[uml-devel] Problem: copy_thread : pipe failed, err = 24

[uml-devel] Problem: copy_thread : pipe failed, err = 24

[Sebastian Wiesinger]

Hello,

I'm using a host system with 9 UML boxes and keep getting the error

copy_thread : pipe failed, err = 24

This error appears first after a few hours of running and the boxes
with this error is no longer reachable. The following other errors
also appear:

flush_thread : new thread failed, errno = 1
copy_thread : clone failed - errno = 11
copy_thread : clone failed - errno = 1
copy_thread : clone failed - errno = 1


I used the 2.4.24 UML Patch with a new 2.4.25 Kernel wich applied
without errors.

Any suggestions?

Sebastian


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Re: [uml-devel] Problem: copy_thread : pipe failed, err = 24

[BlaisorBlade]

Alle 10:26, venerdì 20 febbraio 2004, Sebastian Wiesinger ha scritto:
> Hello,
>
> I'm using a host system with 9 UML boxes and keep getting the error
>
> copy_thread : pipe failed, err = 24

This is EMFILE. Either you "ulimit"ed your UML's (and one UML needs a lot of 
filehandles) or you need to increase the filehandle limit where it is 
happening.

> This error appears first after a few hours of running and the boxes
> with this error is no longer reachable.

*Very* strange. If you mean that you can no longer login / do anything that 
needs to create a new process inside UML, I understand it. Otherwise, there 
is something strange. Please try to watch how many open files UML has (ls 
/proc/<Umlpid>/fd is your friend) and increase filehandles and process limits 
(read man proc and search about /proc/sys/kernel for this).

> The following other errors
> also appear:
>
> flush_thread : new thread failed, errno = 1
> copy_thread : clone failed - errno = 11
> copy_thread : clone failed - errno = 1
> copy_thread : clone failed - errno = 1

EPERM (very strange) and EAGAIN (too many processes running). Checking the 
source for sys_clone could be needed to diagnose EPERM (unless you have 
something as GrSecurity active).

-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729



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Re: [uml-devel] Problem: copy_thread : pipe failed, err = 24

[Sebastian Wiesinger]

* BlaisorBlade <blaisorblade_spam@yahoo.it> [2004-02-26 19:39]:
> > copy_thread : pipe failed, err = 24
> 
> This is EMFILE. Either you "ulimit"ed your UML's (and one UML needs a lot of 
> filehandles) or you need to increase the filehandle limit where it is 
> happening.

Yes, it was the ulimit, I increased the file handles now

> > This error appears first after a few hours of running and the boxes
> > with this error is no longer reachable.
> 
> *Very* strange. If you mean that you can no longer login / do anything that 
> needs to create a new process inside UML, I understand it.

Yes, that's the problem. :)


> > The following other errors
> > also appear:
> >
> > flush_thread : new thread failed, errno = 1
> > copy_thread : clone failed - errno = 11
> > copy_thread : clone failed - errno = 1
> > copy_thread : clone failed - errno = 1
> 
> EPERM (very strange) and EAGAIN (too many processes running). Checking the 
> source for sys_clone could be needed to diagnose EPERM (unless you have 
> something as GrSecurity active).

No, vanilla 2.4.25 Kernel.

Greetings, Sebastian


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