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From: Namhyung Kim <namhyung@gmail.com>
To: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>,
	linux-kernel@vger.kernel.org,
	Steven Rostedt <rostedt@goodmis.org>,
	dm-devel@redhat.com
Subject: Re: [PATCH] block: add missing block_bio_complete() tracepoint
Date: Mon, 30 Jan 2012 15:02:19 +0900	[thread overview]
Message-ID: <4F26326B.5010806@gmail.com> (raw)
In-Reply-To: <20120130055459.GJ17211@htj.dyndns.org>

2012-01-30 2:54 PM, Tejun Heo wrote:
> On Mon, Jan 30, 2012 at 02:51:43PM +0900, Namhyung Kim wrote:
>> Hi,
>>
>> 2012-01-30 11:53 AM, Tejun Heo wrote:
>>> Hello,
>>>
>>> On Mon, Jan 30, 2012 at 11:49:43 AM +0900, Namhyung Kim wrote:
>>>> Yes, blktrace will see both of completions for rq and bio's it
>>>> contains from now on, and I thought it's your intention? For the
>>>> bounced bio's, it'll see one more completion per bio.
>>>
>>> Umm... no, blktrace users shouldn't see confusing outputs.  My point
>>> was that we should leave raw tracepoints as raw monitor points so that
>>> they can provide raw data to different users and filter from
>>> blktrace.c so that the existing users aren't disturbed.
>>>
>>
>> That means blktrace should not be changed, and not see duplicated
>> completions for rq based drivers at all?
>
> Yeap
>

I see. I'll prepare the patch soon.

Thanks,
Namhyung

  reply	other threads:[~2012-01-30  6:02 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-01-29  9:41 [PATCH] block: add missing block_bio_complete() tracepoint Namhyung Kim
2012-01-29 19:24 ` Tejun Heo
2012-01-30  1:44   ` Namhyung Kim
2012-01-30  1:47     ` Tejun Heo
2012-01-30  2:22       ` Namhyung Kim
2012-01-30  2:30         ` Tejun Heo
2012-01-30  2:49           ` Namhyung Kim
2012-01-30  2:53             ` Tejun Heo
2012-01-30  5:51               ` Namhyung Kim
2012-01-30  5:54                 ` Tejun Heo
2012-01-30  6:02                   ` Namhyung Kim [this message]
2012-01-30  6:38 ` Namhyung Kim
2012-01-30 17:05   ` Tejun Heo
2012-01-31  6:30     ` Namhyung Kim
2012-01-31 10:39       ` Tejun Heo
2012-02-01  2:18         ` Namhyung Kim

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