]> www.infradead.org Git - users/jedix/linux-maple.git/commit
migrate_pages(): fix failure counting for THP splitting
authorHuang Ying <ying.huang@intel.com>
Wed, 17 Aug 2022 08:14:06 +0000 (16:14 +0800)
committerAndrew Morton <akpm@linux-foundation.org>
Wed, 17 Aug 2022 20:58:39 +0000 (13:58 -0700)
commitac0a679099e9acec8b23efaef1941dc3e1fcf094
tree8e1963de88f6ec0393d975c588f3910ed5d32fea
parent66dc4530ed874ced6fdda73029c5f404853421a4
migrate_pages(): fix failure counting for THP splitting

If THP is failed to be migrated, it may be split and retry.  But after
splitting, the head page will be left in "from" list, although THP
migration failure has been counted already.  If the head page is failed to
be migrated too, the failure will be counted twice incorrectly.  So this
is fixed in this patch via moving the head page of THP after splitting to
"thp_split_pages" too.

Link: https://lkml.kernel.org/r/20220817081408.513338-7-ying.huang@intel.com
Fixes: 5984fabb6e82 ("mm: move_pages: report the number of non-attempted pages")
Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Yang Shi <shy828301@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mm/migrate.c