| guide | The Linux kernel has supported the UEFI mirror memory function of x86/x86_64 in 2015, and now, Huawei is working hard to introduce this function for the AArch64/Arm64 architecture. On Thursday, Huawei engineer Wupeng Ma released the latest patch set for Linux image memory support for AArch64/Arm64 hardware. |
UEFI allows setting up partial memory mirroring based on address ranges, which has been carried over to the UEFI 2.5 specification. Memory mirroring is used to split memory into two separate technical channels, usually on a storage device such as a server.
Memory mirroring enables multiple address ranges for input/output (I/O) registers and memory because the same physical byte can access addresses in multiple places. Therefore, higher memory reliability and higher levels of memory consolidation can be achieved using memory mirroring.
Depending on the platform settings, the server can provide full mirroring (50% reserved for mirroring) or partial mirroring, usually 10~20%. It is worth noting the condition pointed out by Wupeng Ma in the mail: if no kernelcore is specified, the mirroring function will be disabled.
Friends who are interested in mirrored memory support for AArch64/Arm64 Linux servers can check more details in the Linux kernel mail published by Wupeng Ma.
For more Linux information, please check: https://www.linuxprobe.com