Re: [PATCH v2 0/8] Avoid L2CAP ERTM shutdown hung tasks

[Johan Hedberg <johan.hedberg@gmail.com>]

Hi Dean,

On Thu, Jul 09, 2015, Dean Jenkins wrote:
> Please can you point to me to some details on how to use the l2cap-tester
> tool so that I can attempt to look into this issue.

First of all, please avoid top-posting on this list.

Regarding l2cap-tester, there's really nothing special needed except for
the hci_vhci module and running the tool as root. However, as I pointed
out what was causing this you shouldn't even need l2cap-tester, but just
create an L2CAP socket with any tool. The more important thing is to
have the right config options in the kernel. I've got at least the
following:

CONFIG_LOCKDEP_SUPPORT=y
CONFIG_DEBUG_SPINLOCK=y
CONFIG_DEBUG_LOCK_ALLOC=y
CONFIG_PROVE_LOCKING=y
CONFIG_LOCKDEP=y
CONFIG_DEBUG_MUTEXES=y

I'd guess only the "LOCKDEP" ones are really needed, but not completely
sure about it.

I was kind of half expecting you to already be familiar with
l2cap-tester since you were submitting patches to L2CAP, but I guess
it's never too late :) Either way it'd be good if you could also look
into adding new test cases to the tool that specifically exercise the
code paths that you were fixing.

Johan