linux-kernel - Re: today's linux-next fails to boot

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Message-ID: <20080711190749.GB21758@elte.hu>
Date:	Fri, 11 Jul 2008 21:07:49 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Török Edwin <edwintorok@...il.com>,
	Takashi Iwai <tiwai@...e.de>, linux-next@...r.kernel.org,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Vegard Nossum <vegard.nossum@...il.com>
Subject: Re: today's linux-next fails to boot


* Rafael J. Wysocki <rjw@...k.pl> wrote:

> On Friday, 11 of July 2008, Ingo Molnar wrote:
> > 
> > * Török Edwin <edwintorok@...il.com> wrote:
> > 
> > > On 2008-07-11 16:59, Ingo Molnar wrote:
> > > > * Török Edwin <edwintorok@...il.com> wrote:
> > > >
> > > >   
> > > >>> [Added Ingo to Cc]
> > > >>>
> > > >>> I get the boot problem on i386 with 2008-07-11 linux-next tree, too.
> > > >>> In my case, no error appears on the screen, just staying blank and
> > > >>> dead.  It seems stopping at the very beginning, soon after GRUB, so
> > > >>> could be the same reason.
> > > >>>   
> > > >>>       
> > > >> I don't see any boot messages on the screen, I get that BUG message as
> > > >> soon as grub's menu dissapears.
> > > >> I have bisected it to this range so far:
> > > >> git-bisect good aa03060a78c1aec53075a0c8ca7be19cedfbea8f
> > > >> git-bisect bad b1611c0058bc6635e7257e755c3f194933a7a6df
> > > >>
> > > >> Should I continue to bisect?
> > > >>     
> > > >
> > > > could you check latest tip/master, does it boot fine with the same 
> > > > config?
> > > 
> > > tip/master boots fine.
> > 
> > to update linux-next to the latest bits in -tip, you can perhaps do 
> > something like this:
> > 
> >  git-merge tip/auto-x86-next
> >  git-merge tip/auto-core-next
> >  git-merge tip/auto-cpus4096-next
> >  git-merge tip/auto-ftrace-next
> >  git-merge tip/auto-generic-ipi-next
> >  git-merge tip/auto-genirq-next
> >  git-merge tip/auto-latest
> >  git-merge tip/auto-safe-poison-pointers-next
> >  git-merge tip/auto-sched-next
> >  git-merge tip/auto-stackprotector-next
> >  git-merge tip/auto-timers-next
> > 
> > but it's easily possible that the bug is in some other portion of 
> > linux-next.
> 
> Hm, I haven't tested the linux-next from today myself yet, but I have 
> a related question.  Namely, is there a way to get a log of commits 
> that have been added since the previous linux-next?
> 
> That may help to find a guilty patch if the yesterday's linux-next 
> works.

at least in -tip it works like this:

   git-shortlog tip-history-2008-07-10_09.58_Thu..

or, a more practical format with commit IDs on the same line:

  git log --no-merges --pretty=format:"%h: %s" \
      tip-history-2008-07-10_09.58_Thu..

you can restrict it to a given piece of code as well, say:

  git log --no-merges --pretty=format:"%h: %s" \
      tip-history-2008-07-10_09.58_Thu.. -- arch/x86/ include/asm-x86/

this doesnt work in linux-next nearly as well, due to the Quilt imported 
trees. Every time a quilt queue is updated and reimported, there's a 
stream of repeat commits.

	Ingo
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