Greetings to all!
I'm experimenting bcache with sas disks as backing devices and nvme as
cache. The backing devices are used as ceph osd mount points.
I was able to make them part of ceph cluster and have the ceph mount
points added to fstab using the bcache uuid.
These bcache backing devices are disappearing after rebooting the host
that has these devices. dmesg shows, bcache_allocto blocked and later
bcache-register blocked.
bcache cache device is registered successfully though.
Digged the mailing list and couldn't find consumable information. Did
anyone encounter this problem ? Any thoughts on troubleshooting ..
Appreciate your help!
Here is excerpt from dmesg:
[ 53.752029] bcache: bch_journal_replay() journal replay done, 2173
keys in 153 entries, seq 331031
│
[ 53.752177] bcache: register_cache() registered cache device
nvme0n1p17
│
[ 58.641878] bcache: register_bdev() registered backing device sdj
│
[ 253.701153] INFO: task bcache_allocato:496 blocked for more than
120 seconds.
│
[ 253.953639] bcache_allocato D ffff88085fe16640 0 496 2
0x00000000
│
[ 253.953670] [<ffffffffc01311e3>] bch_bucket_alloc+0x163/0x320
[bcache]
│
[ 253.953682] [<ffffffffc014fa36>] ? bch_crc64+0x36/0x50 [bcache]
│
[ 253.953689] [<ffffffffc0146de4>] bch_prio_write+0x184/0x310
[bcache]
│
[ 253.953693] [<ffffffffc0131019>] bch_allocator_thread+0x3d9/0x440
[bcache]
│
[ 253.953699] [<ffffffffc0130c40>] ? invalidate_buckets+0x920/0x920
[bcache]
│
[ 253.953716] INFO: task bcache-register:525 blocked for more than
120 seconds.
│
[ 254.206187] bcache-register D ffff88085fe16640 0 525 1
0x00000004
│
[ 254.206202] [<ffffffffc01311e3>] bch_bucket_alloc+0x163/0x320
[bcache]
│
[ 254.206208] [<ffffffffc013152c>] __bch_bucket_alloc_set+0xec/0x140
[bcache]
│
[ 254.206213] [<ffffffffc01315ce>] bch_bucket_alloc_set+0x4e/0x70
[bcache]
│
[ 254.206218] [<ffffffffc0145866>] __uuid_write+0x46/0xe0 [bcache]
│
[ 254.206223] [<ffffffffc0146806>] bch_uuid_write+0x16/0x40 [bcache]
│
[ 254.206228] [<ffffffffc0147493>] bch_cached_dev_attach+0x153/0x490
[bcache]
│
[ 254.206249] [<ffffffffc0149645>] register_bcache+0xa25/0x13b0
[bcache]
│
[ 254.206317] INFO: task bcache-register:527 blocked for more than
120 seconds.
│
[ 254.458788] bcache-register D ffff88105f456640 0 527 1
0x00000004
│
[ 254.458812] [<ffffffffc0148e5e>] register_bcache+0x23e/0x13b0
[bcache]
│
[ 254.458832] INFO: task bcache-register:548 blocked for more than
120 seconds.
│
[ 254.711311] bcache-register D ffff88105f456640 0 548 1 0x00000004
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