Re: [PATCH] free e820 reserved memory in bootargs memmap

[zoucao-ipc]

I found commit characters errors, please ignore this path, V2 will be 
sent soon

On 2018/4/8 下午2:41, zou...@linux.alibaba.com wrote:
add a new chareater "-" in bootargs memmap, you can use this chareater to free
e820 reserved memory, for example:
reserved iomem:
        cat /proc/iomem:
        ......
        00100000-6aefefff : System RAM
          01000000-0165537a : Kernel code
          0165537b-01a8873f : Kernel data
          01c31000-01f4efff : Kernel bss
          28000000-320fffff : Crash kernel
        6aeff000-6effffff : reserved       --> it is e820 reserved memory
        6f000000-78240fff : System RAM
        ......


add bootargs memmap=0x4101000-0x6aeff000, to free memory region: 
6aeff000-6effffff
then 6aeff000-6effffff will be merged into 00100000-78240fff.

new iomem:
        cat /proc/iomem:
        ......
        00100000-78240fff : System RAM
          01000000-0165537a : Kernel code
          0165537b-01a8873f : Kernel data
          01c31000-01f4efff : Kernel bss
        ......