linux-kernel - Re: [PATCH v3 1/8] arm64: mm: Move reserve_crashkernel() into mem

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Message-ID: <20201015084008.GB4537@willie-the-truck>
Date:   Thu, 15 Oct 2020 09:40:09 +0100
From:   Will Deacon <will@...nel.org>
To:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Cc:     robh+dt@...nel.org, catalin.marinas@....com, hch@....de,
        ardb@...nel.org, linux-kernel@...r.kernel.org,
        robin.murphy@....com, linux-arm-kernel@...ts.infradead.org,
        linux-rpi-kernel@...ts.infradead.org, jeremy.linton@....com,
        iommu@...ts.linux-foundation.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v3 1/8] arm64: mm: Move reserve_crashkernel() into
 mem_init()

On Wed, Oct 14, 2020 at 09:12:03PM +0200, Nicolas Saenz Julienne wrote:
> crashkernel might reserve memory located in ZONE_DMA. We plan to delay
> ZONE_DMA's initialization after unflattening the devicetree and ACPI's
> boot table initialization, so move it later in the boot process.
> Specifically into mem_init(), this is the last place crashkernel will be
> able to reserve the memory before the page allocator kicks in and there is
> no need to do it earlier.
> 
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
> ---
>  arch/arm64/mm/init.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Please can you cc me on the whole series next time? I know different
maintainers have different preferences here, but I find it much easier to
figure out what's happening when I can see all of the changes together.

Thanks,

Will