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

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Message-ID: <20240814025926-mutt-send-email-mst@kernel.org>
Date: Wed, 14 Aug 2024 03:00:02 -0400
From: "Michael S. Tsirkin" <mst@...hat.com>
To: Si-Wei Liu <si-wei.liu@...cle.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

On Tue, Aug 13, 2024 at 08:39:53PM -0700, Si-Wei Liu wrote:
> 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
> 

OK, I posted an untested revert for your testing:

Message-ID: <20240511031404.30903-1-xuanzhuo@...ux.alibaba.com>



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