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From: Greg KH <gregkh@linuxfoundation.org>
To: Hungyu Lin <dennylin0707@gmail.com>
Cc: jirislaby@kernel.org, linux-serial@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] tty: n_tty: convert the full VTIME interval to jiffies
Date: Thu, 29 Oct 2026 08:04:06 +0100	[thread overview]
Message-ID: <2026102930-underwire-manmade-8083@gregkh> (raw)
In-Reply-To: <CAGEkeHft5gqu1Kq0saC1O0hg+ZE9AEO1tOgeXmd-g10uk2obgQ@mail.gmail.com>

On Wed, Oct 28, 2026 at 11:38:28PM -0700, Hungyu Lin wrote:
> > What real system uses HZ=128 ?
> >
> > In other words, is this a real issue at all?
> 
> AT91RM9200, for example. arch/arm/Kconfig fixes HZ to 128 when
> CONFIG_SOC_AT91RM9200 is enabled.
> 
> OpenWrt also uses HZ=128 for its at91/sam9x target; see
> target/linux/at91/sam9x/config-6.18. It publishes images for
> SAM9X60-EK and AT91SAM9G20-EK, among other boards.

Ok, and has it ever reported problems with this rounding error?  This is
very old code, changing it needs to be done only if an issue is actually
noticed as it might be relied on, right?

thanks,

greg k-h

  reply	other threads:[~2026-10-29  7:04 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-29  0:20 [PATCH] tty: n_tty: convert the full VTIME interval to jiffies Hungyu Lin
2026-10-29  0:24 ` sashiko-bot
2026-10-29  6:23 ` Greg KH
2026-10-29  6:38   ` Hungyu Lin
2026-10-29  7:04     ` Greg KH [this message]
2026-10-29  7:52       ` Hungyu Lin
2026-10-29  8:09         ` Greg KH
2026-10-29  8:17           ` Hungyu Lin

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