[DRBD-user] disconnecting hangs after ko-count failure

Walter Haidinger walter.haidinger at gmx.at
Tue Jan 22 23:52:39 CET 2008

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

> > > please do
> > > # ps -eo pid,state,wchan:30,cmd | grep -e D -e drbd
> > 
> >   171 S drbd_nl_disconnect             [cqueue/1]
> >  7735 S -                              [drbd0_worker]
> > 13018 D drbd_disconnect                [drbd0_receiver]
> > 21135 S pipe_wait                      grep drbd
> to even start guessing about anything,
> what I'd need is /proc/drbd (not only the first line),
> and the above output, of both nodes,
> when they are in this "hanging" state.

I only have output of one node right now, the other one has been already rebooted. Hope that helps nevertheless.

> cat /proc/drbd
version: 8.0.8 (api:86/proto:86)
GIT-hash: bd3e2c922f95c4fa0dca57a4f8c24bf8b249cc02 build by root at vmhost.private, 2008-01-02 21:11:11
 0: cs:Disconnecting st:Secondary/Unknown ds:UpToDate/Inconsistent C r---
    ns:1360172 nr:0 dw:49554716 dr:1364921 al:25388 bm:25544 lo:0 pe:0 ua:0 ap:0
    resync: used:0/31 hits:679830 misses:89 starving:0 dirty:0 changed:89
    act_log: used:0/19 hits:12363291 misses:26105 starving:3 dirty:716 changed:25388

> also, maybe you can trigger a sysrq shoW-blocked-tasks (or showTasks, if
> your kernel does not have the former), and see if you can figure out
> where exactly the drbd_disconnect sleeps, so we know what exactly it is
> waiting for.

Very good idea! However,  have not used sysrq yet, and Documentation/sysrq.txt doesn't know about showtasks, so how do I do this, i.e. what do I write to /proc/sysrq-trigger?

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