linux-kernel - Re: [PATCH 0/1] aoe: ensure we initialise the request

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Date:	Sat, 22 Aug 2009 11:21:03 +0200
From:	Bruno Prémont <bonbons@...ux-vserver.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Andy Whitcroft <apw@...onical.com>,
	"Ed L. Cashin" <ecashin@...aid.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andy Whitcroft <apw@...onical.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/1] aoe: ensure we initialise the request_queue
 correctly

Rafael, this matches regression bug #13942 "Troubles with AoE and
uninitialized object".

Will test and report how it works out here.

Bruno


On Fri, 21 August 2009 Andy Whitcroft <apw@...onical.com> wrote:
> We have been seeing oopses in very recent kernels when using the AOE
> driver. When attempting to mount remote devices we get a warning from
> the kobject layer:
> 
>   [ 2645.959090] kobject '<NULL>' (ffff880059ca22c0): tried to add
> 	an uninitialized object, something is seriously wrong.
> 
> Looking at the driver it seems to have always had an embedded
> request_queue and it is this that is throwing the error.  It appears
> the intent is tha these would be allocated and released using
> helpers, and the lack of these leaves the object uninitialised and
> throws the error.  It is unclear how this could ever have worked.
> Anyhow the following email contains a patch to allocate and release
> this request_queue via the standard helpers. This has bene shown to
> fix the issue in testing.
> 
> Comments.
> 
> -apw
> 
> Andy Whitcroft (1):
>   aoe: ensure we initialise the request_queue correctly
> 
>  drivers/block/aoe/aoe.h    |    2 +-
>  drivers/block/aoe/aoeblk.c |    6 +++---
>  drivers/block/aoe/aoedev.c |   11 ++++++++++-
>  3 files changed, 14 insertions(+), 5 deletions(-)
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