The buffer_migrate_folio_norefs() should avoid holding the spin lock
held in order to ensure we can support large folios. The prior commit
"fs/buffer: avoid races with folio migrations on __find_get_block_slow()"
ripped out the only rationale for having the atomic context, so we can
remove the spin lock call now.
Signed-off-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>
---
mm/migrate.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/mm/migrate.c b/mm/migrate.c
index 9d6f59cf77f8..439aaa610104 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -861,12 +861,12 @@ static int __buffer_migrate_folio(struct address_space *mapping,
}
bh = bh->b_this_page;
} while (bh != head);
+ spin_unlock(&mapping->i_private_lock);
if (busy) {
if (invalidated) {
rc = -EAGAIN;
goto unlock_buffers;
}
- spin_unlock(&mapping->i_private_lock);
invalidate_bh_lrus();
invalidated = true;
goto recheck_buffers;
@@ -884,8 +884,6 @@ static int __buffer_migrate_folio(struct address_space *mapping,
} while (bh != head);
unlock_buffers:
- if (check_refs)
- spin_unlock(&mapping->i_private_lock);
bh = head;
do {
unlock_buffer(bh);
--
2.47.2
