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tools/mm/thp_swap_allocator_test: fix small folio alignment

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Use ALIGNMENT_SMALLFOLIO instead of ALIGNMENT_MTHP when allocating small
folios to ensure correct memory alignment for the test case.

Before: test allocates small folios with 64KB alignment
(ALIGNMENT_MTHP) when only 4KB alignment (ALIGNMENT_SMALLFOLIO) is
needed.  This wastes address space and may cause allocation failures on
systems with fragmented memory.

Worst-case impact: this only affects thp_swap_allocator_test tool
behavior.

Link: https://lkml.kernel.org/r/20251209031745.2723120-1-kaushlendra.kumar@intel.com
Signed-off-by: Kaushlendra Kumar <kaushlendra.kumar@intel.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Kaushlendra Kumar 2025-12-09 08:47:45 +05:30 • committed by Andrew Morton
parent 6e4930e333
commit 9f5edd785d
1 changed files with 1 additions and 1 deletions
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2
tools/mm/thp_swap_allocator_test.c
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@ -142,7 +142,7 @@ int main(int argc, char *argv[])
}
if (use_small_folio) {
mem2 = aligned_alloc_mem(MEMSIZE_SMALLFOLIO, ALIGNMENT_MTHP);
mem2 = aligned_alloc_mem(MEMSIZE_SMALLFOLIO, ALIGNMENT_SMALLFOLIO);
if (mem2 == NULL) {
fprintf(stderr, "Failed to allocate small folios memory\n");
free(mem1);