linux-kernel - Re: partition sysfs OOPS in current GIT

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Message-ID: <20080207072030.GA24242@suse.de>
Date:	Wed, 6 Feb 2008 23:20:30 -0800
From:	Greg KH <gregkh@...e.de>
To:	David Miller <davem@...emloft.net>
Cc:	linux-kernel@...r.kernel.org, kay.sievers@...y.org
Subject: Re: partition sysfs OOPS in current GIT

On Wed, Feb 06, 2008 at 11:11:44PM -0800, David Miller wrote:
> From: Greg KH <gregkh@...e.de>
> Date: Wed, 6 Feb 2008 23:00:44 -0800
> 
> > On Wed, Feb 06, 2008 at 10:39:44PM -0800, David Miller wrote:
> > > From: Greg KH <gregkh@...e.de>
> > > Date: Wed, 6 Feb 2008 22:42:10 -0800
> > > 
> > > > On Wed, Feb 06, 2008 at 10:05:44PM -0800, David Miller wrote:
> > > > > I found the problem, it's the "whole_disk" partition attribute.
> > > > 
> > > > I don't understand that code at all, on 2.6.24, what does reading that
> > > > file give you?  At first glance, I don't see how that file would spit
> > > > out anything and not give you the same kind of oops.
> > > > 
> > > > you are in a maze of kobject pointers, all alike...
> > > 
> > > It's supposed to just exist, and be an empty zero length file.
> > > That's why it's given no ->show method pointer.
> > > 
> > > It's existence just means that the partition is a "whole disk"
> > > partition type.
> > 
> > Can you try this patch to see if it solves the oops, and that the file
> > is still there and works properly?
> 
> It doesn't crash, but the file returns -EIO instead of zero when read.

Picky, picky, picky :)

It's odd that the original one didn't also do that, but I'll fix that up
properly, let me try again...

thanks,

greg k-h
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