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

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Message-ID: <5B0505A9.8040908@huawei.com>
Date:   Wed, 23 May 2018 14:09:45 +0800
From:   "Wei Hu (Xavier)" <xavier.huwei@...wei.com>
To:     Leon Romanovsky <leon@...nel.org>
CC:     <dledford@...hat.com>, <jgg@...pe.ca>,
        <linux-rdma@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <xavier.huwei@....com>, <lijun_nudt@....com>
Subject: Re: [PATCH rdma-next 3/5] RDMA/hns: Increase checking CMQ status
 timeout value



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@...wei.com>
>> ---
>>  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
>
>>  #define HNS_ROCE_CONTEXT_HOP_NUM		1
>>  #define HNS_ROCE_MTT_HOP_NUM			1
>> --
>> 1.9.1
>>