All of lore.kernel.org
 help / color / mirror / Atom feed
From: Thomas Gleixner <tglx@linutronix.de>
To: paulmck@kernel.org
Cc: linux-kernel@vger.kernel.org, john.stultz@linaro.org,
	kernel-team@fb.com, ak@linux.intel.com, rong.a.chen@intel.com,
	sboyd@kernel.org
Subject: Re: [GIT PULL clocksource] Clocksource watchdog commits for v5.15
Date: Thu, 12 Aug 2021 15:46:42 +0200	[thread overview]
Message-ID: <87czqiixml.ffs@tglx> (raw)
In-Reply-To: <20210812000133.GA402890@paulmck-ThinkPad-P17-Gen-1>

On Wed, Aug 11 2021 at 17:01, Paul E. McKenney wrote:
> This pull request contains a single change that prevents clocksource
> watchdog testing on systems with HZ < 100, thus preventing the integer
> underflow that can occur on leisurely HZed systems.  This has been
> posted to LKML:
>
> https://lore.kernel.org/lkml/20210721212755.GA2066078@paulmck-ThinkPad-P17-Gen-1/

So with HZ < 100 .mult overflows, but why not simply adjusting the
mult, shift value to be

      .mult	= TICK_NSEC,
      .shift	= 0,

which is effectively the same as

      .mult	= TICK_NSEC << 8,
      .shift	= 8,

Hmm?

Thanks,

        tglx

  reply	other threads:[~2021-08-12 13:46 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-12  0:01 [GIT PULL clocksource] Clocksource watchdog commits for v5.15 Paul E. McKenney
2021-08-12 13:46 ` Thomas Gleixner [this message]
2021-08-12 16:37   ` Paul E. McKenney
2021-08-12 17:11     ` Thomas Gleixner
2021-08-12 20:01       ` Paul E. McKenney

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=87czqiixml.ffs@tglx \
    --to=tglx@linutronix.de \
    --cc=ak@linux.intel.com \
    --cc=john.stultz@linaro.org \
    --cc=kernel-team@fb.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=paulmck@kernel.org \
    --cc=rong.a.chen@intel.com \
    --cc=sboyd@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.