The patch titled
Subject: mm/compaction: remove unnecessary cursor page in isolate_freepages_block
has been added to the -mm mm-unstable branch. Its filename is
mm-compaction-remove-unnecessary-cursor-page-in-isolate_freepages_block.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-compaction-remove-unnecessary-cursor-page-in-isolate_freepages_block.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: Kemeng Shi <shikemeng@xxxxxxxxxxxxxxx>
Subject: mm/compaction: remove unnecessary cursor page in isolate_freepages_block
Date: Thu, 3 Aug 2023 17:49:00 +0800
The cursor is only used for page forward currently. We can simply move
page forward directly to remove unnecessary cursor.
Link: https://lkml.kernel.org/r/20230803094901.2915942-4-shikemeng@xxxxxxxxxxxxxxx
Signed-off-by: Kemeng Shi <shikemeng@xxxxxxxxxxxxxxx>
Reviewed-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Kemeng Shi <shikemeng@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/compaction.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
--- a/mm/compaction.c~mm-compaction-remove-unnecessary-cursor-page-in-isolate_freepages_block
+++ a/mm/compaction.c
@@ -584,7 +584,7 @@ static unsigned long isolate_freepages_b
bool strict)
{
int nr_scanned = 0, total_isolated = 0;
- struct page *cursor;
+ struct page *page;
unsigned long flags = 0;
bool locked = false;
unsigned long blockpfn = *start_pfn;
@@ -594,12 +594,11 @@ static unsigned long isolate_freepages_b
if (strict)
stride = 1;
- cursor = pfn_to_page(blockpfn);
+ page = pfn_to_page(blockpfn);
/* Isolate free pages. */
- for (; blockpfn < end_pfn; blockpfn += stride, cursor += stride) {
+ for (; blockpfn < end_pfn; blockpfn += stride, page += stride) {
int isolated;
- struct page *page = cursor;
/*
* Periodically drop the lock (if held) regardless of its
@@ -624,7 +623,7 @@ static unsigned long isolate_freepages_b
if (likely(order <= MAX_ORDER)) {
blockpfn += (1UL << order) - 1;
- cursor += (1UL << order) - 1;
+ page += (1UL << order) - 1;
nr_scanned += (1UL << order) - 1;
}
goto isolate_fail;
@@ -661,7 +660,7 @@ static unsigned long isolate_freepages_b
}
/* Advance to the end of split page */
blockpfn += isolated - 1;
- cursor += isolated - 1;
+ page += isolated - 1;
continue;
isolate_fail:
_
Patches currently in -mm which might be from shikemeng@xxxxxxxxxxxxxxx are
mm-correct-stale-comment-of-function-check_pte.patch
mm-page_table_check-remove-unused-parameters-in-page_table_check_clear.patch
mm-page_table_check-remove-unused-parameters-in-page_table_check_set.patch
mm-page_table_check-remove-unused-parameter-in-page_table_check_pte_clear.patch
mm-page_table_check-remove-unused-parameter-in-page_table_check_pmd_clear.patch
mm-page_table_check-remove-unused-parameter-in-page_table_check_pud_clear.patch
mm-page_table_check-remove-unused-parameter-in-page_table_check_pte_set.patch
mm-page_table_check-remove-unused-parameter-in-page_table_check_pmd_set.patch
mm-page_table_check-remove-unused-parameter-in-page_table_check_pud_set.patch
mm-page_ext-remove-unused-return-value-of-offline_page_ext.patch
mm-page_ext-remove-rollback-for-untouched-mem_section-in-online_page_ext.patch
mm-page_ext-move-functions-around-for-minor-cleanups-to-page_ext.patch
mm-page_ext-add-common-function-to-get-client-data-from-page_ext.patch
mm-page_ext-use-page_ext_data-helper-in-page_table_check.patch
mm-page_ext-use-page_ext_data-helper-in-page_owner.patch
mm-rmap-correct-stale-comment-of-rmap_walk_anon-and-rmap_walk_file.patch
mm-page_poison-remove-unused-page_exth-from-page_poison.patch
mm-vmstat-remove-unused-page_exth-from-vmstat.patch
mm-page_ext-move-page_ext_operations-definition-under-config_page_extension.patch
mm-compaction-set-compact_cached_free_pfn-correctly-in-update_pageblock_skip.patch
mm-compaction-remove-unnecessary-cursor-page-in-isolate_freepages_block.patch
mm-compaction-remove-unnecessary-else-continue-at-end-of-loop-in-isolate_freepages_block.patch
