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From: Bongani Hlope <bonganilinux@mweb.co.za>
To: Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: Shutdown and Reboot Regression 2.6.25-rc[78]
Date: Sat, 12 Apr 2008 09:04:11 +0200
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Cc: Andrew Morton <akpm@linux-foundation.org>,
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References: <200804112241.44626.bonganilinux@mweb.co.za> <200804112342.48830.bonganilinux@mweb.co.za> <alpine.LFD.1.00.0804111605390.3143@woody.linux-foundation.org>
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On Saturday 12 April 2008 01:12:37 Linus Torvalds wrote:
> On Fri, 11 Apr 2008, Bongani Hlope wrote:
> > After about 4 restarts and 4 reboots, 2.6.25-rc9 seems to work fine with
> > and without the revert. I'll do some more testing.  The assembly output
> > files for kernel/printk.c don't seem that different between rc9 and rc7.
> > I'll see what else I can test.
>
> Ok, I suspect it may be timing-dependent and slightly random.
>

Nope it happens all the time with rc7 and rc8.... 

> Sadly, that is absolutely the case where "git bisect" works the worst. The
> end result of bisection will basically be _totally_ random if even one of
> the "git bisect bad/good" choises were wrong - doing a binary search is
> a very efficient way to find the buggy commit, but it also means that a
> single wrong turn will efficiently find a commit that is somewhere totally
> different.
>

git revert 266c2e0abeca649fa6667a1a427ad1da507c6375 on rc8 makes rc8 work 
again.