[DRBD-user] kernel panics when connected

Lars Ellenberg lars.ellenberg at linbit.com
Wed Jul 30 14:39:57 CEST 2014

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

On Tue, Jul 29, 2014 at 12:09:51PM +0200, Bart Coninckx wrote:
> Not sure how the output is supposed to look like, but what I have now
> seems readable and provides quite some info. Does anyone can give me
> pointers on what to look for? Where can one determine what is the
> offending process?

You are using an SCST patched kernel (iscsi_put_page_callback).
Apparently that patch is not compatible with DRBD,
or simply "forgets" to also patch DRBD as appropriate.

You later posted that "disable_sendpage" seems to "improve stability".

It changes timings, and thus also "life times" of page reference counts
within the network stack.  Since the issue seems to be with page
reference counting, that may well "appear" to help.

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

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