linux-kernel - Re: 2.6.23-rc8-mm2: OOPS in mmc on boot

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Message-ID: <20071004093014.GE23808@kernel.dk>
Date:	Thu, 4 Oct 2007 11:30:14 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Pierre Ossman <drzeus@...eus.cx>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Don Mullis <dwm@...r.net>, linux-kernel@...r.kernel.org
Subject: Re: 2.6.23-rc8-mm2: OOPS in mmc on boot

On Thu, Oct 04 2007, Pierre Ossman wrote:
> On Thu, 4 Oct 2007 10:06:32 +0200
> Jens Axboe <jens.axboe@...cle.com> wrote:
> 
> > On Thu, Oct 04 2007, Pierre Ossman wrote:
> > > 
> > > Huh? Isn't the block layer supposed to fill in the entire thing?
> > > (i.e. current contents shouldn't matter)
> > 
> > Yeah, but sg chaining requires that ->page be filled in properly or it
> > could confuse it. I think I'll add some debugging to catch that.
> > 
> 
> I assume sg_init_one() still can work on an uninitialized sg entry?

Yes, but only if that sg entry is not part of a chained list.

-- 
Jens Axboe

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