Hello, 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 : CONFIG_PM=y CONFIG_PM_SLEEP=y CONFIG_PM_SLEEP_SMP=y CONFIG_CPU_IDLE=y CONFIG_ACPI=y CONFIG_ACPI_PROCESSOR=y Patch : https://gist.github.com/odoucet/5600630 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 <[email protected]> > > 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 : > CONFIG_CPU_IDLE > CONFIG_ACPI_PROCESSOR > > I've posted the whole .config file here : > https://gist.github.com/odoucet/4773390 > > I'll be glad to test any patch that may help reactivate PM on my > system (CPU Intel Xeon L5630) > > Olivier -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
