Re: [PATCH -next v3 1/2] riscv: kdump: Implement crashkernel=X,[high,low]

Guo Ren
2023-04-11T01:38:38Z

On Fri, Apr 7, 2023 at 8:03 PM Simon Horman <horms@kernel.org> wrote:
>
> 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' :)
Sorry, my typo.

Acked-by: Guo Ren <guoren@kernel.org>

--
Best Regards
Guo Ren