linux-kernel - Re: Experiencing freezes with kernel 4.16.3 on a desktop with E5500 CPU (bisect included)

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Message-ID: <2120072.1825pzNyX4@aspire.rjw.lan>
Date:   Mon, 23 Apr 2018 11:27:36 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Diego Viola <diego.viola@...il.com>, linux-kernel@...r.kernel.org,
        tglx@...utronix.de, len.brown@...el.com, rui.zhang@...el.com,
        linux-pm@...r.kernel.org
Subject: Re: Experiencing freezes with kernel 4.16.3 on a desktop with E5500 CPU (bisect included)

On Monday, April 23, 2018 11:16:33 AM CEST Peter Zijlstra wrote:
> On Sat, Apr 21, 2018 at 11:19:55PM -0300, Diego Viola wrote:
> 
> > The problem only happens *after* resuming from suspend, in normal S0
> > state it never happens.
> 
> What kind of suspend are you doing? s2disk, s2ram ?
> 
> > My machine is a desktop and has a dual core E5500 CPU with 2GB of RAM,
> > I run Arch Linux and I use the i3wm.
> 
> That's a Core2 era chip; does it actually have stable TSC ?
> 
> > aa83c45762a242acce9b35020363225a7b59d7c9 is the first bad commit
> 
> That is most curious; that was supposed to only affect early boot. I'll
> try and figure out of there's some intersection with suspend.

Well, FWIW, I wonder if the flags that were set in init_tsc_clocksource() for
unstable TSC before the above commit may be involved in this somehow.