linux-kernel - Re: [PATCH v4] scsi: ufs: core: Add trace event for MCQ

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Date:   Fri, 10 Mar 2023 12:19:59 +0800
From:   Ziqi Chen <quic_ziqichen@...cinc.com>
To:     Bart Van Assche <bvanassche@....org>, <quic_asutoshd@...cinc.com>,
        <quic_cang@...cinc.com>, <mani@...nel.org>,
        <stanley.chu@...iatek.com>, <adrian.hunter@...el.com>,
        <beanhuo@...ron.com>, <avri.altman@....com>,
        <junwoo80.lee@...sung.com>, <martin.petersen@...cle.com>
CC:     <linux-scsi@...r.kernel.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:TRACING" <linux-trace-kernel@...r.kernel.org>
Subject: Re: [PATCH v4] scsi: ufs: core: Add trace event for MCQ


On 3/9/2023 11:45 PM, Bart Van Assche wrote:
> On 3/8/23 18:44, Ziqi Chen wrote:
>> Thanks for you suggestion. But the member hwq->id is an Unsigned 
>> integer. if you want to identify SDB mode and MCQ mode,  using "0" is 
>> enough, Or how about add string such as below?
>>
>> ufshcd_command: MCQ: complete_rsp: 1d84000.ufshc: tag: 14, DB: 0x0, 
>> size: 32768, IS: 0, LBA: 5979448,opcode: 0x2a (WRITE_10),group_id: 
>> 0x0, hqid: 2
> 
> Hi Ziqi,
> 
> Since 0 is a valid queue ID using 0 to identify the legacy command 
> submission mechanism is ambiguous.
> 
> Thanks,
> 
> Bart.

OK, let me convert hwq id to int from ftrace side.


Best Regards,
Ziqi