linux-kernel - Re: [PATCH 02/10] mm: workingset: tell cache transitions from workingset thrashing

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Date:   Wed, 25 Jul 2018 17:06:10 +0100
From:   Will Deacon <will.deacon@....com>
To:     Johannes Weiner <hannes@...xchg.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Mike Galbraith <efault@....de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        kernel-team@...com, Linux-MM <linux-mm@...ck.org>,
        Vinayak Menon <vinmenon@...eaurora.org>,
        Ingo Molnar <mingo@...hat.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Tejun Heo <tj@...nel.org>, cgroups@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Christopher Lameter <cl@...ux.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 02/10] mm: workingset: tell cache transitions from
 workingset thrashing

On Tue, Jul 24, 2018 at 04:04:48PM +0100, Will Deacon wrote:
> On Mon, Jul 23, 2018 at 12:27:35PM -0400, Johannes Weiner wrote:
> > On Mon, Jul 23, 2018 at 05:35:35PM +0200, Arnd Bergmann wrote:
> > > On Mon, Jul 23, 2018 at 5:23 PM, Johannes Weiner <hannes@...xchg.org> wrote:
> > > > diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
> > > > index 1b18b4722420..72c9b6778b0a 100644
> > > > --- a/arch/arm64/mm/init.c
> > > > +++ b/arch/arm64/mm/init.c
> > > > @@ -611,11 +611,13 @@ void __init mem_init(void)
> > > >         BUILD_BUG_ON(TASK_SIZE_32                       > TASK_SIZE_64);
> > > >  #endif
> > > >
> > > > +#ifndef CONFIG_SPARSEMEM_VMEMMAP
> > > >         /*
> > > 
> > > I tested it on two broken configurations, and found that you have
> > > a typo here, it should be 'ifdef', not 'ifndef'. With that change, it
> > > seems to build fine.
> > > 
> > > Tested-by: Arnd Bergmann <arnd@...db.de>
> > 
> > Thanks for testing it, I don't have a cross-compile toolchain set up.
> > 
> > ---
> 
> Thanks Arnd, Johannes. I can pick this up for -rc7 via the arm64 tree,
> unless it's already queued elsewhere?

I've pushed this to the arm64 for-next/fixes branch heading for -rc7.

Will