linux-kernel - Re: [PATCH] xen/balloon: fix cancelled balloon action

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Message-ID: <efaa22aa-2785-b03a-3c14-0ec232429945@oracle.com>
Date:   Tue, 5 Oct 2021 21:11:41 -0400
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Juergen Gross <jgross@...e.com>, xen-devel@...ts.xenproject.org,
        linux-kernel@...r.kernel.org
Cc:     Stefano Stabellini <sstabellini@...nel.org>,
        stable@...r.kernel.org,
        Marek Marczykowski-Górecki 
        <marmarek@...isiblethingslab.com>
Subject: Re: [PATCH] xen/balloon: fix cancelled balloon action


On 10/5/21 9:34 AM, Juergen Gross wrote:
> In case a ballooning action is cancelled the new kernel thread handling
> the ballooning might end up in a busy loop.
>
> Fix that by handling the cancelled action gracefully.
>
> While at it introduce a short wait for the BP_WAIT case.
>
> Cc: stable@...r.kernel.org
> Fixes: 8480ed9c2bbd56 ("xen/balloon: use a kernel thread instead a workqueue")
> Reported-by: Marek Marczykowski-Górecki <marmarek@...isiblethingslab.com>
> Signed-off-by: Juergen Gross <jgross@...e.com>


Reviewed-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>