linux-kernel - Re: [PATCH v2 2/2] blktrace: add FLUSH/FUA support

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Message-ID: <x497h6ls781.fsf@segfault.boston.devel.redhat.com>
Date:	Wed, 10 Aug 2011 09:53:50 -0400
From:	Jeff Moyer <jmoyer@...hat.com>
To:	Namhyung Kim <namhyung@...il.com>
Cc:	Jens Axboe <jaxboe@...ionio.com>, Christoph Hellwig <hch@....de>,
	linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH v2 2/2] blktrace: add FLUSH/FUA support

Namhyung Kim <namhyung@...il.com> writes:

> Add FLUSH/FUA support to blktrace. As FLUSH precedes WRITE and/or
> FUA follows WRITE, use the same 'F' flag for both cases and
> distinguish them by their (relative) position. The end results
> look like (other flags might be shown also):
>
>  - WRITE:            W
>  - WRITE_FLUSH:      FW
>  - WRITE_FUA:        WF
>  - WRITE_FLUSH_FUA:  FWF

I was hoping we'd go with Jens' suggestion of relacing W with F for flush,
and have FUA appear after that.  However, I can live with this, so if
others like it, it's fine by me.

Thanks for doing this, Namhyung!

Reviewed-by: Jeff Moyer <jmoyer@...hat.com>
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