Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 87BF72172D
Date:   Mon, 5 Feb 2018 11:57:16 -0500
From:   Steven Rostedt <rostedt@goodmis.org>
To:     Lina Iyer <ilina@codeaurora.org>
Cc:     Thomas Gleixner <tglx@linutronix.de>,
        Jason Cooper <jason@lakedaemon.net>,
        Marc Zyngier <marc.zyngier@arm.com>,
        LKML <linux-kernel@vger.kernel.org>,
        linux-arm-msm@vger.kernel.org, sboyd@codeaurora.org,
        rnayak@codeaurora.org, asathyak@codeaurora.org,
        Greg KH <gregkh@linuxfoundation.org>
Subject: Re: [PATCH RFC v2 3/3] drivers: irqchip: pdc: log PDC info in
 FTRACE
Message-ID: <20180205115716.61e0b881@gandalf.local.home>
In-Reply-To: <20180205151846.GA13552@codeaurora.org>
References: <20180202142200.6229-1-ilina@codeaurora.org>
        <20180202142200.6229-4-ilina@codeaurora.org>
        <alpine.DEB.2.21.1802021652100.1472@nanos.tec.linutronix.de>
        <20180202230232.GB15464@codeaurora.org>
        <20180205151846.GA13552@codeaurora.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Mon, 5 Feb 2018 15:18:46 +0000
Lina Iyer <ilina@codeaurora.org> wrote:

> >Some product configurations disable debugfs. I will ask around if this
> >can be dropped.
> >  
> Memory dumps after a crash have support for FTRACE and it helps greatly
> on production issues. Hence the preference for FTRACE support.

Note, ftrace no longer depends on debugfs. It has its own tracefs file
system:

 # mount -t tracefs nodev /sys/kernel/tracing

-- Steve