linux-kernel - Re: [PATCH] xen-blkback: Switch to closed state after releasing the backing device

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Message-ID: <b67866fc-13b7-ef88-c8db-2745127e5f6a@suse.com>
Date:   Wed, 29 Aug 2018 10:43:48 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Valentin Vidic <Valentin.Vidic@...Net.hr>
Cc:     Roger Pau Monné <roger.pau@...rix.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Jens Axboe <axboe@...nel.dk>, xen-devel@...ts.xenproject.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH] xen-blkback: Switch to closed state after releasing the
 backing device

On 29/08/18 10:27, Valentin Vidic wrote:
> On Wed, Aug 29, 2018 at 10:16:09AM +0200, Juergen Gross wrote:
>> Did you test whether it is okay to not change state in case the device
>> is still online?
> 
> Not sure how to simulate that. Maybe using xl block-detach or something else?
> 

I think this should be an action triggered by the frontend, not by dom0
(xen tools will always set "online" to 0 when removing a device, AFAIK).

I'm not sure this is relevant, but I realized this behavior is changed
by your patch.


Juergen