq when a CPU goes online
Date: Sun, 15 Nov 2026 12:52:26 +0400 [thread overview]
Message-ID: <20261115085234.40661-1-xzhangjr@gmail.com> (raw)
In-Reply-To: <20261114-intel-pstate-online-max-freq-v1-1-1bbdae2b4986@hsal.es>
On Sat, Nov 14, 2026, Hugo Sales wrote:
> I have no HWP machine, so the HWP capability path is untested
The patch fixed the stale cpuinfo_max_freq on my Core i7-10510U with
intel_pstate in active mode and HWP enabled.
The test changed no_turbo while CPU 7 was offline, then brought CPU 7
back online. These are policy7/cpuinfo_max_freq readings in kHz:
Turbo change Unpatched Patched
off to on 1800000 4900000
on to off 4900000 1800000
Both patched readings matched CPU 7's reference with all CPUs online.
CPU 0 stayed online and reported the expected maximum in both cases.
Tested-by: Ximing Zhang <xzhangjr@gmail.com>
Thanks,
Ximing
prev parent reply other threads:[~2026-11-15 8:53 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-14 11:51 Hugo Sales via B4 Relay
2026-11-15 8:52 ` Ximing Zhang [this message]
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