Re: [PATCH 0/9] psi: pressure stall information for CPU, memory, and IO v4

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On Wed, Sep 05, 2018 at 05:43:03PM -0400, Johannes Weiner wrote:
> On Tue, Aug 28, 2018 at 01:22:49PM -0400, Johannes Weiner wrote:
> > This version 4 of the PSI series incorporates feedback from Peter and
> > fixes two races in the lockless aggregator that Suren found in his
> > testing and which caused the sample calculation to sometimes underflow
> > and record bogusly large samples; details at the bottom of this email.
> 
> Peter, do the changes from v3 look sane to you?
> 
> If there aren't any further objections, I was hoping we could get this
> lined up for 4.20.

I suppose it looks ok, there's a few small nits, but nothing big.

I still hate psi_ttwu_dequeue(), but I don't really know what to about
that.

So yeah, grudingly acked. Did you want me to pick this up through the
scheduler tree since most of this lives there?



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