linux-kernel - Re: 2.6.23-rc3-mm1

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Date:	Thu, 23 Aug 2007 12:39:36 +0100
From:	mel@...net.ie (Mel Gorman)
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, Sam Ravnborg <sam@...nborg.org>,
	Andi Kleen <ak@...e.de>
Subject: Re: 2.6.23-rc3-mm1

On (22/08/07 11:10), Andrew Morton didst pronounce:
> On Wed, 22 Aug 2007 18:17:38 +0100
> Mel Gorman <mel@....ul.ie> wrote:
> 
> > Andrew Morton wrote:
> > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc3/2.6.23-rc3-mm1/
> > > 
> > > - git-ixgbe.patch got dropped - git-net.patch destroyed it
> > > 
> > > - then git-net got dropped as it doesn't work
> > > 
> > > - the -mm import-to-git engine still isn't working
> > > 
> > 
> > >From elm3b6 on test.kernel.org, we get the following build error
> > 
> > 08/22/07-07:01:07 building kernel - make bzImage
> >   CHK     include/linux/version.h
> >   UPD     include/linux/version.h
> >   CHK     include/linux/utsrelease.h
> >   UPD     include/linux/utsrelease.h
> >   SYMLINK include/asm -> include/asm-x86_64
> >   CC      arch/x86_64/kernel/asm-offsets.s
> > arch/x86_64/kernel/asm-offsets.c:1: error: -mpreferred-stack-boundary=3
> > is not between 4 and 12
> > make[1]: *** [arch/x86_64/kernel/asm-offsets.s] Error 1
> > make: *** [prepare0] Error 2
> > 08/22/07-07:01:08 Build the kernel. Failed rc = 2
> > 08/22/07-07:01:08 build: Building kernel... Failed rc = 1
> > Failed and terminated the run
> > 08/22/07-07:01:08 command complete: (1) rc=126 (TEST ABORT)
> >  Fatal error, aborting autorun
> > 
> > config file at: http://test.kernel.org/abat/107411/build/dotconfig
> > gcc version is 3.4.4
> > 
> > This does not occur when using a cross-compiler gcc 3.4.0
> > 
> 
> x86_64-mm-less-stack-alignment.patch has
> 
> cflags-y += $(call cc-option,-mpreferred-stack-boundary=3)
> 
> So we _should_ have detected that gcc didn't like =3, so it
> should not have been used.
> 
> I am suspecting a kbuild glitch: asm-offsets.c tends to be handled
> in special ways (ie: it's usually the thing which blows up first)
> so perhaps it is somehow avoiding the above does-gcc-support-this test.
> 
> Suitable cc's added ;)

Reverting the patch does allow the kernel to build and boot on that
machine.

-- 
Mel Gorman
Part-time Phd Student                          Linux Technology Center
University of Limerick                         IBM Dublin Software Lab
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