Steven Rostedt wrote at 18:11:36
> Could you apply these patches:
> 
> 2092e6be WARN_ON_SMP(): Allow use in if() statements on UP
> 29096202 futex: Fix WARN_ON() test for UP
> 
> On top of this commit, and see if the problem goes away. What could have
> happened, is that you have two bugs, with one of them fixed. If the git
> bisect stumbled on this bug, it will show this one, even though later
> on, this code was fixed. If you apply the above two patches and it works
> again, then this isn't the bug you are looking for.

I bisected it again and applied at every step those 2 commits, if commit 
2e12978 was in the source too.

Furthermore it was necessary to use a fresh instance of firefox every time to 
reproduce a now shomehow changed issue: the UML system wasn't longer 
reachable, neither ping nor ssh into it was possible as soon as I tried to 
point firefox to https://n22_uml/phpmyadmin/ and no crash occured any longer. 
Furthermore a previously opened ssh session to that UML hangs completely.


Bisecting gave :


git bisect badd123375425d7df4b6081a631fc1203fceafa59b2 is the first bad commit
commit d123375425d7df4b6081a631fc1203fceafa59b2
Author: Thomas Gleixner <t...@linutronix.de>
Date:   Wed Jan 26 21:32:01 2011 +0100

    rwsem: Remove redundant asmregparm annotation
    
    Peter Zijlstra pointed out, that the only user of asmregparm (x86) is
    compiling the kernel already with -mregparm=3. So the annotation of
    the rwsem functions is redundant. Remove it.
    
    Signed-off-by: Thomas Gleixner <t...@linutronix.de>
    Cc: Peter Zijlstra <pet...@infradead.org>
    Cc: David Howells <dhowe...@redhat.com>
    Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org>
    Cc: Matt Turner <matts...@gmail.com>
    Cc: Tony Luck <tony.l...@intel.com>
    Cc: Heiko Carstens <heiko.carst...@de.ibm.com>
    Cc: Paul Mundt <let...@linux-sh.org>
    Cc: David Miller <da...@davemloft.net>
    Cc: Chris Zankel <ch...@zankel.net>
    LKML-Reference: 
<alpine.LFD.2.00.1101262130450.31804@localhost6.localdomain6>
    Signed-off-by: Thomas Gleixner <t...@linutronix.de>

:040000 040000 f373822625e4f5d03d89997cc9f06ef0e21c6d08 
272479d3450a4924f3ad2d06a058d77c577ec0d4 M      include
:040000 040000 9294321acb9db51e4db72b8e7c95fbd1531a7f26 
393fc63299ae482792439384485618a492619787 M      lib

/enjoy
:-)

-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

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