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| author | Miaohe Lin <linmiaohe@huawei.com> | 2022-05-19 20:50:30 +0800 |
|---|---|---|
| committer | akpm <akpm@linux-foundation.org> | 2022-05-27 09:33:46 -0700 |
| commit | ba6851b45d2d5b07436d8fc43451bad354dc4884 (patch) | |
| tree | 6aa8db1620d0a00e0ea4553f45c5f0b21e8f3c2d /mm/madvise.c | |
| parent | 6cec2b95dadf77cdc1256fae1c5dfd4a2b467e61 (diff) | |
| download | lwn-ba6851b45d2d5b07436d8fc43451bad354dc4884.tar.gz lwn-ba6851b45d2d5b07436d8fc43451bad354dc4884.zip | |
mm: filter out swapin error entry in shmem mapping
There might be swapin error entries in shmem mapping. Filter them out to
avoid "Bad swap file entry" complaint.
Link: https://lkml.kernel.org/r/20220519125030.21486-6-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: NeilBrown <neilb@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/madvise.c')
| -rw-r--r-- | mm/madvise.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/mm/madvise.c b/mm/madvise.c index 5f4537511532..d7b4f2602949 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -248,10 +248,13 @@ static void force_shm_swapin_readahead(struct vm_area_struct *vma, if (!xa_is_value(page)) continue; + swap = radix_to_swp_entry(page); + /* There might be swapin error entries in shmem mapping. */ + if (non_swap_entry(swap)) + continue; xas_pause(&xas); rcu_read_unlock(); - swap = radix_to_swp_entry(page); page = read_swap_cache_async(swap, GFP_HIGHUSER_MOVABLE, NULL, 0, false, &splug); if (page) |