linux-kernel - Re: [PATCH v6 3/4] arm64: use both ZONE_DMA and ZONE

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Date:   Mon, 21 Oct 2019 13:25:11 -0400
From:   Qian Cai <cai@....pw>
To:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Cc:     linux-rpi-kernel@...ts.infradead.org, f.fainelli@...il.com,
        will@...nel.org, marc.zyngier@....com, catalin.marinas@....com,
        linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        linux-mm@...ck.org, mbrugger@...e.com, wahrenst@....net,
        phill@...pberrypi.org, Robin Murphy <Robin.Murphy@....com>,
        Christoph Hellwig <hch@....de>,
        linux-arm-kernel@...ts.infradead.org, m.szyprowski@...sung.com
Subject: Re: [PATCH v6 3/4] arm64: use both ZONE_DMA and ZONE_DMA32



> On Oct 21, 2019, at 1:01 PM, Nicolas Saenz Julienne <nsaenzjulienne@...e.de> wrote:
> 
> Could you enable CMA debugging to see if anything interesting comes out of it.

I did but nothing interesting came out. Did you use the same config I gave? Also, it has those cmdline.

page_poison=on page_owner=on numa_balancing=enable \
systemd.unified_cgroup_hierarchy=1 debug_guardpage_minorder=1 \
page_alloc.shuffle=1