When add cmdline memmap=1M!2047M, the iomem will be 7ef00001-7fefffff : RAM
buffer 7ff00000-7fffffff : Persistent Memory (legacy) 7ff00000-7ff00fff :
MSFT0101:00,
so ramoops.mem_address=0x7ff00000.

Lukas Odzioba <lukas.odzioba@gmail.com> 于 2019年10月21日周一 下午4:39写道：

> youling257 <youling257@gmail.com> wrote:
> >
> > I don't know my ramoops.mem_address, please help me.
> >
> > what is ramoops.mem_address?
>
> It is a Linux kernel parameter, see documentation below:
> https://www.kernel.org/doc/Documentation/admin-guide/ramoops.rst
>
> It requires memory which can hold data between reboots, so i'm not
> sure how it will suit your case.
>
> Thanks,
> Lukas
>