linux-kernel - Re: How do I get mac80211 debugfs?

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Date:	Tue, 2 Oct 2012 08:48:07 +0200
From:	Rami Rosen <roszenrami@...il.com>
To:	Kevin Cruz <skate_ops@...oo.com>
Cc:	Johannes Berg <johannes@...solutions.net>,
	Intel Wireless <ilw@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>
Subject: Re: How do I get mac80211 debugfs?

Hi,

Could it be that debugfs is not mounted on your filesystem ?

In case
mount | grep debugfs
returns nothing,
you can run:

mount -t debugfs none_debugs /sys/kernel/debug
and try again.

Also make sure that
CONFIG_MAC80211_DEBUGFS is set

location is:
    -> Networking support (NET [=y])                                    │
        -> Wireless (WIRELESS [=y])

Regards,
Rami Rosen


On Tue, Oct 2, 2012 at 1:06 AM, Kevin Cruz <skate_ops@...oo.com> wrote:
> Hey Johannes,
>     None of this should be too much of an effort for me. Thankfully I
> don't find terminals to be daunting.
>
>> Yeah ... we saw this in the lab at some point, but somehow we couldn't
>> reproduce it again later. The issue is that we stop the queues, and
>> never restart them, and if it's the same issue then it's definitely the
>> driver's fault.
>
>> To confirm, when you get this, can you please do
>
>> sudo cat /sys/kernel/debug/ieee80211/phy*/queues
>
>> (assuming you have mac80211 debugfs compiled)
>
> So I tried that but all I got back was:
>
>     cat: /sys/kernel/debug/ieee80211/phy*/queues: No such file or directory
>
> so I'm assuming it's because I must not have mac80211 debugfs.  So how
> do I get it?
>
> Thanks, Kevin
>
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