linux-kernel - Re: [PATCH 0/2] arm64: mm: fix kdump broken with ZONE

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Date:   Wed, 20 Jan 2021 12:40:55 +0000
From:   Will Deacon <will@...nel.org>
To:     Chen Zhou <chenzhou10@...wei.com>
Cc:     catalin.marinas@....com, ardb@...nel.org,
        akpm@...ux-foundation.org, rppt@...nel.org, nsaenzjulienne@...e.de,
        song.bao.hua@...ilicon.com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, huawei.libin@...wei.com,
        xiexiuqi@...wei.com
Subject: Re: [PATCH 0/2] arm64: mm: fix kdump broken with ZONE_DMA
 reintroduced

On Sat, Dec 26, 2020 at 11:35:55AM +0800, Chen Zhou wrote:
> If the memory reserved for crash dump kernel falled in ZONE_DMA32,
> the devices in crash dump kernel need to use ZONE_DMA will alloc fail.
>            
> Fix this by reserving low memory in ZONE_DMA if CONFIG_ZONE_DMA is
> enabled, otherwise, reserving in ZONE_DMA32.
> 
> Patch 1 updates the comments about the ZONE_DMA.
> Patch 2 fix kdump broken.
> 
> Chen Zhou (2):
>   arm64: mm: update the comments about ZONE_DMA
>   arm64: mm: fix kdump broken with ZONE_DMA reintroduced

Please can you repost this if it is still needed after the changes that
landed in -rc4?

Will