From: Ralf Baechle <ralf@linux-mips.org>
To: Huacai Chen <chenhc@lemote.com>
Cc: John Crispin <john@phrozen.org>,
"Steven J. Hill" <Steven.Hill@imgtec.com>,
Linux MIPS Mailing List <linux-mips@linux-mips.org>,
linux-pm@vger.kernel.org, Fuxin Zhang <zhangfx@lemote.com>,
Zhangjin Wu <wuzhangjin@gmail.com>,
Hongliang Tao <taohl@lemote.com>
Subject: Re: [PATCH V2 12/12] MIPS: Loongson: Make CPUFreq usable for Loongson-3
Date: Tue, 11 Nov 2014 12:07:02 +0100 [thread overview]
Message-ID: <20141111110702.GA28822@linux-mips.org> (raw)
In-Reply-To: <CAAhV-H7H+7TYyvbecaS6C1NEq7DEnjez2Z_eHnpix0+m_5FDoA@mail.gmail.com>
On Tue, Nov 11, 2014 at 07:02:48PM +0800, Huacai Chen wrote:
> Loops_per_jiffy is set on startup and doesn't change later. It reflect
> the maximum value frequency, but for CPU hotplug, a new online CPU may
> not run at the maximum frequency (remain the old value before it is
> offline).
As suspected. But what if a CPU is hotunplugged, then the clockrate
for all the CPUs changes and then the gets re-hotplugged into the system.
Wouldn't in that case the udelay_val be used?
Ralf
next prev parent reply other threads:[~2014-11-11 11:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-04 6:18 [PATCH V2 12/12] MIPS: Loongson: Make CPUFreq usable for Loongson-3 Huacai Chen
2014-11-11 10:57 ` Ralf Baechle
2014-11-11 11:02 ` Huacai Chen
2014-11-11 11:07 ` Ralf Baechle [this message]
2014-11-11 11:25 ` Huacai Chen
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