linux-kernel - Re: [PATCHv2] tracing/events: Add bounce tracing to swiotbl

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Date:	Wed, 25 Sep 2013 14:26:40 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc:	Zoltan Kiss <zoltan.kiss@...rix.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	xen-devel@...ts.xensource.com,
	virtualization@...ts.linux-foundation.org
Subject: Re: [PATCHv2] tracing/events: Add bounce tracing to swiotbl

On Wed, 25 Sep 2013 13:56:49 -0400
Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> wrote:

> .. snip..
> > >+	TP_printk("dev_name: %s dma_mask=%llx dev_addr=%llx "
> > >+		"size=%zu swiotlb_force=%x",
> > >+		__get_str(dev_name),
> > >+		__entry->dma_mask,
> > >+		(unsigned long long)__entry->dev_addr,
> > >+		__entry->size,
> > >+		__entry->swiotlb_force)
> 
> Would it make sense to do something like this:
> 
> 		__entry->swiotlb_force ? "swiotlb_force" : "")

I think that's fine. I do believe that the libtraceevents can parse the
"?:" syntax.

-- Steve
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