The quilt patch titled
Subject: mm/compaction: remove unnecessary cursor page in isolate_freepages_block
has been removed from the -mm tree. Its filename was
mm-compaction-remove-unnecessary-cursor-page-in-isolate_freepages_block.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
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
@@ -589,7 +589,7 @@ 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;
@@ -599,12 +599,11 @@ 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
@@ -629,7 +628,7 @@ 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;
@@ -666,7 +665,7 @@ 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
