[dpdk-dev] [PATCH] net/mlx5: check Tx queue size overflow

[Yongseok Koh]

> On Apr 30, 2019, at 5:43 PM, Yongseok Koh <yskoh at mellanox.com> wrote:
> 
>> 
>> On Apr 30, 2019, at 1:46 PM, Stephen Hemminger <stephen at networkplumber.org> wrote:
>> 
>> On Tue, 30 Apr 2019 12:04:26 -0700
>> Yongseok Koh <yskoh at mellanox.com> wrote:
>> 
>>> +	    priv->sh->device_attr.orig_attr.max_qp_wr) {
>>> +		DRV_LOG(DEBUG,
>>> +			"port %u Tx WQEBB count exceeds the limit (%d),"
>>> +			" try smaller queue size again",
>>> +			dev->data->port_id,
>> 
>> The patch looks good, but it could be improved to make life easier
>> for the users.
>> 
>> This is an error, why not print it at NOTICE level since DEBUG messages
>> are usually suppressed.
> 
> Okay, better to set ERROR.
> 
>> Please don't break long lines in log messages.
> 
> That doesn't add new-line and mlx5 specific coding style.
> 
>> The latter part of the message
>> is obvious, why not skip it.
> 
> Because not all users know what WQEBB means, I wanted to make user's life easier
> by informing what to do.
> 
>> Also since max_qp_wr is __u32, the print format should be %u
> 
> It was copied from the removing line but agree to change.

No, it is 'int'. Please check 'struct ibv_device_attr'.

> 
>> Instead:
>> 		DRV_LOG(NOTICE,
>> 			"port %u Tx WQEBB count (%u) exceeds the limit (%u)",
>> 			dev->data->port_id,
>> 			txq_calc_wqebb_cnt(tmpl),
>> 			priv->sh->device_attr.orig_attr.max_qp_wr);
>> 
>> Also, should it have a Fixes: tag to backport to stable?
> 
> Okay, no harm to give more information.
> 
> 
> Thanks for the review.
> Yongseok