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Date: Mon, 16 May 2022 20:06:51 +0100 From: Catalin Marinas <catalin.marinas@....com> To: Dave Young <dyoung@...hat.com>, kexec@...ts.infradead.org, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, Will Deacon <will@...nel.org>, Zhen Lei <thunder.leizhen@...wei.com>, Baoquan He <bhe@...hat.com>, Vivek Goyal <vgoyal@...hat.com>, linux-doc@...r.kernel.org, Jonathan Corbet <corbet@....net> Cc: Chen Zhou <dingguo.cz@...group.com>, Randy Dunlap <rdunlap@...radead.org>, John Donnelly <John.p.donnelly@...cle.com>, Dave Kleikamp <dave.kleikamp@...cle.com>, Kefeng Wang <wangkefeng.wang@...wei.com>, Feng Zhou <zhoufeng.zf@...edance.com>, "Eric W . Biederman" <ebiederm@...ssion.com> Subject: Re: [PATCH] arm64: kdump: Do not allocate crash low memory if not needed On Wed, 11 May 2022 11:20:32 +0800, Zhen Lei wrote: > When "crashkernel=X,high" is specified, the specified "crashkernel=Y,low" > memory is not required in the following corner cases: > 1. If both CONFIG_ZONE_DMA and CONFIG_ZONE_DMA32 are disabled, it means > that the devices can access any memory. > 2. If the system memory is small, the crash high memory may be allocated > from the DMA zones. If that happens, there's no need to allocate > another crash low memory because there's already one. > > [...] Applied to arm64 (for-next/crashkernel), thanks! [1/1] arm64: kdump: Do not allocate crash low memory if not needed https://git.kernel.org/arm64/c/8f0f104e2ab6 -- Catalin
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