Re: Performance issue since 3.2.6

From: Olivier Doucet
Date: Fri May 17 2013 - 14:17:45 EST


This performance penalty is still present in kernel 3.9.2. And
CONFIG_PM cannot be deactivated anymore.

I was able to make a working 3.9.2 (meaning with no penalty) with
following config and patch :

Patch :

I know this patch is not perfect because it is just equivalent to
rollback commit f51d67a64f32cd81ea8b67ca964fb7cf7e783b2e ;

I really want this to be fixed in kernel, so I would be glad to test
any patch / config file you want.

2013/2/12 Olivier Doucet <webmaster@xxxxxxxxx>
> Hello,
> A quick update on my latest tests :
> I was able to compile a working 3.7.1 kernel (by 'working', I mean
> with no performance penalty). I'm sure 3.7.7 will be OK also (do you
> want me to test latest RC of 3.8 ?)
> I had to disable CONFIG_ACPI_PROCESSOR to disable power management.
> So now these two options are unset :
> I've posted the whole .config file here :
> I'll be glad to test any patch that may help reactivate PM on my
> system (CPU Intel Xeon L5630)
> Olivier
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