ACK: [SRU precise trusty utopic] LP#1432837 -- HPWDT watchdog module leads to panics

Brad Figg brad.figg at
Tue Mar 17 14:30:44 UTC 2015

On Tue, Mar 17, 2015 at 02:19:36PM +0000, Andy Whitcroft wrote:
> We have been seeing random crashs from various HP systems, this has
> been tracked to loading of the hpwdt watchdog modules.  Basically these
> modules are a loaded gun and unless you know exactly what you are doing
> you are likely to take off your own head.  For this reason we already
> blacklist "all" of these modules in kmod/module-in-tools blacklists.
> Unfortuantly these have not been kept in sync with the kernel leading to
> the module loading.
> To avoid this going forward simply generate a complete list from
> the kernel watchdogs/*.ko which we built.  This will be dumped into
> /lib/modprobe.d/blacklist-<kabi>.conf which will effectivly leave the
> installed system with the union of blacklists for all installed kernels.
> Longer term we are going to engage with upstream to get something like
> /lib/modules/`uname -r`/modprobe.d added to the config path so that we
> can have just this versions active at any point.
> Following this email are two patches, one for precise and one for
> trusty/utopic.  Each is the same payload, they only differ in context.
> Proposing for SRU to precise, trusty and utopic.  This has already been
> applied to vivid.
> -- 
> kernel-team mailing list
> kernel-team at

Looks good.

Brad Figg brad.figg at

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