Re: default kernel-mISDN and high cpu-load by ksoftirqd

Am 11.07.2012 14:35, schrieb Patrick Lists:
> On 11-07-12 12:32, Karsten Keil wrote:
>> Am 09.07.2012 21:36, schrieb Dirk Rieger:
>>> Hi all,
>>>
>>> I had problems with high cpu-load from ksoftirqd for the last years
>>> caused by mISDN_dsp. I always used standard-Kernels distributed with
>>> debian or ubuntu up to 12.04 lts. Today I compiled mISDN from git and
>>> the problem disappeared - at least for about 12 hours.
>>> Maybe there is someone to crosscheck this and able to fix this for the
>>> kernel-distributed mISDN_dsp module.
>>>
>>
>> This fix is together with others  in 3.5.
> 
> Hi Karsten,
> 
> Not sure if applicable but what about CentOS 6 with its 2.6.32 kernel?
> Is the fix part of the mISDN code on misdn.eu or would a fix need to be
> backported to the CentOS/RHEL 2.6.32 kernel?
> 

Normally git.misdn.eu can be build for any kernel >= 2.6.19, patches to
remove features from newer kernel are applied automatically during the
build. So you can build modules for this kernel, and make sure that
the installdir (default extra) is searched before the
kernel/drivers/isdn directory.
Or you build a patch to the CentOS kernel and compile your own kernel.
The easiest way to get a patch is to use mISDN socket branch from
git.mISDN.eu run ./configure with the CentOS kernel and produce a diff
to the standalone/ directory.
You need to take care for the include files and the #include statements,
they are renamed for the standalone builds to not conflict with the
files in the kernel itself.

Karsten