Hi again!
I've got brain fade at this moment. I'd like to create and mount
bcachefs and I can't do that.
bcache-tools are on "dev" branch at
f2e0c203096ddba72826206f51a3089092bd48dc. I try to create filesystem
without any cache. I think that I should prepare backing device, I'm
doing:
# ./bcache format --meta_replicas=2 --compression_type=gzip -B /dev/sdd1
UUID: 4218cfd3-2138-4bba-af89-c783d6b4d21a
version: 1
block_size: 1
data_offset: 16
When I try to mount I'm getting in kernel.log:
bcache: bch_open_as_blockdevs() register_cache_set err attempting to
register backing device
Hmm, let me try with "-C".
# mount /dev/sdd1 /mnt/test/
and it hanged. In kernel log I see:
[ 754.888439] bcache: bch_open_as_blockdevs() register_cache_set err
attempting to register backing device
[ 1285.990485] bcache (sdd1): initializing new filesystem
[ 1440.320042] INFO: task mount:2655 blocked for more than 120 seconds.
[ 1440.320048] Not tainted 4.7.0+ #1
[ 1440.320050] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[ 1440.320052] mount D ffff880037a77b40 0 2655 2234
0x00000000
[ 1440.320058] ffff880037a77b40 ffffffff8180b4c0 ffff88003770b500
ffff880037a77b30
[ 1440.320063] ffff880037a78000 fffffffffffffff5 ffff880021310000
ffff880037a77c20
[ 1440.320068] 0000000000000000 ffff880037a77b58 ffffffff814672a0
ffff88003770b500
[ 1440.320072] Call Trace:
[ 1440.320081] [<ffffffff814672a0>] schedule+0x30/0x80
[ 1440.320120] [<ffffffffc02d5255>] __closure_sync+0x55/0xe00 [bcache]
[ 1440.320141] [<ffffffffc029c430>] bch_btree_root_alloc+0xe0/0xf0
[bcache]
[ 1440.320162] [<ffffffffc02a1620>] ? bch_io_clock_init+0x90/0x90
[bcache]
[ 1440.320185] [<ffffffffc02c68d7>] run_cache_set+0x717/0x880 [bcache]
[ 1440.320207] [<ffffffffc02bb855>] ? bch_scan_keylist_init+0x95/0xa0
[bcache]
[ 1440.320230] [<ffffffffc02c4e1c>] ? cache_alloc+0x90c/0x920 [bcache]
[ 1440.320252] [<ffffffffc02c7462>] bch_register_cache_set+0x272/0x2e0
[bcache]
[ 1440.320274] [<ffffffffc02aaeb5>] bch_mount+0x2c5/0x490 [bcache]
[ 1440.320280] [<ffffffff8116336f>] mount_fs+0xf/0x90
[ 1440.320285] [<ffffffff8117d362>] vfs_kern_mount+0x62/0x100
[ 1440.320288] [<ffffffff8117f649>] do_mount+0x1e9/0xd10
[ 1440.320292] [<ffffffff811598cc>] ? __kmalloc_track_caller+0x2c/0x170
[ 1440.320297] [<ffffffff8112566d>] ? memdup_user+0x3d/0x70
[ 1440.320300] [<ffffffff811804a0>] SyS_mount+0x90/0xd0
[ 1440.320304] [<ffffffff8146ae9f>] entry_SYSCALL_64_fastpath+0x17/0x93
[ 1560.320042] INFO: task mount:2655 blocked for more than 120 seconds.
[ 1560.320048] Not tainted 4.7.0+ #1
[ 1560.320050] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[ 1560.320053] mount D ffff880037a77b40 0 2655 2234
0x00000000
[ 1560.320059] ffff880037a77b40 ffffffff8180b4c0 ffff88003770b500
ffff880037a77b30
[ 1560.320064] ffff880037a78000 fffffffffffffff5 ffff880021310000
ffff880037a77c20
[ 1560.320068] 0000000000000000 ffff880037a77b58 ffffffff814672a0
ffff88003770b500
[ 1560.320072] Call Trace:
[ 1560.320081] [<ffffffff814672a0>] schedule+0x30/0x80
[ 1560.320118] [<ffffffffc02d5255>] __closure_sync+0x55/0xe00 [bcache]
[ 1560.320139] [<ffffffffc029c430>] bch_btree_root_alloc+0xe0/0xf0
[bcache]
[ 1560.320160] [<ffffffffc02a1620>] ? bch_io_clock_init+0x90/0x90
[bcache]
[ 1560.320183] [<ffffffffc02c68d7>] run_cache_set+0x717/0x880 [bcache]
[ 1560.320205] [<ffffffffc02bb855>] ? bch_scan_keylist_init+0x95/0xa0
[bcache]
[ 1560.320228] [<ffffffffc02c4e1c>] ? cache_alloc+0x90c/0x920 [bcache]
[ 1560.320250] [<ffffffffc02c7462>] bch_register_cache_set+0x272/0x2e0
[bcache]
[ 1560.320272] [<ffffffffc02aaeb5>] bch_mount+0x2c5/0x490 [bcache]
[ 1560.320277] [<ffffffff8116336f>] mount_fs+0xf/0x90
[ 1560.320282] [<ffffffff8117d362>] vfs_kern_mount+0x62/0x100
[ 1560.320285] [<ffffffff8117f649>] do_mount+0x1e9/0xd10
[ 1560.320290] [<ffffffff811598cc>] ? __kmalloc_track_caller+0x2c/0x170
[ 1560.320294] [<ffffffff8112566d>] ? memdup_user+0x3d/0x70
[ 1560.320297] [<ffffffff811804a0>] SyS_mount+0x90/0xd0
[ 1560.320301] [<ffffffff8146ae9f>] entry_SYSCALL_64_fastpath+0x17/0x93
Am I doing something wrong?
Kernel is at commit 885262cd16cc8a0c312f914e25227954cd964c8d.
Second issue is in help displayed by bcache:
# ./bcache format --help
Usage: bcache format [OPTION]... <list of devices>
Create a new bcache volume from one or more devices
Options:
-C, --cache=dev Format a cache device
-B, --bdev=dev Format a backing device
[...]
-v, --version=# superblock version
-q, --quiet reduce output to errors only
-v, --verbose increase output to include informational
messages
--help display this help and exit
--version output version information and exit
What "-v" does? Increases verbosity or allows to set superblock version?
What "--version" does? Displays info about version of tools or allow to
set superblock version?
Thanks,
Marcin.
--
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
