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SubjectRe: [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 <>
> Signed-off-by: Roger Pau Monné <>
> Cc: Julien Grall <>
> Cc: Konrad Rzeszutek Wilk <>
> Cc: Boris Ostrovsky <>
> Cc: David Vrabel <>
> Cc:

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

Tested-by: Julien Grall <>


Julien Grall

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