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Date: Fri, 11 Dec 2020 01:28:51 +0100 From: Alexandre Belloni <alexandre.belloni@...tlin.com> To: Thomas Gleixner <tglx@...utronix.de> Cc: LKML <linux-kernel@...r.kernel.org>, Jason Gunthorpe <jgg@...pe.ca>, Miroslav Lichvar <mlichvar@...hat.com>, John Stultz <john.stultz@...aro.org>, Prarit Bhargava <prarit@...hat.com>, Alessandro Zummo <a.zummo@...ertech.it>, linux-rtc@...r.kernel.org, Peter Zijlstra <peterz@...radead.org> Subject: Re: [patch 4/8] rtc: core: Make the sync offset default more realistic On 11/12/2020 01:23:57+0100, Thomas Gleixner wrote: > Alexandre, > > On Fri, Dec 11 2020 at 00:59, Alexandre Belloni wrote: > > On 06/12/2020 22:46:17+0100, Thomas Gleixner wrote: > >> /* Drivers can revise this default after allocating the device. */ > >> - rtc->set_offset_nsec = NSEC_PER_SEC / 2; > >> + rtc->set_offset_nsec = 10 * NSEC_PER_MSEC; > > > > I did retest, on a slow 100kHz i2c bus, with a fairly inconvenient RTC, > > The maximum offset to set the RTC was 4845533ns so I'd say 10ms is too > > large. Should we make that 5ms ? > > Sure. As I said I pulled the 10 out of thin air. > > > Apart from that, on the series, you can add my > > Acked-by: Alexandre Belloni <alexandre.belloni@...tlin.com> > > I'll amend the s/10/5/ throughout the series while queueing the whole > pile in the timers/core branch unless you want it to be handled > differently. > That's fine for me. -- Alexandre Belloni, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
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