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Date:   Sun, 3 Jul 2022 16:35:31 -0700
From:   Andrew Morton <akpm@linux-foundation.org>
To:     Yu Zhao <yuzhao@google.com>
Cc:     Mel Gorman <mgorman@techsingularity.net>,
        Nicolas Saenz Julienne <nsaenzju@redhat.com>,
        Marcelo Tosatti <mtosatti@redhat.com>,
        Vlastimil Babka <vbabka@suse.cz>,
        Michal Hocko <mhocko@kernel.org>,
        Hugh Dickins <hughd@google.com>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Linux-MM <linux-mm@kvack.org>
Subject: Re: [PATCH v5 00/7] Drain remote per-cpu directly
Message-Id: <20220703163531.beed10c723f1c74a9001573c@linux-foundation.org>
In-Reply-To: <CAOUHufZj87ewG6_OObmDByxHv51DgbkB-O6oMitw72QF1JrkcQ@mail.gmail.com>
References: <20220624125423.6126-1-mgorman@techsingularity.net>
        <20220703162821.f097d6e4b3e2a0114820a8d9@linux-foundation.org>
        <CAOUHufZj87ewG6_OObmDByxHv51DgbkB-O6oMitw72QF1JrkcQ@mail.gmail.com>
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On Sun, 3 Jul 2022 17:31:09 -0600 Yu Zhao <yuzhao@google.com> wrote:

> > > This series adjusts the locking.  A spinlock is added to struct
> > > per_cpu_pages to protect the list contents while local_lock_irq is
> > > ultimately replaced by just the spinlock in the final patch.  This allows
> > > a remote CPU to safely. Follow-on work should allow the spin_lock_irqsave
> > > to be converted to spin_lock to avoid IRQs being disabled/enabled in
> > > most cases. The follow-on patch will be one kernel release later as it
> > > is relatively high risk and it'll make bisections more clear if there
> > > are any problems.
> >
> > I plan to move this and Mel's fix to [7/7] into mm-stable around July 8.
> 
> I've thrown it together with the Maple Tree and passed a series of stress tests.

Cool, thanks.  I added your Tested-by: to everything.