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From:   Will Deacon <will@kernel.org>
To:     Baoquan He <bhe@redhat.com>, linux-kernel@vger.kernel.org
Cc:     catalin.marinas@arm.com, kernel-team@android.com,
        Will Deacon <will@kernel.org>, thunder.leizhen@huawei.com,
        horms@kernel.org, John.p.donnelly@oracle.com,
        linux-arm-kernel@lists.infradead.org, ardb@kernel.org,
        rppt@kernel.org, kexec@lists.infradead.org
Subject: Re: [PATCH v2 0/3] arm64: kdump : take off the protection on crashkernel memory region
Date:   Tue, 11 Apr 2023 19:37:24 +0100
Message-Id: <168123748697.3041682.15156562269597498270.b4-ty@kernel.org>
In-Reply-To: <20230407011507.17572-1-bhe@redhat.com>
References: <20230407011507.17572-1-bhe@redhat.com>
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On Fri, 7 Apr 2023 09:15:04 +0800, Baoquan He wrote:
> Problem:
> =======
> On arm64, block and section mapping is supported to build page tables.
> However, currently it enforces to take base page mapping for the whole
> linear mapping if CONFIG_ZONE_DMA or CONFIG_ZONE_DMA32 is enabled and
> crashkernel kernel parameter is set. This will cause longer time of the
> linear mapping process during bootup and severe performance degradation
> during running time.
> 
> [...]

Applied to arm64 (for-next/kdump), thanks!

[1/3] arm64: kdump : take off the protection on crashkernel memory region
      https://git.kernel.org/arm64/c/0d124e96051b
[2/3] arm64: kdump: do not map crashkernel region specifically
      https://git.kernel.org/arm64/c/04a2a7af3d97
[3/3] arm64: kdump: defer the crashkernel reservation for platforms with no DMA memory zones
      https://git.kernel.org/arm64/c/504cae453f82

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev