Re: [PATCH rdma-next 3/5] RDMA/hns: Increase checking CMQ status timeout value

[Wei Hu (Xavier)]

On 2018/5/23 14:09, Wei Hu (Xavier) wrote:
>
> On 2018/5/23 13:49, Leon Romanovsky wrote:
>> On Thu, May 17, 2018 at 04:02:51PM +0800, Wei Hu (Xavier) wrote:
>>> This patch increases checking CMQ status timeout value and
>>> uses the same value with NIC driver to avoid deficiency of
>>> time.
>>>
>>> Signed-off-by: Wei Hu (Xavier) <xavier.huwei@xxxxxxxxxx>
>>> ---
>>>  drivers/infiniband/hw/hns/hns_roce_hw_v2.h | 2 +-
>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.h b/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
>>> index 182b672..f16df1b 100644
>>> --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
>>> +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
>>> @@ -76,7 +76,7 @@
>>>  #define HNS_ROCE_V2_PAGE_SIZE_SUPPORTED		0xFFFFF000
>>>  #define HNS_ROCE_V2_MAX_INNER_MTPT_NUM		2
>>>  #define HNS_ROCE_INVALID_LKEY			0x100
>>> -#define HNS_ROCE_CMQ_TX_TIMEOUT			200
>>> +#define HNS_ROCE_CMQ_TX_TIMEOUT			30000
>> Don't you think that loop of 30 seconds too much?
>>
>> Thanks
> Leon, 30ms
Because firmware take turns excuting NIC and RoCE command.
Although RoCE command does not  take so long,  we still use
the same timeout value with NIC driver.
Thanks
>>>  #define HNS_ROCE_CONTEXT_HOP_NUM		1
>>>  #define HNS_ROCE_MTT_HOP_NUM			1
>>> --
>>> 1.9.1
>>>
>
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