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[bug #39861] Grub2 collapses unknown e820 memory types to reserved
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From: |
Andrew Lutomirski |
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Subject: |
[bug #39861] Grub2 collapses unknown e820 memory types to reserved |
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Date: |
Mon, 26 Aug 2013 19:06:41 +0000 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:23.0) Gecko/20100101 Firefox/23.0 |
Follow-up Comment #2, bug #39861 (project grub):
My board has an NVDIMM, and BIOS reports the NVDIMM mapping as e820 type 12.
Stock Linux kernels treat unknown e820 types the same as reserved, and an
NVDIMM-enabled kernel will see type 12 memory and use the NVDIMM. Syslinux
passes type 12 straight through, but grub2 changes type 12 to type 2, breaking
the whole mechanism.
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