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Re: [BUG] 2.6.25-rc3 hangs in early boot on Sun Ultra5

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To: David Miller <davem@...>
Cc: <mikpe@...>, <sparclinux@...>, <linux-kernel@...>
Date: Wednesday, February 27, 2008 - 4:27 am

David Miller writes:
 > From: Mikael Pettersson <mikpe@it.uu.se>
 > Date: Tue, 26 Feb 2008 09:55:50 +0100
 > 
 > > Minor update: rc2-git7 has the slow initial console behaviour,
 > > but successfully switches to the framebuffer. rc2-git8 however
 > > hangs in the console handover. So I'll bisect git7->git8 next.
 > 
 > Between the VT layer registering it's console and the atyfb
 > driver initializing we get a crash, and it happens on all
 > sparc64 systems.  It is caused by this commit and I am working
 > on a fix:
 > 
 > commit a0c1e9073ef7428a14309cba010633a6cd6719ea
 > Author: Thomas Gleixner <tglx@linutronix.de>
 > Date:   Sat Feb 23 15:23:57 2008 -0800
 > 
 >     futex: runtime enable pi and robust functionality

My git7->git8 bisection yesterday independently also arrived
at that specific commit as being the culprit.

Bracketing the offending cmpxchg_futex_value_locked(NULL, 0, 0)
call with #if 0 .. #endif was enough to make my kernel boot.

I'll try your do_kernel_fault() patch later today.

/Mikael
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Messages in current thread:
[BUG] 2.6.25-rc3 hangs in early boot on Sun Ultra5, Mikael Pettersson, (Mon Feb 25, 4:41 pm)
Re: [BUG] 2.6.25-rc3 hangs in early boot on Sun Ultra5, David Miller, (Tue Feb 26, 4:46 pm)
Re: [BUG] 2.6.25-rc3 hangs in early boot on Sun Ultra5, Mikael Pettersson, (Tue Feb 26, 4:55 am)
Re: [BUG] 2.6.25-rc3 hangs in early boot on Sun Ultra5, David Miller, (Tue Feb 26, 8:49 pm)
Re: [BUG] 2.6.25-rc3 hangs in early boot on Sun Ultra5, Mikael Pettersson, (Wed Feb 27, 4:27 am)
Re: [BUG] 2.6.25-rc3 hangs in early boot on Sun Ultra5, David Miller, (Tue Feb 26, 9:06 pm)
Re: [BUG] 2.6.25-rc3 hangs in early boot on Sun Ultra5, Mikael Pettersson, (Wed Feb 27, 3:16 pm)
Re: [BUG] 2.6.25-rc3 hangs in early boot on Sun Ultra5, David Miller, (Wed Feb 27, 3:37 pm)
Re: [BUG] 2.6.25-rc3 hangs in early boot on Sun Ultra5, Thomas Gleixner, (Wed Feb 27, 4:02 am)
Re: [BUG] 2.6.25-rc3 hangs in early boot on Sun Ultra5, David Miller, (Wed Feb 27, 3:05 pm)
Re: [BUG] 2.6.25-rc3 hangs in early boot on Sun Ultra5, Thomas Gleixner, (Wed Feb 27, 3:55 pm)
Re: [BUG] 2.6.25-rc3 hangs in early boot on Sun Ultra5, David Miller, (Tue Feb 26, 5:32 pm)
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