[DRBD-user] LVM crash maybe due to a drbd issue

Lars Ellenberg lars.ellenberg at linbit.com
Mon Dec 7 22:07:28 CET 2009

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

On Mon, Dec 07, 2009 at 05:40:18PM +0100, Maxence DUNNEWIND wrote:
> Hi,
> I'm using drbd with lv LVM. The layout is : 
> drbd -> lv -> vg -> pv . I'm trying to do a vgchange -ay on the underlying lv,
> which is hanging and use 50% of a cpu. An echo w > /proc/sysrq-trigger gives me
> an interesting thing : 


> In the second stack trace, I can see a call to drbd_make_request_26, then to
> inc_ap_bio which seems to be blocked.

So. Something is doing an uninteruptible sleep in inc_ap_bio.
That per se is no cause of concern.

> Anyway, the drbddevice using this lv is down, so it shouldn't block the lvchange
> (I checked with drbdsetup /dev/drbdXX show, only the syncer part is shown).

care to _show_ us?
/proc/drbd, for example, or the LVM config, or the drbd config,
or the overall setup, or what has been suspended when ...

> If someone has any informations about this bug ? Should I report it  (I will
> also mail it on lvm mailing list).

show us some logs?
tell us which _version_ you use?
and the like...

: Lars Ellenberg
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com

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