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From: Joel Fernandes <joel@joelfernandes.org>
To: Z qiang <qiang.zhang1211@gmail.com>
Cc: paulmck@kernel.org, rcu@vger.kernel.org,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: rcutorture: Can not Disable RT throttling
Date: Fri, 25 Aug 2023 02:50:18 +0000	[thread overview]
Message-ID: <20230825025018.GE4008060@google.com> (raw)
In-Reply-To: <CALm+0cUrwYAQ=frj+S=N8s8Q4KYV6JWoU0+2E-NvaqEoFcMC7g@mail.gmail.com>

On Thu, Aug 24, 2023 at 10:30:37AM +0800, Z qiang wrote:
[..]
> > That would be difficult in built-in rcutorture testing due to the fact
> > that there is not much in the way of userspace.  I suppose we could
> > invoke the sysfs handler so as to mock up a userspace access, but that
> > might not be the most robust approach.

Yes.

> Does it mean to use filp_open() to open sched_rt_runtime_us file and
> write -1 through kernel_write() ?

I am afraid so but that might become hard to maintain in the long run. I
prefer exporting the necessary functions from RT to the kernel and just
calling those.

thanks,

 - Joel


      reply	other threads:[~2023-08-25  2:51 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-08-22  7:36 rcutorture: Can not Disable RT throttling Z qiang
2023-08-23 13:50 ` Joel Fernandes
2023-08-23 20:57   ` Paul E. McKenney
2023-08-24  2:30     ` Z qiang
2023-08-25  2:50       ` Joel Fernandes [this message]

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