linux-kernel - Re: [PATCH v5 03/12] block: Add bio

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Message-ID: <20120809060640.GA9088@dhcp-172-18-216-138.mtv.corp.google.com>
Date:	Thu, 9 Aug 2012 02:06:40 -0400
From:	Kent Overstreet <koverstreet@...gle.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	linux-bcache@...r.kernel.org, linux-kernel@...r.kernel.org,
	dm-devel@...hat.com, axboe@...nel.dk, agk@...hat.com,
	neilb@...e.de, drbd-dev@...ts.linbit.com, vgoyal@...hat.com,
	mpatocka@...hat.com, sage@...dream.net, yehuda@...newdream.net
Subject: Re: [PATCH v5 03/12] block: Add bio_reset()

On Wed, Aug 08, 2012 at 11:00:19PM -0700, Tejun Heo wrote:
> Anyways, understood.  Can you *please* put some comment what bits are
> being preserved across reset then?  Things like this aren't obvious at
> all and need ample explanation.

I did, in the header:

#define BIO_RESET_BITS	12	/* Flags starting here get preserved by
bio_reset() */

Where the rest of the flags are defined, and near where BIO_RESET_BYTES
are defined.
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