Subject: Re: [Xen-devel] [PATCH] xen-netfront: Remove BUGs on paged skb data which crosses a page boundary

From: David Vrabel <[email-masked]>
Date: Mon, 1 Dec 2014 13:27:32 +0000

On 26/11/14 17:28, David Miller wrote:
> From: Seth Forshee <[email-masked]>
> Date: Tue, 25 Nov 2014 20:28:24 -0600
> 
>> These BUGs can be erroneously triggered by frags which refer to
>> tail pages within a compound page. The data in these pages may
>> overrun the hardware page while still being contained within the
>> compound page, but since compound_order() evaluates to 0 for tail
>> pages the assertion fails. The code already iterates through
>> subsequent pages correctly in this scenario, so the BUGs are
>> unnecessary and can be removed.
>>
>> Fixes: f36c374782e4 ("xen/netfront: handle compound page fragments on transmit")
>> Cc: <[email-masked]> # 3.7+
>> Signed-off-by: Seth Forshee <[email-masked]>
> 
> Can I get some Xen developer reviews?

Sorry for the delay, I've been on holiday.

Reviewed-by: David Vrabel <[email-masked]>

Thanks.

David