[uml-devel] Question about the unexpected signal 11 when fork in UML-2.6.7 TT mode

[uml-devel] Question about the unexpected signal 11 when fork in UML-2.6.7 TT mode

[Alex LIU]

Hi,all:

When I fork() in UML TT mode,it always said "the sleeping process xxx received unexpedted signal 11" and the UML hang...before fork I also set the signal handler...
My UML is 2.6.7 and I used TT mode.Thanks a lot!

Alex




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Re: [uml-devel] Question about the unexpected signal 11 when fork in UML-2.6.7 TT mode

[Blaisorblade]

On Tuesday 21 June 2005 12:05, Alex LIU wrote:
> Hi,all:
>
> When I fork() in UML TT mode,it always said "the sleeping process xxx
> received unexpedted signal 11" and the UML hang...before fork I also set
> the signal handler... My UML is 2.6.7 and I used TT mode.Thanks a lot!

> Alex
Have you a good reason to use UML 2.6.7? We can't know by heart the list of 
all fixed bugs in previous UML releases, really, and you'll be doing yourself 
a favor by upgrading to 2.6.11-bs5 or 2.6.12 (which contains almost 
everything from -bs).

That said, you are talking about userspace code, right? It's anyway strange 
that your system boots but you can't write a simple code that fork()'s.
-- 
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894)
http://www.user-mode-linux.org/~blaisorblade

	

	
		
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RE: [uml-devel] Question about the unexpected signal 11 when fork in UML-2.6.7 TT mode

[Alex LIU]

I just let the SIGSEVG go and return from the sleeping_process_signal function instead of tracer_panic and hanging the UML.
It seems ok. Is it dangerous? Thanks a lot!

Alex

-----Original Message-----
From: Blaisorblade [mailto:blaisorblade@yahoo.it] 
Sent: Tuesday, June 21, 2005 11:42 PM
To: user-mode-linux-devel@lists.sourceforge.net
Cc: Alex LIU
Subject: Re: [uml-devel] Question about the unexpected signal 11 when fork in UML-2.6.7 TT mode


On Tuesday 21 June 2005 12:05, Alex LIU wrote:
> Hi,all:
>
> When I fork() in UML TT mode,it always said "the sleeping process xxx 
> received unexpedted signal 11" and the UML hang...before fork I also 
> set the signal handler... My UML is 2.6.7 and I used TT mode.Thanks a 
> lot!

> Alex
Have you a good reason to use UML 2.6.7? We can't know by heart the list of 
all fixed bugs in previous UML releases, really, and you'll be doing yourself 
a favor by upgrading to 2.6.11-bs5 or 2.6.12 (which contains almost 
everything from -bs).

That said, you are talking about userspace code, right? It's anyway strange 
that your system boots but you can't write a simple code that fork()'s.
-- 
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!". Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894) http://www.user-mode-linux.org/~blaisorblade

	

	
		
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Re: [uml-devel] Question about the unexpected signal 11 when fork in UML-2.6.7 TT mode

[Blaisorblade]

On Friday 24 June 2005 11:57, Alex LIU wrote:
> I just let the SIGSEVG go and return from the sleeping_process_signal
> function instead of tracer_panic and hanging the UML. It seems ok. Is it
> dangerous? Thanks a lot!
The sleeping process will get the SIGSEGV, with whatever content it has; 
hopefully it should handle it in kernel code but I'm not too sure about the 
situation. To ignore the signal you'll need a PTRACE_CONT (or PTRACE_SYSCALL, 
depending on the situation) with a 0 signal value.

However, is this related to the below problem? Did you try the other way 
around (i.e. upgrading) to solve it?
> Alex

> -----Original Message-----
> From: Blaisorblade [mailto:blaisorblade@yahoo.it]
> Sent: Tuesday, June 21, 2005 11:42 PM
> To: user-mode-linux-devel@lists.sourceforge.net
> Cc: Alex LIU
> Subject: Re: [uml-devel] Question about the unexpected signal 11 when fork
> in UML-2.6.7 TT mode
>
> On Tuesday 21 June 2005 12:05, Alex LIU wrote:
> > Hi,all:
> >
> > When I fork() in UML TT mode,it always said "the sleeping process xxx
> > received unexpedted signal 11" and the UML hang...before fork I also
> > set the signal handler... My UML is 2.6.7 and I used TT mode.Thanks a
> > lot!
> >
> > Alex
>
> Have you a good reason to use UML 2.6.7? We can't know by heart the list of
> all fixed bugs in previous UML releases, really, and you'll be doing
> yourself a favor by upgrading to 2.6.11-bs5 or 2.6.12 (which contains
> almost everything from -bs).
>
> That said, you are talking about userspace code, right? It's anyway strange
> that your system boots but you can't write a simple code that fork()'s.

-- 
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894)
http://www.user-mode-linux.org/~blaisorblade

	

	
		
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