linux-kernel - Re: [PATCH 1/2] xen/netback: don't do grant copy across page boundary

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Message-ID: <04f7b88c-a7dd-6d63-4938-06e71a194aa3@xen.org>
Date:   Mon, 27 Mar 2023 10:04:02 +0100
From:   Paul Durrant <xadimgnik@...il.com>
To:     Juergen Gross <jgross@...e.com>, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org
Cc:     Wei Liu <wei.liu@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        xen-devel@...ts.xenproject.org, stable@...r.kernel.org
Subject: Re: [PATCH 1/2] xen/netback: don't do grant copy across page boundary

On 27/03/2023 09:36, Juergen Gross wrote:
> Fix xenvif_get_requests() not to do grant copy operations across local
> page boundaries. This requires to double the maximum number of copy
> operations per queue, as each copy could now be split into 2.
> 
> Make sure that struct xenvif_tx_cb doesn't grow too large.
> 
> Cc: stable@...r.kernel.org
> Fixes: ad7f402ae4f4 ("xen/netback: Ensure protocol headers don't fall in the non-linear area")
> Signed-off-by: Juergen Gross <jgross@...e.com>
> ---
>   drivers/net/xen-netback/common.h  |  2 +-
>   drivers/net/xen-netback/netback.c | 25 +++++++++++++++++++++++--
>   2 files changed, 24 insertions(+), 3 deletions(-)
> 

Reviewed-by: Paul Durrant <paul@....org>