linux-kernel - Re: Regression: patch " hvc_console: display printk messages on console." causing infinite loop with 3.2-rc0 + Xen.

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Message-Id: <20111102121309.4dbb0d2ac90d2879130820dd@canb.auug.org.au>
Date:	Wed, 2 Nov 2011 12:13:09 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Greg KH <gregkh@...e.de>
Cc:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>, miche@...gle.com,
	linux-kernel@...r.kernel.org, xen-devel@...ts.xensource.com,
	Anton Blanchard <anton@...ba.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	virtualization@...ts.linux-foundation.org,
	ppc-dev <linuxppc-dev@...ts.ozlabs.org>,
	Amit Shah <amit.shah@...hat.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Linus <torvalds@...ux-foundation.org>
Subject: Re: Regression: patch
 " hvc_console: display printk messages on console." causing infinite loop
 with 3.2-rc0 + Xen.

Hi Greg,

On Thu, 27 Oct 2011 07:48:06 +0200 Greg KH <gregkh@...e.de> wrote:
>
> On Thu, Oct 27, 2011 at 01:30:08AM -0400, Konrad Rzeszutek Wilk wrote:
> > Hey Miche.
> > 
> > The git commit 361162459f62dc0826b82c9690a741a940f457f0:
> > 
> >     hvc_console: display printk messages on console.
> > 
> > is causing an infinite loop when booting Linux under Xen, as so:
> 
> Ick, not good, thanks for letting us know.

Indeed. I am wondering why it was put in a tree and sent to Linus without
any Acks or even being replied to by anyone.  It appeared in the tty tree
between Oct 14 and Oct 25 (while I was unfortunately on vacation).  If
anyone had tried to boot this on any PowerPC server, it would have been
immediately obvious (as it was when I booted Linus' tree last night).

And the original author expressed doubts as to his understanding of how
it should all work anyway.

Just a little more care, please.

I would vote for reverting the original and having it resubmitted with
corrections at some later date.
-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au
http://www.canb.auug.org.au/~sfr/

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