The patch titled
Subject: mm/mglru: remove CONFIG_TRANSPARENT_HUGEPAGE
has been added to the -mm mm-unstable branch. Its filename is
mm-mglru-remove-config_transparent_hugepage.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-mglru-remove-config_transparent_hugepage.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: Kinsey Ho <kinseyho@xxxxxxxxxx>
Subject: mm/mglru: remove CONFIG_TRANSPARENT_HUGEPAGE
Date: Wed, 27 Dec 2023 14:12:05 +0000
Improve code readability by removing CONFIG_TRANSPARENT_HUGEPAGE,
since the compiler should be able to automatically optimize out the
code that promotes THPs during page table walks.
No functional changes.
Link: https://lkml.kernel.org/r/20231227141205.2200125-6-kinseyho@xxxxxxxxxx
Signed-off-by: Kinsey Ho <kinseyho@xxxxxxxxxx>
Co-developed-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
Tested-by: Donet Tom <donettom@xxxxxxxxxxxxxxxxxx>
Acked-by: Yu Zhao <yuzhao@xxxxxxxxxx>
Cc: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmscan.c | 12 +-----------
1 file changed, 1 insertion(+), 11 deletions(-)
--- a/mm/vmscan.c~mm-mglru-remove-config_transparent_hugepage
+++ a/mm/vmscan.c
@@ -3273,7 +3273,6 @@ static unsigned long get_pte_pfn(pte_t p
return pfn;
}
-#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_ARCH_HAS_NONLEAF_PMD_YOUNG)
static unsigned long get_pmd_pfn(pmd_t pmd, struct vm_area_struct *vma, unsigned long addr)
{
unsigned long pfn = pmd_pfn(pmd);
@@ -3291,7 +3290,6 @@ static unsigned long get_pmd_pfn(pmd_t p
return pfn;
}
-#endif
static struct folio *get_pfn_folio(unsigned long pfn, struct mem_cgroup *memcg,
struct pglist_data *pgdat, bool can_swap)
@@ -3394,7 +3392,6 @@ restart:
return suitable_to_scan(total, young);
}
-#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_ARCH_HAS_NONLEAF_PMD_YOUNG)
static void walk_pmd_range_locked(pud_t *pud, unsigned long addr, struct vm_area_struct *vma,
struct mm_walk *args, unsigned long *bitmap, unsigned long *first)
{
@@ -3472,12 +3469,6 @@ next:
done:
*first = -1;
}
-#else
-static void walk_pmd_range_locked(pud_t *pud, unsigned long addr, struct vm_area_struct *vma,
- struct mm_walk *args, unsigned long *bitmap, unsigned long *first)
-{
-}
-#endif
static void walk_pmd_range(pud_t *pud, unsigned long start, unsigned long end,
struct mm_walk *args)
@@ -3513,7 +3504,6 @@ restart:
continue;
}
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
if (pmd_trans_huge(val)) {
unsigned long pfn = pmd_pfn(val);
struct pglist_data *pgdat = lruvec_pgdat(walk->lruvec);
@@ -3532,7 +3522,7 @@ restart:
walk_pmd_range_locked(pud, addr, vma, args, bitmap, &first);
continue;
}
-#endif
+
walk->mm_stats[MM_NONLEAF_TOTAL]++;
if (should_clear_pmd_young()) {
_
Patches currently in -mm which might be from kinseyho@xxxxxxxxxx are
mm-mglru-add-config_arch_has_hw_pte_young.patch
mm-mglru-add-config_lru_gen_walks_mmu.patch
mm-mglru-remove-config_memcg.patch
mm-mglru-add-dummy-pmd_dirty.patch
mm-mglru-remove-config_transparent_hugepage.patch
