[DRBD-user] Kernel crash when doing mount --bind

Lars Ellenberg Lars.Ellenberg at linbit.com
Thu Feb 26 09:14:32 CET 2004


/ 2004-02-25 23:33:52 +0000
\ Mark Hellman:
> I suffered several kernel crashes while using DRBD. It seems I have
> identified the cause.
> 
> While the Primary host is SyncingAll to the Secondary host, the user
> is able to mount the /dev/nb0.  But if I mount /dev/nb0 at
> /mnt/drbd_mountpoint/, and afterwards I run:
>      mount --bind /mnt/drbd_mountpoint/somedir /etc/somedir
> I get a kernel freeze or crash (on the Primary host).

"freeze or crash": can you be more specific on the symptoms?
do you get any kernel messages that may be related to it?

> This only happens while a SyncingAll is being performed. When it is
> finished, "mount --bind" works fine.

[other mail]:
> Actually, it also crashes when the sync is done. I still haven't
> identified a pattern...

Ok, so your kernel "freezes" "sometimes" when you do a
mount --bind like above.

This is not the best starting point for debugging...

> I am running SuSE 9.0, 2.4.21-166 kernel, and DRBD 0.6.11 on top of
> LVM (sitting on top of ReiserFS).

ReiserFS
DRBD
LVM, right?

Does current CVS DRBD help? (you never know)

> Now I decided to change the physical device filesystem from ReiserFS
> to JFS.  I will post some news if I notice something revelant.

Thanks.

	Lars Ellenberg



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