linux-kernel - Re: [PATCH net] Revert "vhost: cache used event for better performance"

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Date:   Wed, 26 Jul 2017 12:53:38 +0200
From:   Christian Borntraeger <borntraeger@...ibm.com>
To:     Jason Wang <jasowang@...hat.com>, mst@...hat.com
Cc:     virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] Revert "vhost: cache used event for better
 performance"

On 07/26/2017 10:03 AM, Jason Wang wrote:
> This reverts commit 809ecb9bca6a9424ccd392d67e368160f8b76c92. Since it
> was reported to break vhost_net. We want to cache used event and use
> it to check for notification. We try to valid cached used event by
> checking whether or not it was ahead of new, but this is not correct
> all the time, it could be stale and there's no way to know about this.
> 
> Signed-off-by: Jason Wang <jasowang@...hat.com>

This would then qualify for stable ?