[uml-devel] UML freezes at hdd-intensive processes

[uml-devel] UML freezes at hdd-intensive processes

[Oliver Baltz]

Hi @all,

my UML hangs while intensive processes that use the HDD. For example:
rgrep, upgrade,...

UML-Hostsystem: 2.4.27-1-386, Intel ICH5 SATA 150-Controller
UML: 2.4.26-3um-1

Any ideas?







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[uml-devel] UML freezes at hdd-intensive processes

[Oliver Baltz]

Hi @all,

my UML hangs while intensive processes that use the HDD. For example:
rgrep, upgrade,...

UML-Hostsystem: 2.4.27-1-386, Intel ICH5 SATA 150-Controller
UML: 2.4.26-3um-1

Any ideas?











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Re: [uml-devel] UML freezes at hdd-intensive processes

[Rob Landley]

On Thursday 03 March 2005 05:41 am, Oliver Baltz wrote:
> Hi @all,
>
> my UML hangs while intensive processes that use the HDD. For example:
> rgrep, upgrade,...
>
> UML-Hostsystem: 2.4.27-1-386, Intel ICH5 SATA 150-Controller
> UML: 2.4.26-3um-1
>
> Any ideas?

I haven't seen this on 2.6, but I think the first question is what kind of 
filesystem are you using?  Hostfs?  NFS?  UBD mount?

Rob


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Re: [uml-devel] UML freezes at hdd-intensive processes

[Blaisorblade]

On Thursday 03 March 2005 11:41, Oliver Baltz wrote:
> Hi @all,
>
> my UML hangs while intensive processes that use the HDD. For example:
> rgrep, upgrade,...
>
> UML-Hostsystem: 2.4.27-1-386, Intel ICH5 SATA 150-Controller
> UML: 2.4.26-3um-1
>
> Any ideas?
Tell us the result:

grep CONFIG_BLK_DEV_UBD_SYNC .config

And search CONFIG_BLK_DEV_UBD_SYNC in the archives at marc.theaimsgroup.com. 
The problem was discussed for 2.6 only, the solution also applies to 2.4 
(almost surely).
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729
http://www.user-mode-linux.org/~blaisorblade





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Re: [uml-devel] UML freezes at hdd-intensive processes

[Oliver Baltz]

Hi,

>> > Have you tried attaching it to the host console thingy, or running
UML under
>> > gdb and breaking in to see what it's doing when it hangs?  (Also, if
>> you
>> > can
>> > get it to respond to the magic sysrq, you can get a thread dump...)

My conclusion: The UML does not respond even to a "sysrq" :(

CONFIG_BLK_DEV_UBD_SYNC is NOT compiled in.

You can find my strace-output of the uml-process here:
http://root.baltz-online.de/files/strace-uml-freeze.txt.gz
I hope that there is somebody out there who can hear my scream for help.

I did a UML-setup on a second machine with absolutely different hardware.
But this UML hangs on hdd-intensive processes, too :(
I setup the UMLs follwing this HOWTO:
http://oliverbaltz.de/index.php?id=101. Perhaps you can find a failure in
this documentation.

Thanks for help.
Olli




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