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@xxxxxxxxxx> 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@xxxxxxxxxx> Perhaps 'Acked-by' :)
