The patch titled
Subject: mm/migrate: continue to migrate for non-hugetlb folios
has been added to the -mm mm-unstable branch. Its filename is
mm-migrate-continue-to-migrate-for-non-hugetlb-folios.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-migrate-continue-to-migrate-for-non-hugetlb-folios.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: Chen Wandun <chenwandun@xxxxxxxxxx>
Subject: mm/migrate: continue to migrate for non-hugetlb folios
Date: Sun, 29 Jan 2023 11:39:10 +0800
migrate_hugetlbs() returns -ENOMEM when there are not enough hugetlbs,
however there may be free non-hugetlb folios available, so continue to
migrate for non-hugetlb folios.
Nowdays the only negative return value of migrate_hugetlbs is -ENOMEM.
Keep compatibility for coming negative return values instead of ignore
the return value.
Link: https://lkml.kernel.org/r/20230129033910.1327277-1-chenwandun@xxxxxxxxxx
Signed-off-by: Chen Wandun <chenwandun@xxxxxxxxxx>
Reviewed-by: "Huang, Ying" <ying.huang@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/migrate.c~mm-migrate-continue-to-migrate-for-non-hugetlb-folios
+++ a/mm/migrate.c
@@ -1939,7 +1939,8 @@ int migrate_pages(struct list_head *from
rc_gather = migrate_hugetlbs(from, get_new_page, put_new_page, private,
mode, reason, &stats, &ret_folios);
- if (rc_gather < 0)
+ /* There may be free non-hugetlb folios available, continue to migrate. */
+ if (rc_gather < 0 && rc_gather != -ENOMEM)
goto out;
again:
nr_pages = 0;
_
Patches currently in -mm which might be from chenwandun@xxxxxxxxxx are
mm-migrate-continue-to-migrate-for-non-hugetlb-folios.patch
