[DRBD-user] Resource is 'Blocked: upper'

Julien Escario julien.escario at altinea.fr
Mon Aug 27 18:15:09 CEST 2018

Le 27/08/2018 à 17:44, Lars Ellenberg a écrit :
> On Mon, Aug 27, 2018 at 05:01:52PM +0200, Julien Escario wrote:
>> Hello,
>> We're stuck in a strange situation. One of our ressources is marked as :
>> volume 0 (/dev/drbd155): UpToDate(normal disk state) Blocked: upper
>> I used drbdtop to get this info because drbdadm hangs.
>> I can also see a drbdsetup process blocked :
>> drbdsetup disk-options 155 --set-defaults --read-balancing=prefer-local
>> --al-extents=6481 --al-updates=no --md-flushes=no
> maybe check /proc/<pid>/stack to see where it blocks.
> Also, what DRBD (kernel) version is this?

# cat /proc/drbd
version: 9.0.12-1 (api:2/proto:86-112)
GIT-hash: 7eb4aef4abbfba8ebb1afbcc30574df74db0063e build by root at vm9, 2018-03-27
Transports (api:16): tcp (9.0.12-1)

# cat /proc/22538/stack
[<ffffffffc0b6dc67>] drbd_al_shrink+0xd7/0x1a0 [drbd]
[<ffffffffc0b85712>] drbd_adm_disk_opts+0x2b2/0x580 [drbd]
[<ffffffff8f028d83>] genl_family_rcv_msg+0x203/0x3f0
[<ffffffff8f028fbc>] genl_rcv_msg+0x4c/0x90
[<ffffffff8f02846c>] netlink_rcv_skb+0xec/0x120
[<ffffffff8f028b68>] genl_rcv+0x28/0x40
[<ffffffff8f027be2>] netlink_unicast+0x192/0x230
[<ffffffff8f027f52>] netlink_sendmsg+0x2d2/0x3c0
[<ffffffff8efcbfde>] sock_sendmsg+0x3e/0x50
[<ffffffff8efcc075>] sock_write_iter+0x85/0xf0
[<ffffffff8ea555c7>] new_sync_write+0xe7/0x140
[<ffffffff8ea55649>] __vfs_write+0x29/0x40
[<ffffffff8ea563b5>] vfs_write+0xb5/0x1a0
[<ffffffff8ea57a75>] SyS_write+0x55/0xc0
[<ffffffff8f2001a1>] entry_SYSCALL_64_fastpath+0x24/0xab
[<ffffffffffffffff>] 0xffffffffffffffff

Doesn't really talk to me ... vfs, network ?

Best regards,

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