linux-kernel - Re: [Xen-devel] [PATCH] xen-blkback: free requests on disconnection

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Date:	Fri, 4 Sep 2015 14:51:10 +0100
From:	Julien Grall <julien.grall@...rix.com>
To:	Roger Pau Monne <roger.pau@...rix.com>,
	<linux-kernel@...r.kernel.org>
CC:	David Vrabel <david.vrabel@...rix.com>,
	<xen-devel@...ts.xenproject.org>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>
Subject: Re: [Xen-devel] [PATCH] xen-blkback: free requests on disconnection

Hi Roger,

On 04/09/15 11:08, Roger Pau Monne wrote:
> Request allocation has been moved to connect_ring, which is called every
> time blkback connects to the frontend (this can happen multiple times during
> a blkback instance life cycle). On the other hand, request freeing has not
> been moved, so it's only called when destroying the backend instance. Due to
> this mismatch, blkback can allocate the request pool multiple times, without
> freeing it.
> 
> In order to fix it, move the freeing of requests to xen_blkif_disconnect to
> restore the symmetry between request allocation and freeing.
> 
> Reported-by: Julien Grall <julien.grall@...rix.com>
> Signed-off-by: Roger Pau Monné <roger.pau@...rix.com>
> Cc: Julien Grall <julien.grall@...rix.com>
> Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> Cc: Boris Ostrovsky <boris.ostrovsky@...cle.com>
> Cc: David Vrabel <david.vrabel@...rix.com>
> Cc: xen-devel@...ts.xenproject.org

The patch is fixing my problem when using UEFI in the guest. Thank you!

Tested-by: Julien Grall <julien.grall@...rix.com>

Regards,

-- 
Julien Grall
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