linux-kernel - Re: [PATCH net] vhost: correctly check the iova range when waking virtqueue

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Date:   Sat, 25 Aug 2018 17:40:21 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     jasowang@...hat.com
Cc:     mst@...hat.com, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, peterx@...hat.com
Subject: Re: [PATCH net] vhost: correctly check the iova range when waking
 virtqueue

From: Jason Wang <jasowang@...hat.com>
Date: Fri, 24 Aug 2018 16:53:13 +0800

> We don't wakeup the virtqueue if the first byte of pending iova range
> is the last byte of the range we just got updated. This will lead a
> virtqueue to wait for IOTLB updating forever. Fixing by correct the
> check and wake up the virtqueue in this case.
> 
> Fixes: 6b1e6cc7855b ("vhost: new device IOTLB API")
> Reported-by: Peter Xu <peterx@...hat.com>
> Signed-off-by: Jason Wang <jasowang@...hat.com>
> ---
> The patch is needed for -stable.

Applied and queued up for -stable, thanks Jason.