Re: %openmosix and sata

Dear Felipe,
I know that there are some bugs in my kernel patch :-(
but I'm not an expertise of kernel hacking... so I don't know how degub
linux kernel and find where is the bug! :-(
Months ago, I wrote on the mailing-list... saying that I've prepared
this patch and I asked to community to help me in debugging and
stabilizing my patch for 2.4.31 kernel...
... but I didn't get any help :-( :-(
Seems that people using openmosix are not expertise of kernel
debugging... and obviously the main developers don't spent time for
debugging 2.4.x series :-(
However, my cluster based on my patch runs from several months without
stops!! :-) :-)
For avoid the bug... don't run the mosrun command with the flag for
migrate the job.
For example, if you launch the command:
 mosrun -4 heavyJob
from a node different to 4... then you'll see the Segmentation Fault :-(
So... if you never use that command... all things go well ;-) ... in
fact, the automatic migration works well.

Ciao,
Gianluca

Felipe ha scritto:
> Thanks
>
> I try with it and the sata disk is ok, but when i probe the om with the
> next script:
>
>   for i in 1 2 3 4 5 ; do 
>      awk 'BEGIN {for(i=0;i<10000;i++)for(j=0;j<10000;j++);}' &
>   done
>
>
> When i run the script, its ok, but the next run display the next
> message:
>
>         Segmentation fault
>         
> dmesg returns:
>
>         <1>Unable to handle kernel NULL pointer dereference at virtual
>         address 0000001c
>          printing eip:
>         c01675b7
>         *pde = 00000000
>         Oops: 0002
>         CPU:    0
>         EIP:    0010:[<c01675b7>]    Not tainted
>         EFLAGS: 00010286
>         eax: 0000001c   ebx: f756c000   ecx: 00000000   edx: ffff0001
>         esi: 080ed000   edi: 080e8000   ebp: f756dd34   esp: f756da34
>         ds: 0018   es: 0018   ss: 0018
>         Process test.sh (pid: 1705, stackpage=f756d000)
>         Stack: f756da38 00000000 00000000 f59bf920 080e2000 c016c5ee
>         080e7d74 080ec93c
>                00005d74 00000003 00001812 0000009a f760a000 f762003c
>         f6457b58 00000000
>                00011e8c f6457bc0 00000001 060c0705 00000003 c02b5fac
>         f6457b00 f756c000
>         Call Trace:    [<c016c5ee>] [<c02b5fac>] [<c02af770>]
>         [<c016c1c0>] [<c015136d>]
>           [<c0150f6c>] [<c016a33f>] [<c01404eb>] [<c016a130>]
>         [<c015136d>] [<c015153d>]
>           [<c0105ba2>] [<c010a18f>] [<c01d5ffb>] [<c0105b60>]
>         [<c01d4a97>] [<c01da988>]
>           [<c010a06a>]
>         
>         Code: 0f c1 10 85 d2 0f 85 9a 15 00 00 89 3c 24 29 fe 89 74 24
>         04
>
> My cluster have 2 nodes
>
> I compile the kernel with differents optios, but the result is the same.
>
> I have many questions, for example:
>
> om have support for my hardware?
> Maybe the om conigurations is bad
> My filesystem is Reiser 3.x .... is it the problem?
> ?????
>
> any help is good for me 
>
> thanks in advance
>
>
>
>
> El sáb, 01-07-2006 a las 09:54 +0200, Gianluca escribió:
>   
>> I have patched the 2.4.31 kernel... to resolving the same problem.
>> attached you'll find my patch... you can try it ;-)
>>
>> Felipe ha scritto:
>>     
>>> I tried that also, but my pc's have the  I/O Controller Hub 7 and the
>>> libata patch for kernel 2.4.26 doesnt have support for it.
>>>
>>> then which is the best versio of om for my pc's?
>>>
>>> Do you now how can i patch the kernel 2.4.26 with the newest libata
>>> patch?
>>>
>>>
>>>
>>> El mié, 28-06-2006 a las 17:09 -0500, Brian English escribió:
>>>   
>>>       
>>>> I have tried using the Gentoo Openmosix Kernels.  Try your best to
>>>> avoidthese, especially the 2.4.30 one, as they are unstable at best.
>>>> I would get segfaults while running the OpenMosixTest package as well
>>>> as using the cluster to encode wav files to flac files. Your best bet
>>>> is to manually install the latest stable version from the site
>>>> (2.4.26) and patch the kernel for SATA support (I'm not sure on how to
>>>> do that, but I think it can be done).
>>>>     
>>>>         
>>>   
>>>
>>>
>>>
>>> Using Tomcat but need to do more? Need to support web services, security?
>>> Get stuff done quickly with pre-integrated technology to make your job easier
>>> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
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>>> _______________________________________________
>>> openMosix-general mailing list
>>> openMosix-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
>>> https://lists.sourceforge.net/lists/listinfo/openmosix-general
>>>
>>>   
>>>       
>
>
> Using Tomcat but need to do more? Need to support web services, security?
> Get stuff done quickly with pre-integrated technology to make your job easier
> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> _______________________________________________
> openMosix-general mailing list
> openMosix-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> https://lists.sourceforge.net/lists/listinfo/openmosix-general
>
>   


Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642