linux-kernel - Re: Status on CPU hotplug issues

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Message-ID: <20061008191350.GB3788@elf.ucw.cz>
Date:	Sun, 8 Oct 2006 21:13:50 +0200
From:	Pavel Machek <pavel@....cz>
To:	Bryce Harrington <bryce@...l.org>
Cc:	Andrew Morton <akpm@...l.org>, vatsa@...ibm.com, torvalds@...l.org,
	linux-kernel@...r.kernel.org, shaohua.li@...el.com,
	hotplug_sig@...l.org, lhcs-devel@...ts.sourceforge.net
Subject: Re: Status on CPU hotplug issues

Hi!

> > > > > How well tested is this?  From my reading, this will cause
> > > > > enable_nonboot_cpus() to panic.  Is that intended?
> > > > 
> > > > I wanted to give you an update on results of cpu testing I've done on
> > > > recent kernels and several architectures.  Since -rc1 is out, I wanted
> > > > to give added visibility to the few issues that remain.
> > > > 
> > > > The full results are available here:
> > > > 
> > > >     http://crucible.osdl.org/runs/hotplug_report.html
> > > > 
> > > > This is actually a report for cpu hotplug tests generated hourly,
> > > > however we run it against all of the kernel -git snapshots posted to
> > > > kernel.org.  Whereever you see a blank square, it indicates the kernel
> > > > either failed to build or boot.
> > 
> > So... patch-2.6.18-git4 failed to boot on all architectures? I'm
> > seeing very little green fields there... actually I only see two green
> > fields in whole table.
> 
> No, it failed to build due to a patching issue that has since been fixed
> (I can rerun those older runs if there is interest.)

Reruning few of them and deleting rest from table would be nice.

> > > iirc Pavel did some testing a month or two ago and was seeing userspace
> > > misbehaviour?
> > 
> > Pavel did some testing (like two threads trying to plug/unplug cpus at
> > the same time), and seen machines dying real fast; but that was fixed,
> > IIRC, and I did not really torture it after that.
> 
> If this test is available, I could include it in my test runs if you
> think it would be worth tracking.

Is shell script acceptable form of a test?
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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