diff options
| author | Miaohe Lin <linmiaohe@huawei.com> | 2021-11-05 23:42:16 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-11-06 23:30:40 +0300 |
| commit | e1d8c966dbf11afcac1d115f3fca5a29060bba18 (patch) | |
| tree | 480d4c4b48b1854b7b08cb0411d30b34daf01098 /mm/debug_page_ref.c | |
| parent | ad0ce23ed099492d7ed1f87cd8cf39a68b9f20a0 (diff) | |
| download | linux-e1d8c966dbf11afcac1d115f3fca5a29060bba18.tar.xz | |
mm/page_isolation: fix potential missing call to unset_migratetype_isolate()
In start_isolate_page_range() undo path, pfn_to_online_page() just
checks the first pfn in a pageblock while __first_valid_page() will
traverse the pageblock until the first online pfn is found. So we may
miss the call to unset_migratetype_isolate() in undo path and pages will
remain isolated unexpectedly.
Fix this by calling undo_isolate_page_range() and this will also help to
simplify the code further. Note we shouldn't ever trigger it because
MAX_ORDER-1 aligned pfn ranges shouldn't contain memory holes now.
Link: https://lkml.kernel.org/r/20210914114348.15569-1-linmiaohe@huawei.com
Fixes: 2ce13640b3f4 ("mm: __first_valid_page skip over offline pages")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/debug_page_ref.c')
0 files changed, 0 insertions, 0 deletions