From: Jaegeuk Kim <jaegeuk@kernel.org>
To: Christoph Hellwig <hch@infradead.org>
Cc: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org,
"Martin K . Petersen" <martin.petersen@oracle.com>,
Bart Van Assche <bvanassche@acm.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Avri Altman <avri.altman@wdc.com>, Bean Huo <beanhuo@micron.com>,
Stanley Chu <stanley.chu@mediatek.com>,
Can Guo <cang@codeaurora.org>
Subject: Re: [PATCH] scsi: ufs: support IO traces for zoned block device
Date: Mon, 27 Feb 2023 15:15:51 -0800 [thread overview]
Message-ID: <Y/05p0jYrg2wfXw6@google.com> (raw)
In-Reply-To: <Y+3GzX6yMOKUFTh3@infradead.org>
On 02/15, Christoph Hellwig wrote:
> Why does UFS even have it's own common tracing instad of just relying
> on the core SCSI one, and even worse pokes into command set specifics
> which is a no-go for LLDDs. This code simply needs to go away instead
> of beeing "enhanced".
I'm not sure how all the other vendors use the trace tho, at least to me,
it's quite useful when debugging any UFS-specific information such as
group_id and doorbell status along with the attached scsi command, in
addition to the accurate latency measurements.
next prev parent reply other threads:[~2023-02-27 23:15 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-15 19:04 [PATCH] scsi: ufs: support IO traces for zoned block device Jaegeuk Kim
2023-02-15 19:13 ` Bart Van Assche
2023-02-16 6:01 ` Christoph Hellwig
2023-02-27 23:15 ` Jaegeuk Kim [this message]
2023-02-28 7:28 ` Avri Altman
2023-03-20 12:55 ` hch
2023-03-20 12:55 ` Christoph Hellwig
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