The patch titled
Subject: revert-mm-skip-cma-pages-when-they-are-not-available-update
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
revert-mm-skip-cma-pages-when-they-are-not-available-update.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/revert-mm-skip-cma-pages-when-they-are-not-available-update.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Usama Arif <usamaarif642@xxxxxxxxx>
Subject: revert-mm-skip-cma-pages-when-they-are-not-available-update
Date: Wed, 21 Aug 2024 20:26:07 +0100
also revert b7108d66318a ("Multi-gen LRU: skip CMA pages when they are not
eligible"), per Johannes
Link: https://lkml.kernel.org/r/9060a32d-b2d7-48c0-8626-1db535653c54@xxxxxxxxx
Link: https://lkml.kernel.org/r/357ac325-4c61-497a-92a3-bdbd230d5ec9@xxxxxxxxx
Fixes: 5da226dbfce3 ("mm: skip CMA pages when they are not available")
Signed-off-by: Usama Arif <usamaarif642@xxxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Bharata B Rao <bharata@xxxxxxx>
Cc: Breno Leitao <leitao@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Yu Zhao <yuzhao@xxxxxxxxxx>
Cc: Zhaoyang Huang <huangzhaoyang@xxxxxxxxx>
Cc: Zhaoyang Huang <zhaoyang.huang@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmscan.c | 21 +--------------------
1 file changed, 1 insertion(+), 20 deletions(-)
--- a/mm/vmscan.c~revert-mm-skip-cma-pages-when-they-are-not-available-update
+++ a/mm/vmscan.c
@@ -4253,25 +4253,6 @@ void lru_gen_soft_reclaim(struct mem_cgr
#endif /* CONFIG_MEMCG */
-#ifdef CONFIG_CMA
-/*
- * It is waste of effort to scan and reclaim CMA pages if it is not available
- * for current allocation context. Kswapd can not be enrolled as it can not
- * distinguish this scenario by using sc->gfp_mask = GFP_KERNEL
- */
-static bool skip_cma(struct folio *folio, struct scan_control *sc)
-{
- return !current_is_kswapd() &&
- gfp_migratetype(sc->gfp_mask) != MIGRATE_MOVABLE &&
- folio_migratetype(folio) == MIGRATE_CMA;
-}
-#else
-static bool skip_cma(struct folio *folio, struct scan_control *sc)
-{
- return false;
-}
-#endif
-
/******************************************************************************
* the eviction
******************************************************************************/
@@ -4319,7 +4300,7 @@ static bool sort_folio(struct lruvec *lr
}
/* ineligible */
- if (zone > sc->reclaim_idx || skip_cma(folio, sc)) {
+ if (zone > sc->reclaim_idx) {
gen = folio_inc_gen(lruvec, folio, false);
list_move_tail(&folio->lru, &lrugen->folios[gen][type][zone]);
return true;
_
Patches currently in -mm which might be from usamaarif642@xxxxxxxxx are
revert-mm-skip-cma-pages-when-they-are-not-available.patch
revert-mm-skip-cma-pages-when-they-are-not-available-update.patch
