linux-kernel - Re: [PATCH] block: introduce block_rq

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Message-ID: <CAM_iQpX6vGB5hczhJDOCY-Z-8At+rYEAqexryXZd_Tnd8km3Xw@mail.gmail.com>
Date:   Mon, 20 Jan 2020 14:25:33 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     LKML <linux-kernel@...r.kernel.org>, linux-block@...r.kernel.org,
        Jens Axboe <axboe@...nel.dk>
Subject: Re: [PATCH] block: introduce block_rq_error tracepoint

On Mon, Jan 20, 2020 at 10:28 AM Steven Rostedt <rostedt@...dmis.org> wrote:
> The ring buffer will hold a pointer to a location that may no longer
> exist, and cause a fault when read. Also, this makes the user space
> utilities trace-cmd and perf useless to know what the name is, as they
> read the raw ring buffer data directly.

Yeah, my bad, I will send an updated patch.

Thanks.