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From: "Serge Noiraud" <serge.noiraud@bull.net>
To: Ingo Molnar <mingo@elte.hu>
Subject: Re: PREEMPT_RT : 2.6.16-rt12 and boot : BUG ?
Date: Mon, 10 Apr 2006 14:46:13 +0200
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jeudi 6 Avril 2006 17:05, Serge Noiraud wrote/a écrit :
> jeudi 6 Avril 2006 16:31, Ingo Molnar wrote/a écrit :
> > 
> > * Serge Noiraud <serge.noiraud@bull.net> wrote:
> > 
> > > input: ImPS/2 Generic Wheel Mouse as /class/input/input1
> > > VFS: Mounted root (ext2 filesystem).
> > > Fusion MPT base driver 3.03.07
> > > Copyright (c) 1999-2005 LSI Logic Corporation
> > > Could not allocate 8 bytes percpu data
> > > mptscsih: Unknown symbol scsi_remove_host
> > 
> > could you increase (double) PERCPU_ENOUGH_ROOM in 
> > include/linux/percpu.h, does that solve this problem? (and make sure you 
> > use -rt13, -rt12 had a couple of bugs)
> Tested with rt12 and 192K : same problem
> Tested with rt12 and 256K : same problem.
> Tested with rt13 and 256K : same problem.
> I'm currently compiling with CONFIG_KALLSYMS_ALL not set.
Same thing.

The boot succeed if I set CONFIG_CRITICAL_IRQSOFF_TIMING to no.
If I set this parameter to yes, I get the scsi unresolved symbols.
PERCPU_ENOUGH_ROOM  is actually set to 256K.
I'll try to set the original value.

I don't see the relation between this parameter and the missing scsi symbols resolution.
Timing problem ?

> > 
> > 	Ingo

-- 
Serge Noiraud