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xterat/PMEM_emulation.md

Last active July 31, 2017 02:31
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PMEM_emulation.md

PMEM emulation

  1. make sure the kernel version is 4.x;
  2. edit /etc/default/grub:
GRUB_CMDLINE_LINUX="memmap=nn[KMG]!ss[KMG]"

this command reserve physical memory region [ss, ss + nn], the unit could be [KB, MB, GB]; if more than one persistent memory is needed, add more command:

GRUB_CMDLINE_LINUX="memmap=nn1[KMG]!ss1[KMG] memmap=nn2[KMG]!ss2[KMG]"
  1. execute grub-mkconfig -o /boot/grub/grub.cfg to update grub;
  2. reboot, and new persistent memory will be shown as /dev/pmem[01234...]
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