Re: Oops on aoe module removal

From: Josh Boyer
Date: Thu Jan 03 2013 - 16:01:24 EST

On Thu, Jan 03, 2013 at 02:50:46PM -0600, Ed Cashin wrote:
> >>> The blk_alloc_queue has already done a bdi_init, so do not bdi_init again in
> >>> aoeblk_gdalloc.
> >>>
> >>> The patch below applies to v3.5.6, with its v47 aoe driver. On my system it
> >>> eliminates the list_del corruption messages.
> >>
> >> Since the patch doesn't apply to current -git, does the problem not
> >> exist there?
> >
> > The original post is about an older kernel with the v47 aoe driver. The current mainline has a v81 aoe driver, so the patch for v3.5.6 isn't expected to apply to the mainline.
> >
> > I'm currently investigating the state of the mainline with relation to this issue.
> I don't see the extra call to bdi_init in aoe driver v81 in the mainline git tree, and
> I don't see the symptoms under discussion, either, when performing the same
> test steps.
> Kernels with aoe v47 can use the patch I just posted.
> I'm going to go through the stable kernels and check, but I believe kernels after
> v47 but before commit 0a41409c5180 should apply the fix in 0a41409c5180:
> commit 0a41409c518083133e79015092585d68915865be
> Author: Ed Cashin <ecashin@xxxxxxxxxx>
> Date: Mon Dec 17 16:03:58 2012 -0800
> aoe: remove vestigial request queue allocation
> Josh, can you confirm that the patch I posted in this thread today works for
> your customer?

Sure. I'll get a test kernel built with that patch and ask them to

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