Re: [PATCH RFC V2 3/3] scsi_mq: enable runtime PM

Alan Stern
2018-07-18T15:01:52Z

On Wed, 18 Jul 2018, Johannes Thumshirn wrote:

> On Wed, Jul 18, 2018 at 10:12:37AM -0400, Alan Stern wrote:
> > As one extra reminder... People who care about extreme performance can
> > perfectly well disable CONFIG_PM in their kernels. That should remove
> > any overhead due to runtime PM.
>
> Yes but how likely is this for people who are running their data
> center with a distribution kernel.

Strictly speaking, that's a nonsense question. People who run
distribution kernels are 100% unlikely to change the kernel
configuration, by definition.

That's not the point. If people really care about getting the utmost
performance, to the extent that they resent the minimal overhead
required for runtime PM, then they should not be running distribution
kernels in the first place.

Alan Stern