linux-kernel - Re: [PATCH RESEND 9/9] block, trace: implement ioblame

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Message-ID: <CAOS58YNSn079KusXuEYf7agyWgMyaZahp7+4rWRFQz_G3k8CjQ@mail.gmail.com>
Date:	Wed, 11 Jan 2012 17:37:35 -0800
From:	Tejun Heo <tj@...nel.org>
To:	Namhyung Kim <namhyung.kim@....com>
Cc:	Namhyung Kim <namhyung@...il.com>, axboe@...nel.dk,
	mingo@...hat.com, rostedt@...dmis.org, fweisbec@...il.com,
	teravest@...gle.com, slavapestov@...gle.com, ctalbott@...gle.com,
	dhsharp@...gle.com, linux-kernel@...r.kernel.org,
	winget@...gle.com, Chanho Park <chanho61.park@...sung.com>
Subject: Re: [PATCH RESEND 9/9] block, trace: implement ioblame - IO tracer
 with origin tracking

Hello,

On Wed, Jan 11, 2012 at 5:35 PM, Namhyung Kim <namhyung.kim@....com> wrote:
> Why do we need to trigger the TP for existing ones as we keep each entry at
> its creation? Maybe I'm missing something?

If a userland program starts to watch the TP after some intents are
created, how is it gonna find out the existing ones?

-- 
tejun
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