netdev - Re: [PATCH net-next v5 1/4] virtio_ring: enable premapped mode whatever use_dma

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Message-ID: <3a6bc28d-dc53-430f-b308-b639276bdc39@oracle.com>
Date: Tue, 13 Aug 2024 20:39:53 -0700
From: Si-Wei Liu <si-wei.liu@...cle.com>
To: "Michael S. Tsirkin" <mst@...hat.com>
Cc: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, netdev@...r.kernel.org,
        Jason Wang <jasowang@...hat.com>, Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
        virtualization@...ts.linux.dev, Darren Kenny <darren.kenny@...cle.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>
Subject: Re: [PATCH net-next v5 1/4] virtio_ring: enable premapped mode
 whatever use_dma_api

Hi Michael,

I'll look for someone else from Oracle to help you on this, as the 
relevant team already did verify internally that reverting all 4 patches 
from this series could help address the regression. Just reverting one 
single commit won't help.

   9719f039d328 virtio_net: remove the misleading comment
   defd28aa5acb virtio_net: rx remove premapped failover code
   a377ae542d8d virtio_net: big mode skip the unmap check
   f9dac92ba908 virtio_ring: enable premapped mode whatever use_dma_api

In case I fail to get someone to help, could you work with Darren 
(cc'ed) directly? He could reach out to the corresponding team in Oracle 
to help with testing.

Thanks,
-Siwei


On 8/13/2024 12:46 PM, Michael S. Tsirkin wrote:
> Want to post a patchset to revert?
>