Re: high overhead of functions blkg_*stats_* in bfq

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> Il giorno 06 nov 2017, alle ore 17:30, Tejun Heo <tj@xxxxxxxxxx> ha scritto:
> 
> Hello,
> 
> On Mon, Nov 06, 2017 at 05:26:38PM +0100, Paolo Valente wrote:
>> Yes.  DEBUG_BLK_CGROUP will just serve to keep the for-debugging
>> subset switched off even when the dynamic parameter is on.
>> 
>> We'll wait for possible counter-arguments from Tejun, and then start
>> to work on what you propose.
> 
> So, I think the only *really* required ones are io_serviced and the
> corresponding byte counts, which are tracked by blk-cgroup core
> anyway.  Everything else can be hidden behind an obviously debug boot
> param, say, bfq.__DEBUG__extra_stats or whatever.
> 

ok, can we change it, or do you want us to change it, for cfq too?

Thanks,
Paolo

> Thanks.
> 
> -- 
> tejun





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