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Subject: Re: [PATCH 0/2] arm64: mm: fix kdump broken with ZONE_DMA
 reintroduced
To:     Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>
References: <20201226033557.116251-1-chenzhou10@huawei.com>
 <20210120124054.GA19504@willie-the-truck> <20210120130741.GB2642@gaia>
CC:     <ardb@kernel.org>, <akpm@linux-foundation.org>, <rppt@kernel.org>,
        <nsaenzjulienne@suse.de>, <song.bao.hua@hisilicon.com>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, <huawei.libin@huawei.com>,
        <xiexiuqi@huawei.com>
From:   chenzhou <chenzhou10@huawei.com>
Message-ID: <aad956d1-8992-c62f-777d-6e78307c057d@huawei.com>
Date:   Thu, 21 Jan 2021 10:37:34 +0800
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Hi Will, Catalin,


On 2021/1/20 21:07, Catalin Marinas wrote:
> On Wed, Jan 20, 2021 at 12:40:55PM +0000, Will Deacon wrote:
>> 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?
> I don't think this series is needed anymore but I'll let Chen confirm.
Yes, we don't need this series, Catalin has solved the issue i mentioned.

I will repost the series "support reserving crashkernel above 4G on arm64 kdump"
based on the latest code.

Thanks,
Chen Zhou