Messages in this thread | | | Date | Fri, 7 Apr 2023 14:03:52 +0200 | From | Simon Horman <> | Subject | Re: [PATCH -next v3 1/2] riscv: kdump: Implement crashkernel=X,[high,low] |
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On Fri, Apr 07, 2023 at 05:06:24PM +0800, Guo Ren wrote: > On Thu, Apr 6, 2023 at 10:06 PM Chen Jiahao <chenjiahao16@huawei.com> wrote: > > > > On riscv, the current crash kernel allocation logic is trying to > > allocate within 32bit addressible memory region by default, if > > failed, try to allocate without 4G restriction. > > > > In need of saving DMA zone memory while allocating a relatively large > > crash kernel region, allocating the reserved memory top down in > > high memory, without overlapping the DMA zone, is a mature solution. > > Here introduce the parameter option crashkernel=X,[high,low]. > > > > One can reserve the crash kernel from high memory above DMA zone range > > by explicitly passing "crashkernel=X,high"; or reserve a memory range > > below 4G with "crashkernel=X,low". > Asked-by: Guo Ren <guoren@kernel.org>
Perhaps 'Acked-by' :)
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