FAILED: patch "[PATCH] mm/vmscan: fix a bug calling wakeup_kswapd() with a wrong" failed to apply to 5.15-stable tree

The patch below does not apply to the 5.15-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y
git checkout FETCH_HEAD
git cherry-pick -x 2774f256e7c0219e2b0a0894af1c76bdabc4f974
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2024030400-blooper-quaking-0f36@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:

2774f256e7c0 ("mm/vmscan: fix a bug calling wakeup_kswapd() with a wrong zone index") 2ac9e99f3b21 ("mm: migrate: convert numamigrate_isolate_page() to numamigrate_isolate_folio()") f7f9c00dfaff ("mm: change to return bool for isolate_lru_page()")
be2d57563822 ("mm: change to return bool for folio_isolate_lru()")
4a64981dfee9 ("mm/mempolicy: convert migrate_page_add() to migrate_folio_add()") 3dae02bbd07f ("mm/mempolicy: convert queue_pages_pte_range() to queue_folios_pte_range()") de1f5055523e ("mm/mempolicy: convert queue_pages_pmd() to queue_folios_pmd()") 07bb1fbaa2bb ("mm/damon/paddr: convert damon_pa_*() to use a folio") f70da5ee8fe1 ("mm/damon: convert damon_pa_mark_accessed_or_deactivate() to use folios") 07e8c82b5eff ("madvise: convert madvise_cold_or_pageout_pte_range() to use folios") 18250e78f9c7 ("mm/damon/paddr: support DAMOS filters")
fd3b1bc3c86e ("mm/madvise: fix madvise_pageout for private file mappings") 7438899b0b8d ("folio-compat: remove try_to_release_page()")
64ab3195ea07 ("khugepage: replace try_to_release_page() with filemap_release_folio()") ece62684dcfb ("hugetlbfs: convert hugetlb_delete_from_page_cache() to use folios") 241f68859656 ("mm/migrate_device.c: refactor migrate_vma and migrate_deivce_coherent_page()") 16ce101db85d ("mm/memory.c: fix race when faulting a device private page") fa27759af4a6 ("hugetlb: clean up code checking for fault/truncation races") c86272287bc6 ("hugetlb: create remove_inode_single_folio to remove single file folio") 7e1813d48dd3 ("hugetlb: rename remove_huge_page to hugetlb_delete_from_page_cache")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 2774f256e7c0219e2b0a0894af1c76bdabc4f974 Mon Sep 17 00:00:00 2001
From: Byungchul Park <[email protected]>
Date: Fri, 16 Feb 2024 20:15:02 +0900
Subject: [PATCH] mm/vmscan: fix a bug calling wakeup_kswapd() with a wrong
zone index

With numa balancing on, when a numa system is running where a numa node doesn't have its local memory so it has no managed zones, the following oops has been observed. It's because wakeup_kswapd() is called with a wrong zone index, -1. Fixed it by checking the index before calling wakeup_kswapd().

index cc9f2bcd73b4..c27b1f8097d4 100644
@@ -2519,6 +2519,14 @@ static int numamigrate_isolate_folio(pg_data_t *pgdat, struct folio *folio)
 			if (managed_zone(pgdat->node_zones + z))
 				break;
 		}
+
+		/*
+		 * If there are no managed zones, it should not proceed
+		 * further.
+		 */
+		if (z < 0)
+			return 0;
+
 		wakeup_kswapd(pgdat->node_zones + z, 0,
 			      folio_order(folio), ZONE_MOVABLE);
 		return 0;