The quilt patch titled
Subject: mm/page_alloc: remove track of active PCP lists range in bulk free
has been removed from the -mm tree. Its filename was
mm-page_alloc-remove-track-of-active-pcp-lists-range-in-bulk-free.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/page_alloc: remove track of active PCP lists range in bulk free
Date: Wed, 9 Aug 2023 18:07:53 +0800
Patch series "Two minor cleanups for pcp list in page_alloc".
There are two minor cleanups for pcp list in page_alloc. More details
can be found in respective patches.
This patch (of 2):
After commit fd56eef258a17 ("mm/page_alloc: simplify how many pages are
selected per pcp list during bulk free"), we will drain all pages in
selected pcp list. And we ensured passed count is < pcp->count. Then,
the search will finish before wrap-around and track of active PCP lists
range intended for wrap-around case is no longer needed.
Link: https://lkml.kernel.org/r/20230809100754.3094517-1-shikemeng@xxxxxxxxxxxxxxx
Link: https://lkml.kernel.org/r/20230809100754.3094517-2-shikemeng@xxxxxxxxxxxxxxx
Signed-off-by: Kemeng Shi <shikemeng@xxxxxxxxxxxxxxx>
Cc: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 15 +++------------
1 file changed, 3 insertions(+), 12 deletions(-)
--- a/mm/page_alloc.c~mm-page_alloc-remove-track-of-active-pcp-lists-range-in-bulk-free
+++ a/mm/page_alloc.c
@@ -1207,8 +1207,6 @@ static void free_pcppages_bulk(struct zo
int pindex)
{
unsigned long flags;
- int min_pindex = 0;
- int max_pindex = NR_PCP_LISTS - 1;
unsigned int order;
bool isolated_pageblocks;
struct page *page;
@@ -1231,17 +1229,10 @@ static void free_pcppages_bulk(struct zo
/* Remove pages from lists in a round-robin fashion. */
do {
- if (++pindex > max_pindex)
- pindex = min_pindex;
+ if (++pindex > NR_PCP_LISTS - 1)
+ pindex = 0;
list = &pcp->lists[pindex];
- if (!list_empty(list))
- break;
-
- if (pindex == max_pindex)
- max_pindex--;
- if (pindex == min_pindex)
- min_pindex++;
- } while (1);
+ } while (list_empty(list));
order = pindex_to_order(pindex);
nr_pages = 1 << order;
_
Patches currently in -mm which might be from shikemeng@xxxxxxxxxxxxxxx are
