The patch titled
Subject: migrate_pages: modify max number of pages to migrate in batch
has been added to the -mm mm-unstable branch. Its filename is
migrate_pages-modify-max-number-of-pages-to-migrate-in-batch.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/migrate_pages-modify-max-number-of-pages-to-migrate-in-batch.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Zhenneng Li <lizhenneng@xxxxxxxxxx>
Subject: migrate_pages: modify max number of pages to migrate in batch
Date: Mon, 24 Jun 2024 12:51:20 +0800
We restrict the number of pages to be migrated to no more than
HPAGE_PMD_NR or NR_MAX_BATCHED_MIGRATION, but in fact, the number of pages
to be migrated may reach 2*HPAGE_PMD_NR-1 or 2
*NR_MAX_BATCHED_MIGRATION-1, it's not in inconsistent with the context.
Please refer to commit 42012e0436d4 ("migrate_pages: restrict number of
pages to migrate in batch").
Link: https://lkml.kernel.org/r/20240624045120.121261-1-lizhenneng@xxxxxxxxxx
Signed-off-by: Zhenneng Li <lizhenneng@xxxxxxxxxx>
Cc: "Huang, Ying" <ying.huang@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/migrate.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/migrate.c~migrate_pages-modify-max-number-of-pages-to-migrate-in-batch
+++ a/mm/migrate.c
@@ -1961,7 +1961,7 @@ again:
break;
}
if (nr_pages >= NR_MAX_BATCHED_MIGRATION)
- list_cut_before(&folios, from, &folio2->lru);
+ list_cut_before(&folios, from, &folio->lru);
else
list_splice_init(from, &folios);
if (mode == MIGRATE_ASYNC)
_
Patches currently in -mm which might be from lizhenneng@xxxxxxxxxx are
migrate_pages-modify-max-number-of-pages-to-migrate-in-batch.patch
