On Fri, 2015-07-17 at 16:17 -0700, Kent Overstreet wrote: > On Wed, Jul 15, 2015 at 12:39:36AM -0700, Ming Lin wrote: > > On Wed, Jul 15, 2015 at 12:15 AM, Ming Lin <mlin@xxxxxxxxxx> wrote: > > > On Tue, 2015-07-14 at 23:58 -0700, Kent Overstreet wrote: > > >> Can you strace it? > > > > > > Strange. Now error message changed. > > > > I mean sometimes it showed: > > > > mount: /dev/sdt already mounted or /mnt/ busy > > I have no idea what's going on, it works for me - is there anything unusual > about your setup? what kind of block device is /dev/sdt? is there any chance > there's another process that has it open? maybe try rebooting? It's a regular HDD. I tried rebooting several times. Now I try in qemu-kvm. Only the first time it can be mounted. On host: qemu-img create hdd1.img 20G On guest: it's /dev/vda root@block:~# bcacheadm format -C /dev/vda UUID: 4730ed95-4c57-42db-856c-dbce36085625 Set UUID: e69ef0e0-0344-40d7-a6b1-c23d14745a32 version: 6 nbuckets: 40960 block_size: 1 bucket_size: 1024 nr_in_set: 1 nr_this_dev: 0 first_bucket: 3 root@block:~# mount -t bcache /dev/vda /mnt/ root@block:~# mount |grep bcache /dev/vda on /mnt type bcache (rw,relatime) root@block:~# reboot root@block:~# dmesg |grep -i bcache [ 2.548754] bcache: bch_journal_replay() journal replay done, 1 keys in 1 entries, seq 3 [ 2.636217] bcache: register_cache() registered cache device vda root@block:~# mount -t bcache /dev/vda /mnt/ mount: No such file or directory Now dmesg shows: bcache: bch_open_as_blockdevs() register_cache_set err device already registered -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
