Sorry for my English. But my Bcache depends on if I have many Copy files. I have tested it on two computers with me and i have the problem with kernel 3.10.10, 3.10.11,3.10.12,3.11 and 3.11.1. My Bcache-Tools are from git: git clone http://evilpiepirate.org/git/bcache-tools.git cd bcache-tools make make install My Test: ||make-bcache -C /dev/sda4 -B /dev/sdb1 mkfs.ext4 -L Data /dev/bcache0 mkdir x mount /dev/bcache0 x rsync -avr --progress --delete /usr/src ./x/ sync First, rsync copies the files very quickly then to be getting slower, that goes to halt! I give in another console "sync" here, not the command returns. I can take the computer will not reboot with "init 6". Example dmesg output kernel 3.10.12 dmesg | grep bcache [ 4.431850] bcache: bch_journal_replay() journal replay done, 13 keys in 11 entries, seq 6203 [ 4.431975] bcache: register_cache() registered cache device sda4 [ 5.380055] bcache: register_bdev() registered backing device sdb1 [ 5.382439] bcache: bch_cached_dev_attach() Caching sdb1 as bcache0 on set 44f04bd1-328d-4b8d-a971-ebd32197b07c [ 3517.143767] EXT4-fs (bcache0): recovery complete [ 3517.155432] EXT4-fs (bcache0): mounted filesystem with ordered data mode. Opts: (null) dmesg shows me after a certain time: [ 3517.143767] EXT4-fs (bcache0): recovery complete [ 3517.155432] EXT4-fs (bcache0): mounted filesystem with ordered data mode. Opts: (null) [ 3744.242908] EXT4-fs error (device sda1): ext4_iget:4208: inode #32719: comm rsync: bogus i_mode (76640) [ 3744.242916] Aborting journal on device sda1-8. [ 3744.242988] EXT4-fs (sda1): Remounting filesystem read-only [ 3744.259389] EXT4-fs error (device sda1): ext4_lookup:1437: inode #31591: comm rsync: deleted inode referenced: 32720 [ 3782.918890] EXT4-fs error (device sda1): ext4_lookup:1437: inode #659725: comm rsync: deleted inode referenced: 659856 [ 3782.919452] EXT4-fs error (device sda1): ext4_iget:4025: inode #659853: comm rsync: bad extra_isize (35984 != 256) [ 3782.919709] EXT4-fs error (device sda1): ext4_lookup:1437: inode #659725: comm rsync: deleted inode referenced: 659855 [ 3782.919846] EXT4-fs error (device sda1): ext4_iget:4025: inode #659854: comm rsync: bad extra_isize (36368 != 256) [ 3788.408566] EXT4-fs error (device sda1): ext4_iget:4025: inode #669088: comm rsync: bad extra_isize (11415 != 256) [ 3788.410341] EXT4-fs error (device sda1): ext4_iget:4025: inode #669087: comm rsync: bad extra_isize (54310 != 256) [ 3843.252091] INFO: task sync:28098 blocked for more than 120 seconds. [ 3843.252098] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 3843.252101] sync D ffff88011f49d790 0 28098 906 0x00000000 [ 3843.252107] ffff88011f49d790 0000000000000082 ffff88011a8ec140 0000000000044800 [ 3843.252112] 0000000000012ec0 ffff8801128cbfd8 ffff8801128cbfd8 ffff88011f49d790 [ 3843.252116] ffff8801128cbfd8 ffff88011fd12ec0 ffff88011f49d790 ffff8801128cbda0 [ 3843.252120] Call Trace: [ 3843.252130] [<ffffffff810bdffe>] ? __lock_page+0x66/0x66 [ 3843.252137] [<ffffffff8136c0bf>] ? io_schedule+0x56/0x6d [ 3843.252141] [<ffffffff810be005>] ? sleep_on_page+0x7/0xc [ 3843.252145] [<ffffffff8136a504>] ? __wait_on_bit+0x3e/0x75 [ 3843.252149] [<ffffffff810be3c5>] ? find_get_pages_tag+0xe7/0x121 [ 3843.252153] [<ffffffff810be0b9>] ? wait_on_page_bit+0x6e/0x73 [ 3843.252157] [<ffffffff810bda10>] ? test_and_clear_bit+0x4/0x7 [ 3843.252163] [<ffffffff8104fcfc>] ? wake_atomic_t_function+0x21/0x21 [ 3843.252168] [<ffffffff810be770>] ? filemap_fdatawait_range+0x66/0xfe [ 3843.252172] [<ffffffff8136bd5b>] ? __schedule+0x4c5/0x51b [ 3843.252177] [<ffffffff81121142>] ? sync_inodes_sb+0x145/0x191 [ 3843.252182] [<ffffffff81124093>] ? fdatawrite_one_bdev+0xd/0xd [ 3843.252187] [<ffffffff81104a4c>] ? iterate_supers+0x63/0xb5 [ 3843.252191] [<ffffffff811241cc>] ? sys_sync+0x2e/0x81 [ 3843.252197] [<ffffffff81372012>] ? system_call_fastpath+0x16/0x1b -- 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