netdev - Re: [PATCH] virtio_net: lower limit on buffer size

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Message-ID: <3dd90d56-7110-bb9e-0b7f-4c8a8003a57f@cogentembedded.com>
Date:   Fri, 2 Jun 2017 12:34:57 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>, linux-kernel@...r.kernel.org
Cc:     Mikulas Patocka <mpatocka@...hat.com>,
        "J. Bruce Fields" <bfields@...ldses.org>,
        Jason Wang <jasowang@...hat.com>,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org
Subject: Re: [PATCH] virtio_net: lower limit on buffer size

Hello!

On 6/2/2017 2:56 AM, Michael S. Tsirkin wrote:

> commit d85b758f72b0 "virtio_net: fix support for small rings"

    Commit d85b758f72b0 ("virtio_net: fix support for small rings")

> was supposed to increase the buffer size for small rings
> but had an unintentional side effect of decreasing
> it for large rings. This seems to break some setups -
> it's not yet clear why, but increasing buffer size
> back to what it was before helps.
>
> Fixes: d85b758f72b0 "virtio_net: fix support for small rings"

Fixes: d85b758f72b0 ("virtio_net: fix support for small rings")

> Reported-by: Mikulas Patocka <mpatocka@...hat.com>
> Reported-by: "J. Bruce Fields" <bfields@...ldses.org>
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
[...]

MBR, Sergei