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mm, slab: restore NUMA policy support for large kmalloc

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commit e2d18cbf17 upstream.

The slab allocator observes the task's NUMA policy in various places
such as allocating slab pages. Large kmalloc() allocations used to do
that too, until an unintended change by c4cab55752 ("mm/slab_common:
cleanup kmalloc_large()") resulted in ignoring mempolicy and just
preferring the local node. Restore the NUMA policy support.

Fixes: c4cab55752 ("mm/slab_common: cleanup kmalloc_large()")
Cc: <stable@vger.kernel.org>
Acked-by: Christoph Lameter (Ampere) <cl@gentwo.org>
Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vlastimil Babka 2025-06-02 13:02:12 +02:00 committed by Greg Kroah-Hartman
parent f26e537666
commit c725d61627
1 changed files with 6 additions and 1 deletions
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7
mm/slub.c
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@ -4269,7 +4269,12 @@ static void *___kmalloc_large_node(size_t size, gfp_t flags, int node)
flags = kmalloc_fix_flags(flags);
flags |= __GFP_COMP;
folio = (struct folio *)alloc_pages_node_noprof(node, flags, order);
if (node == NUMA_NO_NODE)
folio = (struct folio *)alloc_pages_noprof(flags, order);
else
folio = (struct folio *)__alloc_pages_noprof(flags, order, node, NULL);
if (folio) {
ptr = folio_address(folio);
lruvec_stat_mod_folio(folio, NR_SLAB_UNRECLAIMABLE_B,