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memblock: allow zero threshold in validate_numa_converage()

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BugLink: https://bugs.launchpad.net/bugs/2102118

commit 9cdc6423acb49055efb444ecd895d853a70ef931 upstream.

Currently memblock validate_numa_converage() returns false negative when
threshold set to zero.

Make the check if the memory size with invalid node ID is greater than
the threshold exclusive to fix that.

Link: https://lore.kernel.org/all/Z0mIDBD4KLyxyOCm@kernel.org/
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Mike Rapoport (Microsoft)
2025-03-12 22:51:00 +09:00
committed by Stefan Bader
parent 84b6e9df37
commit cfaa1b6f38
1 changed files with 2 additions and 2 deletions
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mm/memblock.c
+2 -2
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@@ -738,7 +738,7 @@ int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size)
/**
* memblock_validate_numa_coverage - check if amount of memory with
* no node ID assigned is less than a threshold
* @threshold_bytes: maximal number of pages that can have unassigned node
* @threshold_bytes: maximal memory size that can have unassigned node
* ID (in bytes).
*
* A buggy firmware may report memory that does not belong to any node.
@@ -758,7 +758,7 @@ bool __init_memblock memblock_validate_numa_coverage(unsigned long threshold_byt
nr_pages += end_pfn - start_pfn;
}
if ((nr_pages << PAGE_SHIFT) >= threshold_bytes) {
if ((nr_pages << PAGE_SHIFT) > threshold_bytes) {
mem_size_mb = memblock_phys_mem_size() >> 20;
pr_err("NUMA: no nodes coverage for %luMB of %luMB RAM\n",
(nr_pages << PAGE_SHIFT) >> 20, mem_size_mb);