The patch titled
Subject: mm/cma: simplify zone intersection check
has been added to the -mm mm-unstable branch. Its filename is
mm-cma-simplify-zone-intersection-check.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-cma-simplify-zone-intersection-check.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Frank van der Linden <fvdl@xxxxxxxxxx>
Subject: mm/cma: simplify zone intersection check
Date: Mon, 27 Jan 2025 23:22:03 +0000
cma_activate_area walks all pages in the area, checking their zone
individually to see if the area resides in more than one zone.
Make this a little more efficient by using the recently introduced
pfn_range_intersects_zones() function. Store the NUMA node id (if any) in
the cma structure to facilitate this.
Link: https://lkml.kernel.org/r/20250127232207.3888640-24-fvdl@xxxxxxxxxx
Signed-off-by: Frank van der Linden <fvdl@xxxxxxxxxx>
Cc: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Heiko Carstens <hca@xxxxxxxxxxxxx>
Cc: Joao Martins <joao.m.martins@xxxxxxxxxx>
Cc: Madhavan Srinivasan <maddy@xxxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Roman Gushchin (Cruise) <roman.gushchin@xxxxxxxxx>
Cc: Usama Arif <usama.arif@xxxxxxxxxxxxx>
Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Cc: Yu Zhao <yuzhao@xxxxxxxxxx>
Cc: Zhenguo Yao <yaozhenguo1@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/cma.c | 13 ++++++-------
mm/cma.h | 2 ++
2 files changed, 8 insertions(+), 7 deletions(-)
--- a/mm/cma.c~mm-cma-simplify-zone-intersection-check
+++ a/mm/cma.c
@@ -103,7 +103,6 @@ static void __init cma_activate_area(str
{
unsigned long pfn, base_pfn;
int allocrange, r;
- struct zone *zone;
struct cma_memrange *cmr;
for (allocrange = 0; allocrange < cma->nranges; allocrange++) {
@@ -124,12 +123,8 @@ static void __init cma_activate_area(str
* CMA resv range to be in the same zone.
*/
WARN_ON_ONCE(!pfn_valid(base_pfn));
- zone = page_zone(pfn_to_page(base_pfn));
- for (pfn = base_pfn + 1; pfn < base_pfn + cmr->count; pfn++) {
- WARN_ON_ONCE(!pfn_valid(pfn));
- if (page_zone(pfn_to_page(pfn)) != zone)
- goto cleanup;
- }
+ if (pfn_range_intersects_zones(cma->nid, base_pfn, cmr->count))
+ goto cleanup;
for (pfn = base_pfn; pfn < base_pfn + cmr->count;
pfn += pageblock_nr_pages)
@@ -261,6 +256,7 @@ int __init cma_init_reserved_mem(phys_ad
cma->ranges[0].base_pfn = PFN_DOWN(base);
cma->ranges[0].count = cma->count;
cma->nranges = 1;
+ cma->nid = NUMA_NO_NODE;
*res_cma = cma;
@@ -497,6 +493,7 @@ int __init cma_declare_contiguous_multi(
}
cma->nranges = nr;
+ cma->nid = nid;
*res_cma = cma;
out:
@@ -684,6 +681,8 @@ static int __init __cma_declare_contiguo
if (ret)
memblock_phys_free(base, size);
+ (*res_cma)->nid = nid;
+
return ret;
}
--- a/mm/cma.h~mm-cma-simplify-zone-intersection-check
+++ a/mm/cma.h
@@ -48,6 +48,8 @@ struct cma {
struct cma_kobject *cma_kobj;
#endif
bool reserve_pages_on_error;
+ /* NUMA node (NUMA_NO_NODE if unspecified) */
+ int nid;
};
extern struct cma cma_areas[MAX_CMA_AREAS];
_
Patches currently in -mm which might be from fvdl@xxxxxxxxxx are
mm-cma-export-total-and-free-number-of-pages-for-cma-areas.patch
mm-cma-support-multiple-contiguous-ranges-if-requested.patch
mm-cma-introduce-cma_intersects-function.patch
mm-hugetlb-use-cma_declare_contiguous_multi.patch
mm-hugetlb-fix-round-robin-bootmem-allocation.patch
mm-hugetlb-remove-redundant-__clearpagereserved.patch
mm-hugetlb-use-online-nodes-for-bootmem-allocation.patch
mm-hugetlb-convert-cmdline-parameters-from-setup-to-early.patch
x86-mm-make-register_page_bootmem_memmap-handle-pte-mappings.patch
mm-bootmem_info-export-register_page_bootmem_memmap.patch
mm-sparse-allow-for-alternate-vmemmap-section-init-at-boot.patch
mm-hugetlb-set-migratetype-for-bootmem-folios.patch
mm-define-__init_reserved_page_zone-function.patch
mm-hugetlb-check-bootmem-pages-for-zone-intersections.patch
mm-sparse-add-vmemmap__hvo-functions.patch
mm-hugetlb-deal-with-multiple-calls-to-hugetlb_bootmem_alloc.patch
mm-hugetlb-move-huge_boot_pages-list-init-to-hugetlb_bootmem_alloc.patch
mm-hugetlb-add-pre-hvo-framework.patch
mm-hugetlb_vmemmap-fix-hugetlb_vmemmap_restore_folios-definition.patch
mm-hugetlb-do-pre-hvo-for-bootmem-allocated-pages.patch
x86-setup-call-hugetlb_bootmem_alloc-early.patch
x86-mm-set-arch_want_sparsemem_vmemmap_preinit.patch
mm-cma-simplify-zone-intersection-check.patch
mm-cma-introduce-a-cma-validate-function.patch
mm-cma-introduce-interface-for-early-reservations.patch
mm-hugetlb-add-hugetlb_cma_only-cmdline-option.patch
mm-hugetlb-enable-bootmem-allocation-from-cma-areas.patch
