linux-kernel - Re: [RESEND PATCH v1 1/2] trace: events: scsi: Add tag in SCSI trace events

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Message-ID: <4cdc179e652f8e2b2d7a069029101224779522a5.camel@wdc.com>
Date:   Mon, 16 Apr 2018 21:30:54 +0000
From:   Bart Van Assche <Bart.VanAssche@....com>
To:     "rostedt@...dmis.org" <rostedt@...dmis.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "beanhuo@...ron.com" <beanhuo@...ron.com>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "axboe@...nel.dk" <axboe@...nel.dk>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "mingo@...had.com" <mingo@...had.com>,
        "rajatja@...gle.com" <rajatja@...gle.com>,
        "jejb@...ux.vnet.ibm.com" <jejb@...ux.vnet.ibm.com>
Subject: Re: [RESEND PATCH v1 1/2] trace: events: scsi: Add tag in SCSI trace
 events

On Mon, 2018-04-16 at 17:24 -0400, Steven Rostedt wrote:
> On Mon, 16 Apr 2018 20:49:12 +0000
> Bart Van Assche <Bart.VanAssche@....com> wrote:
> 
> > Which tools process these strings? Has it been verified whether or not
> > the tools that process these strings still work fine with this patch
> > applied?
> 
> Ideally, tools shouldn't process trace event strings, but I'm sure some
> do. :-/
> 
> Getting libtraceevent out as a library is a high priority of mine, and
> hopefully I should get something out in a couple of months.
> 
> Ideally, tools should parse the raw data and then new fields will not
> affect them.

Hello Steve,

The tool I'm most concerned about is blktrace. I'm not sure though how this
tool receives event data from the block layer core.

Thanks,

Bart.