kern/104406: [ufs] Processes get stuck in "ufs" state under
persistent CPU load
Rainer Hurling
Rainer.Hurling at nw-fva.de
Wed Oct 31 06:45:30 PDT 2007
Thanks for your answer.
Kris Kennaway schrieb:
> Rainer Hurling wrote:
>> Looking into PR kern/104406 it seems, that this describes exactly what
>> I am experiencing on three of my systems over the last weeks. They are
>> running FreeBSD 8.0-CURRENT (known as 7.0-CURRENT not long ago ;-) ).
>
> Actually it sounds nothing like it at all ;)
>
>> On these machines I often observe hangings, sometimes only a few
>> seconds, on other times 20-30 seconds before input/output is back.
>> This seems to happen when more extensive disk usage is needed
>> (portupgrade, buildworld, browsing complicated websites etc.). During
>> the hang even xterm is not responding any more, other (diskless)
>> applications like xclock keep to continue. I have no panics, only UFS
>> (and MSDOSFS) are mounted, no NTFS. About two months ago none of my
>> systems showed these hangings.
>
> Is your system swapping? This is the usual cause of pauses during high
> application (actually memory) load.
>
> Kris
No, I am working with 2GB RAM, without swapping at all.
In the meantime I tested the above described behaviour a little more.
The hangings even appeared without using Xorg, only working on consoles
under heavy disk usage (portupgrade etc.).
Rainer
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