netdev - Re: [PATCH V2 net-next 2/5] xen-netback: Add support for multiple queues

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Date:	Fri, 14 Feb 2014 15:42:54 +0000
From:	Andrew Bennieston <andrew.bennieston@...rix.com>
To:	Wei Liu <wei.liu2@...rix.com>
CC:	<xen-devel@...ts.xenproject.org>, <ian.campbell@...rix.com>,
	<paul.durrant@...rix.com>, <netdev@...r.kernel.org>
Subject: Re: [PATCH V2 net-next 2/5] xen-netback: Add support for multiple
 queues

On 14/02/14 15:36, Wei Liu wrote:
> On Fri, Feb 14, 2014 at 02:57:25PM +0000, Andrew Bennieston wrote:
>> On 14/02/14 14:11, Wei Liu wrote:
>>> On Fri, Feb 14, 2014 at 11:50:21AM +0000, Andrew J. Bennieston wrote:
>>> [...]
>>>>
>>>> +extern unsigned int xenvif_max_queues;
>>>> +
>>>>   #endif /* __XEN_NETBACK__COMMON_H__ */
>>>> diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c
>>>> index 4cde112..4dc092c 100644
>>>> --- a/drivers/net/xen-netback/interface.c
>>>> +++ b/drivers/net/xen-netback/interface.c
>>>> @@ -373,7 +373,12 @@ struct xenvif *xenvif_alloc(struct device *parent, domid_t domid,
>>>>   	char name[IFNAMSIZ] = {};
>>>>
>>>>   	snprintf(name, IFNAMSIZ - 1, "vif%u.%u", domid, handle);
>>>> -	dev = alloc_netdev_mq(sizeof(struct xenvif), name, ether_setup, 1);
>>>> +	/* Allocate a netdev with the max. supported number of queues.
>>>> +	 * When the guest selects the desired number, it will be updated
>>>> +	 * via netif_set_real_num_tx_queues().
>>>> +	 */
>>>> +	dev = alloc_netdev_mq(sizeof(struct xenvif), name, ether_setup,
>>>> +						  xenvif_max_queues);
>>>
>>> Indentation.
>>
>> How would you like this to be indented? The CodingStyle says (and I quote):
>> Chapter 2: Breaking long lines and strings:
>> 	... descendants are always substantially shorter than the
>> 	parent and placed substantially to the right...
>>
>> There is no further advice to this point in CodingStyle, so please
>> explain how you'd prefer this.
>>
>
> Kernel code in general use indentation style like
>
> 	dev = alloc_netdev_mq(sizeof(struct xenvif), name, ether_setup,
> 			      xenvif_max_queues);
>
> You can find lots of examples in existing kernel code.
>
> Probably "place substantially to the right" is just too vague. :-)

Ah, I think the issue here is that my editor was configured to have a 
tab width of 4, so the offending line _did_ look to be aligned to the 
opening ( of the line above, to me. I'll set the appropriate tab width 
and change it.

Cheers,
Andrew
>
> Wei.
>

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