linux-kernel - RE: [PATCH v2 0/3]

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Message-ID: <000701d667c2$0782fe70$1688fb50$@codeaurora.org>
Date:   Sat, 1 Aug 2020 10:40:03 +0530
From:   "Rakesh Pillai" <pillair@...eaurora.org>
To:     "'Florian Fainelli'" <f.fainelli@...il.com>,
        <ath10k@...ts.infradead.org>
Cc:     <linux-wireless@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <kvalo@...eaurora.org>, <davem@...emloft.net>, <kuba@...nel.org>,
        <netdev@...r.kernel.org>
Subject: RE: [PATCH v2 0/3]



> -----Original Message-----
> From: Florian Fainelli <f.fainelli@...il.com>
> Sent: Saturday, August 1, 2020 12:17 AM
> To: Rakesh Pillai <pillair@...eaurora.org>; ath10k@...ts.infradead.org
> Cc: linux-wireless@...r.kernel.org; linux-kernel@...r.kernel.org;
> kvalo@...eaurora.org; davem@...emloft.net; kuba@...nel.org;
> netdev@...r.kernel.org
> Subject: Re: [PATCH v2 0/3]
> 
> On 7/31/20 11:27 AM, Rakesh Pillai wrote:
> > The history recording will be compiled only if
> > ATH10K_DEBUG is enabled, and also enabled via
> > the module parameter. Once the history recording
> > is enabled via module parameter, it can be enabled
> > or disabled runtime via debugfs.
> 
> Why not use trace prints and retrieving them via the function tracer?
> This seems very ad-hoc.

Tracing needs to be enabled to capture the events.
But these events can be turned on in some kind of a debug build and capture the history to help us debug in case there is a crash.
It wont even allocate memory if not enabled via module parameter.

> 
> >
> > ---
> > Changes from v1:
> > - Add module param and debugfs to enable/disable history recording.
> >
> > Rakesh Pillai (3):
> >   ath10k: Add history for tracking certain events
> >   ath10k: Add module param to enable history
> >   ath10k: Add debugfs support to enable event history
> >
> >  drivers/net/wireless/ath/ath10k/ce.c      |   1 +
> >  drivers/net/wireless/ath/ath10k/core.c    |   3 +
> >  drivers/net/wireless/ath/ath10k/core.h    |  82 ++++++++++++
> >  drivers/net/wireless/ath/ath10k/debug.c   | 207
> ++++++++++++++++++++++++++++++
> >  drivers/net/wireless/ath/ath10k/debug.h   |  75 +++++++++++
> >  drivers/net/wireless/ath/ath10k/snoc.c    |  15 ++-
> >  drivers/net/wireless/ath/ath10k/wmi-tlv.c |   1 +
> >  drivers/net/wireless/ath/ath10k/wmi.c     |  10 ++
> >  8 files changed, 393 insertions(+), 1 deletion(-)
> >
> 
> 
> --
> Florian