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Date:   Fri, 7 Sep 2018 09:46:42 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     Johannes Weiner <hannes@cmpxchg.org>
Cc:     Ingo Molnar <mingo@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Tejun Heo <tj@kernel.org>,
        Suren Baghdasaryan <surenb@google.com>,
        Daniel Drake <drake@endlessm.com>,
        Vinayak Menon <vinmenon@codeaurora.org>,
        Christopher Lameter <cl@linux.com>,
        Peter Enderborg <peter.enderborg@sony.com>,
        Shakeel Butt <shakeelb@google.com>,
        Mike Galbraith <efault@gmx.de>, linux-mm@kvack.org,
        cgroups@vger.kernel.org, linux-kernel@vger.kernel.org,
        kernel-team@fb.com
Subject: Re: [PATCH 0/9] psi: pressure stall information for CPU, memory, and
 IO v4
Message-ID: <20180907074642.GN24106@hirez.programming.kicks-ass.net>
References: <20180828172258.3185-1-hannes@cmpxchg.org>
 <20180905214303.GA30178@cmpxchg.org>
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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?

I'll go have a look.