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Some backported patches generated with git-format-patch were not refreshed. Use 'make target/linux/refresh' to align them with OpenWrt's patch style. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
136 lines
4.5 KiB
Diff
136 lines
4.5 KiB
Diff
From fc0e3b06e0f19917b7ecad7967a72f61d4743644 Mon Sep 17 00:00:00 2001
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From: "T.J. Alumbaugh" <talumbau@google.com>
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Date: Wed, 18 Jan 2023 00:18:26 +0000
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Subject: [PATCH 17/19] UPSTREAM: mm: multi-gen LRU: improve walk_pmd_range()
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Improve readability of walk_pmd_range() and walk_pmd_range_locked().
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Link: https://lkml.kernel.org/r/20230118001827.1040870-7-talumbau@google.com
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Change-Id: Ia084fbf53fe989673b7804ca8ca520af12d7d52a
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Signed-off-by: T.J. Alumbaugh <talumbau@google.com>
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Cc: Yu Zhao <yuzhao@google.com>
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Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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(cherry picked from commit b5ff4133617d0eced35b685da0bd0929dd9fabb7)
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Bug: 274865848
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Signed-off-by: T.J. Mercier <tjmercier@google.com>
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---
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mm/vmscan.c | 40 ++++++++++++++++++++--------------------
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1 file changed, 20 insertions(+), 20 deletions(-)
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--- a/mm/vmscan.c
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+++ b/mm/vmscan.c
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@@ -3980,8 +3980,8 @@ restart:
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}
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#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_ARCH_HAS_NONLEAF_PMD_YOUNG)
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-static void walk_pmd_range_locked(pud_t *pud, unsigned long next, struct vm_area_struct *vma,
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- struct mm_walk *args, unsigned long *bitmap, unsigned long *start)
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+static void walk_pmd_range_locked(pud_t *pud, unsigned long addr, struct vm_area_struct *vma,
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+ struct mm_walk *args, unsigned long *bitmap, unsigned long *first)
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{
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int i;
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pmd_t *pmd;
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@@ -3994,18 +3994,19 @@ static void walk_pmd_range_locked(pud_t
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VM_WARN_ON_ONCE(pud_leaf(*pud));
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/* try to batch at most 1+MIN_LRU_BATCH+1 entries */
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- if (*start == -1) {
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- *start = next;
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+ if (*first == -1) {
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+ *first = addr;
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+ bitmap_zero(bitmap, MIN_LRU_BATCH);
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return;
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}
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- i = next == -1 ? 0 : pmd_index(next) - pmd_index(*start);
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+ i = addr == -1 ? 0 : pmd_index(addr) - pmd_index(*first);
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if (i && i <= MIN_LRU_BATCH) {
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__set_bit(i - 1, bitmap);
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return;
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}
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- pmd = pmd_offset(pud, *start);
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+ pmd = pmd_offset(pud, *first);
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ptl = pmd_lockptr(args->mm, pmd);
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if (!spin_trylock(ptl))
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@@ -4016,15 +4017,16 @@ static void walk_pmd_range_locked(pud_t
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do {
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unsigned long pfn;
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struct folio *folio;
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- unsigned long addr = i ? (*start & PMD_MASK) + i * PMD_SIZE : *start;
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+
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+ /* don't round down the first address */
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+ addr = i ? (*first & PMD_MASK) + i * PMD_SIZE : *first;
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pfn = get_pmd_pfn(pmd[i], vma, addr);
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if (pfn == -1)
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goto next;
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if (!pmd_trans_huge(pmd[i])) {
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- if (arch_has_hw_nonleaf_pmd_young() &&
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- get_cap(LRU_GEN_NONLEAF_YOUNG))
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+ if (arch_has_hw_nonleaf_pmd_young() && get_cap(LRU_GEN_NONLEAF_YOUNG))
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pmdp_test_and_clear_young(vma, addr, pmd + i);
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goto next;
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}
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@@ -4053,12 +4055,11 @@ next:
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arch_leave_lazy_mmu_mode();
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spin_unlock(ptl);
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done:
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- *start = -1;
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- bitmap_zero(bitmap, MIN_LRU_BATCH);
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+ *first = -1;
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}
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#else
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-static void walk_pmd_range_locked(pud_t *pud, unsigned long next, struct vm_area_struct *vma,
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- struct mm_walk *args, unsigned long *bitmap, unsigned long *start)
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+static void walk_pmd_range_locked(pud_t *pud, unsigned long addr, struct vm_area_struct *vma,
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+ struct mm_walk *args, unsigned long *bitmap, unsigned long *first)
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{
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}
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#endif
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@@ -4071,9 +4072,9 @@ static void walk_pmd_range(pud_t *pud, u
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unsigned long next;
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unsigned long addr;
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struct vm_area_struct *vma;
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- unsigned long pos = -1;
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+ unsigned long bitmap[BITS_TO_LONGS(MIN_LRU_BATCH)];
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+ unsigned long first = -1;
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struct lru_gen_mm_walk *walk = args->private;
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- unsigned long bitmap[BITS_TO_LONGS(MIN_LRU_BATCH)] = {};
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VM_WARN_ON_ONCE(pud_leaf(*pud));
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@@ -4115,18 +4116,17 @@ restart:
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if (pfn < pgdat->node_start_pfn || pfn >= pgdat_end_pfn(pgdat))
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continue;
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- walk_pmd_range_locked(pud, addr, vma, args, bitmap, &pos);
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+ walk_pmd_range_locked(pud, addr, vma, args, bitmap, &first);
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continue;
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}
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#endif
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walk->mm_stats[MM_NONLEAF_TOTAL]++;
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- if (arch_has_hw_nonleaf_pmd_young() &&
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- get_cap(LRU_GEN_NONLEAF_YOUNG)) {
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+ if (arch_has_hw_nonleaf_pmd_young() && get_cap(LRU_GEN_NONLEAF_YOUNG)) {
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if (!pmd_young(val))
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continue;
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- walk_pmd_range_locked(pud, addr, vma, args, bitmap, &pos);
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+ walk_pmd_range_locked(pud, addr, vma, args, bitmap, &first);
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}
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if (!walk->force_scan && !test_bloom_filter(walk->lruvec, walk->max_seq, pmd + i))
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@@ -4143,7 +4143,7 @@ restart:
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update_bloom_filter(walk->lruvec, walk->max_seq + 1, pmd + i);
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}
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- walk_pmd_range_locked(pud, -1, vma, args, bitmap, &pos);
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+ walk_pmd_range_locked(pud, -1, vma, args, bitmap, &first);
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if (i < PTRS_PER_PMD && get_next_vma(PUD_MASK, PMD_SIZE, args, &start, &end))
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goto restart;
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