linux-kernel - Re: [PATCH v2 01/26] block: Convert integrity to bvec_alloc

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Message-ID: <20121019203606.GU13370@google.com>
Date:	Fri, 19 Oct 2012 13:36:06 -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, neilb@...e.de,
	"Martin K. Petersen" <martin.petersen@...cle.com>
Subject: Re: [PATCH v2 01/26] block: Convert integrity to bvec_alloc_bs(),
 and a bugfix

On Fri, Oct 19, 2012 at 01:34:21PM -0700, Tejun Heo wrote:
> On Mon, Oct 15, 2012 at 01:09:04PM -0700, Kent Overstreet wrote:
> > This adds a pointer to the bvec array to struct bio_integrity_payload,
> > instead of the bvecs always being inline; then the bvecs are allocated
> > with bvec_alloc_bs().
> > 
> > This is needed eventually for immutable bio vecs - immutable bvecs
> > aren't useful if we still have to copy them, hence the need for the
> > pointer. Less code is always nice too, though.
> > 
> > Also fix an amusing bug in bio_integrity_split() - struct bio_pair
> > doesn't have the integrity bvecs after the bio_integrity_payloads, so
> > there was a buffer overrun. The code was confusing pointers with arrays.
> 
> Ummm... patch description doesn't agree with the patch content?

And the patch posted doesn't match the commit in git branch.

Dazed and confused.  Bailing out.  Let's retry next time.

-- 
tejun
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