Linux SCSI subsystem development
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From: Bart Van Assche <bvanassche@acm.org>
To: Zhe Wang <zhe.wang1@unisoc.com>,
	martin.petersen@oracle.com, jejb@linux.ibm.com,
	alim.akhtar@samsung.com, avri.altman@wdc.com,
	quic_asutoshd@quicinc.com
Cc: linux-scsi@vger.kernel.org, orsonzhai@gmail.com,
	yuelin.tang@unisoc.com, zhenxiong.lai@unisoc.com,
	zhang.lyra@gmail.com, zhewang116@gmail.com
Subject: Re: [PATCH] scsi: ufs: core: Add compl_time_stamp_local_clock assignment
Date: Wed, 1 Nov 2023 09:43:07 -0700	[thread overview]
Message-ID: <f1be8bb5-7fac-45b3-a428-d5ba9b1ec260@acm.org> (raw)
In-Reply-To: <20231101071420.29238-1-zhe.wang1@unisoc.com>


On 11/1/23 00:14, Zhe Wang wrote:
> The compl_time_stamp_local_clock assignment seems to have been
> accidentally deleted in the previous patch, so it needs to be added
> again for debugging needs.
> 
> Fixes: c30d8d010b5e ("scsi: ufs: core: Prepare for completion in MCQ")
> Signed-off-by: Zhe Wang <zhe.wang1@unisoc.com>
> ---
>   drivers/ufs/core/ufshcd.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
> index 8382e8cfa414..b35977fa931f 100644
> --- a/drivers/ufs/core/ufshcd.c
> +++ b/drivers/ufs/core/ufshcd.c
> @@ -5388,6 +5388,7 @@ void ufshcd_compl_one_cqe(struct ufs_hba *hba, int task_tag,
>   
>   	lrbp = &hba->lrb[task_tag];
>   	lrbp->compl_time_stamp = ktime_get();
> +	lrbp->compl_time_stamp_local_clock = local_clock();
>   	cmd = lrbp->cmd;
>   	if (cmd) {
>   		if (unlikely(ufshcd_should_inform_monitor(hba, lrbp)))

Is anyone using the data tracked in compl_time_stamp /
compl_time_stamp_local_clock? I'm wondering whether the code for
tracking command duration can be removed. Otherwise the above patch 
looks fine to me.

Thanks,

Bart.

  reply	other threads:[~2023-11-01 16:43 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-01  7:14 [PATCH] scsi: ufs: core: Add compl_time_stamp_local_clock assignment Zhe Wang
2023-11-01 16:43 ` Bart Van Assche [this message]
2023-11-02  7:59   ` Zhe Wang

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