Hi Shiva, What kernel version? Also, see if you can paste the trace without wrapping and include the whole backtrace including kernel version and line numbers if any. -- Eric Wheeler On Fri, 17 Feb 2017, shiva rkreddy wrote: > 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 > -- > 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 >
