linux-kernel - Re: [PATCH 2/8] block: fix SG_IO vector request data length handling

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Message-ID: <20090401115058.GD5178@kernel.dk>
Date:	Wed, 1 Apr 2009 13:50:58 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Cc:	tj@...nel.org, bharrosh@...asas.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/8] block: fix SG_IO vector request data length
	handling

On Wed, Apr 01 2009, FUJITA Tomonori wrote:
> On Wed,  1 Apr 2009 20:04:38 +0900
> Tejun Heo <tj@...nel.org> wrote:
> 
> > Impact: fix SG_IO behavior such that it matches the documentation
> > 
> > SG_IO howto says that if ->dxfer_len and sum of iovec disagress, the
> > shorter one wins.  However, the current implementation returns -EINVAL
> > for such cases.  Trim iovc if it's longer than ->dxfer_len.
> 
> Is that description about sg's SG_IO?

The more important question is what sg.c actually does, that's more
important than the documentation.

-- 
Jens Axboe

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