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

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Message-ID: <CAOS58YOMRF9fssZV8nR1kB+o7qFsti8Kc43pCaX_aekt7sEwYA@mail.gmail.com>
Date:	Wed, 8 Aug 2012 23:30:05 -0700
From:	Tejun Heo <tj@...nel.org>
To:	Kent Overstreet <koverstreet@...gle.com>
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()

Hello,

On Wed, Aug 8, 2012 at 11:06 PM, Kent Overstreet <koverstreet@...gle.com> wrote:
> 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.

Yeah, I was hoping for the comment to note that the protected bits
include the pool index.

Thanks.

-- 
tejun
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