linux-kernel - Re: PREEMPT_RT_FULL on x86-32 machine

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Message-ID: <20190628125120.GB21311@amd>
Date:   Fri, 28 Jun 2019 14:51:20 +0200
From:   Pavel Machek <pavel@....cz>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     Jan Kiszka <jan.kiszka@...mens.com>,
        linux-rt-users@...r.kernel.org,
        kernel list <linux-kernel@...r.kernel.org>, mwhitehe@...hat.com
Subject: Re: PREEMPT_RT_FULL on x86-32 machine

Hi!

> > > >Is full preemption supposed to work on x86-32 machines?
> > > >
> > > >Because it does not work for me. It crashes early in boot, no messages
> > > >make it to console. Similar configuration for x86-64 boots ok.
> > > >
> > > 
> > > Maybe you can also tell which version(s) you tried, and in which
> > > configuration(s), and how the crash looked like.
> > 
> > I wanted to know if the configuration is supposed to work at all
> > before starting heavy debugging. From your reply I assume that it
> > should work.
> > 
> > I tried 4.19.13-rt1-cip1 among others. Crash is early in boot, I can
> > try some early printing...
> 
> The latest is v4.19.50-rt22 I would suggest that one. There was a bug
> which was fixed either in 4.19.23-rt14 or in the following version.
> 
> If the latest one does not work please let me know and I will have a
> look.

Ok, let me try again. It seems the kernel based on the latest one
works ok. Even suspend/resume works.

Thanks,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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