linux-kernel - Re: [1/3] 2.6.21-rc7: known regressions (v2)

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Message-ID: <20070425012153.GT3468@stusta.de>
Date:	Wed, 25 Apr 2007 03:21:53 +0200
From:	Adrian Bunk <bunk@...sta.de>
To:	Greg KH <greg@...ah.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Wolfgang Erig <Wolfgang.Erig@....de>,
	linux-usb-devel@...ts.sourceforge.net,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: [1/3] 2.6.21-rc7: known regressions (v2)

On Tue, Apr 24, 2007 at 05:51:11PM -0700, Greg KH wrote:
> On Wed, Apr 25, 2007 at 02:29:58AM +0200, Adrian Bunk wrote:
> > On Tue, Apr 24, 2007 at 05:14:28PM -0700, Greg KH wrote:
> > > On Tue, Apr 24, 2007 at 11:32:53AM +0200, Wolfgang Erig wrote:
> > > > On Mon, Apr 23, 2007 at 03:18:19PM -0700, Greg KH wrote:
> > > > > On Mon, Apr 23, 2007 at 11:48:47PM +0200, Adrian Bunk wrote:
> > > > > > This email lists some known regressions in Linus' tree compared to 2.6.20.
> > > > > > 
> > > > > > If you find your name in the Cc header, you are either submitter of one
> > > > > > of the bugs, maintainer of an affectected subsystem or driver, a patch
> > > > > > of you caused a breakage or I'm considering you in any other way
> > > > > > possibly involved with one or more of these issues.
> > > > > > 
> > > > > > Due to the huge amount of recipients, please trim the Cc when answering.
> > > > > > 
> > > > > > 
> > > > > > Subject    : gammu no longer works
> > > > > > References : http://lkml.org/lkml/2007/4/20/84
> > > > > > Submitter  : Wolfgang Erig <Wolfgang.Erig@....de>
> > > > > > Status     : unknown
> > > > > 
> > > > > I've asked for more information about this, and so far am not sure it's
> > > > > a real problem.
> > > > 
> > > > It is a real problem for me.
> > > > I tried this on 2 different boxes with the same behaviour.
> > > > No sync between my Nokia mobile and Linux with the latest kernel :(
> > > 
> > > Sorry, I didn't see your response, have followed up on lkml now.
> > 
> > It turned out this was actually a bug in Gammu that will be fixed in 
> > the next release of Gammu.
> 
> Ah, ok, thanks for letting me know.
> 
> But how was the kernel version change triggering it?

I don't know, perhaps a side effect of Eric's work in kernel/signal.c?

The bug in Gammu was:
- Gammu wrongly set FASYNC in a fcntl() call.
- The unhandled SIGIO terminated Gammu in 2.6.21-rc.

Gammu being terminated by the SIGIO seems to be expected and documented 
behavior, and the surprising thing is that it wasn't terminated with 
earlier kernels.

> greg k-h

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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