Messages in this thread Patch in this message | | | From | Jia He <> | Subject | [PATCH 1/3] arm64/numa: set numa_off to false when numa node is fake | Date | Mon, 6 Jul 2020 09:19:45 +0800 |
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Previously, numa_off is set to true unconditionally in dummy_numa_init(), even if there is a fake numa node.
But acpi will translate node id to NUMA_NO_NODE(-1) in acpi_map_pxm_to_node() because it regards numa_off as turning off the numa node.
Without this patch, pmem can't be probed as a RAM device on arm64 if SRAT table isn't present.
$ndctl create-namespace -fe namespace0.0 --mode=devdax --map=dev -s 1g -a 64K kmem dax0.0: rejecting DAX region [mem 0x240400000-0x2bfffffff] with invalid node: -1 kmem: probe of dax0.0 failed with error -22
This fixes it by setting numa_off to false.
Signed-off-by: Jia He <justin.he@arm.com> --- arch/arm64/mm/numa.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c index aafcee3e3f7e..7689986020d9 100644 --- a/arch/arm64/mm/numa.c +++ b/arch/arm64/mm/numa.c @@ -440,7 +440,8 @@ static int __init dummy_numa_init(void) return ret; } - numa_off = true; + /* force numa_off to be false since we have a fake numa node here */ + numa_off = false; return 0; } -- 2.17.1
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