btrfs: reada: bypass adding extent when all zone failed
When failed adding all dev_zones for a reada_extent, the extent
will have no chance to be selected to run, and keep in memory
for ever.
We should bypass this extent to avoid above case.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c
index 27a2fe9..1d00de7 100644
--- a/fs/btrfs/reada.c
+++ b/fs/btrfs/reada.c
@@ -330,6 +330,7 @@
int nzones = 0;
unsigned long index = logical >> PAGE_CACHE_SHIFT;
int dev_replace_is_ongoing;
+ int have_zone = 0;
spin_lock(&fs_info->reada_lock);
re = radix_tree_lookup(&fs_info->reada_tree, index);
@@ -456,10 +457,14 @@
btrfs_dev_replace_unlock(&fs_info->dev_replace);
goto error;
}
+ have_zone = 1;
}
spin_unlock(&fs_info->reada_lock);
btrfs_dev_replace_unlock(&fs_info->dev_replace);
+ if (!have_zone)
+ goto error;
+
btrfs_put_bbio(bbio);
return re;