This patch adds more error message for attaching cached device, this is helpful to debug code failure during bache device start up.
Signed-off-by: Coly Li <[email protected]> --- drivers/md/bcache/super.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 1fa3f4e26d02..cf5673af3143 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -1169,6 +1169,8 @@ int bch_cached_dev_attach(struct cached_dev *dc, struct cache_set *c, down_write(&dc->writeback_lock); if (bch_cached_dev_writeback_start(dc)) { up_write(&dc->writeback_lock); + pr_err("Couldn't start writeback facilities for %s", + dc->disk.disk->disk_name); return -ENOMEM; } @@ -1182,6 +1184,8 @@ int bch_cached_dev_attach(struct cached_dev *dc, struct cache_set *c, ret = bch_cached_dev_run(dc); if (ret && (ret != -EBUSY)) { up_write(&dc->writeback_lock); + pr_err("Couldn't run cached device %s", + dc->backing_dev_name); return ret; } -- 2.16.4
