linux-kernel - Re: [PATCH] clocksource: riscv_timer: Provide sched

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Message-ID: <63f67f2b-9e17-78e6-beb5-65d32ff2f85c@linaro.org>
Date:   Mon, 3 Dec 2018 15:53:11 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Anup Patel <anup@...infault.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Palmer Dabbelt <palmer@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Atish Patra <atish.patra@....com>,
        Christoph Hellwig <hch@...radead.org>,
        linux-riscv@...ts.infradead.org,
        "linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] clocksource: riscv_timer: Provide sched_clock

On 03/12/2018 15:50, Anup Patel wrote:
> On Mon, Dec 3, 2018 at 6:29 PM Daniel Lezcano <daniel.lezcano@...aro.org> wrote:
>>
>> On 03/12/2018 13:35, Anup Patel wrote:
>>> Currently, we don't have a sched_clock registered for RISC-V systems.
>>> This means Linux time keeping will use jiffies (running at HZ) as the
>>> default sched_clock.
>>>
>>> To avoid this, we explicity provide sched_clock using RISC-V rdtime
>>> instruction (similar to riscv_timer clocksource).
>>>
>>> Signed-off-by: Anup Patel <anup@...infault.org>
>>
>> Hi Anup,
>>
>> the GENERIC_SCHED_CLOCK dependency in the Kconfig is missing.
> 
> Sure, will do.
> 
> I also have another patch to select GENERIC_SCHED_CLOCK
> for CONFIG_RISCV. Should I squash that patch with this patch??

I prefer the riscv config option to be merged via the riscv tree.


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