Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Message-ID: <d00dacbd2a1b57dfdecd184303ab2bee47f3d7f9.camel@gmail.com>
Subject: Re: [PATCH V2 4/4] scsi: ufs-debugfs: Add user-defined exception
 event rate limiting
From:   Bean Huo <huobean@gmail.com>
To:     Adrian Hunter <adrian.hunter@intel.com>,
        "Martin K . Petersen" <martin.petersen@oracle.com>,
        "James E . J . Bottomley" <jejb@linux.ibm.com>
Cc:     linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
        Alim Akhtar <alim.akhtar@samsung.com>,
        Avri Altman <avri.altman@wdc.com>,
        Can Guo <cang@codeaurora.org>,
        Stanley Chu <stanley.chu@mediatek.com>
Date:   Mon, 15 Feb 2021 18:10:39 +0100
In-Reply-To: <20210209062437.6954-5-adrian.hunter@intel.com>
References: <20210209062437.6954-1-adrian.hunter@intel.com>
         <20210209062437.6954-5-adrian.hunter@intel.com>
Content-Type: text/plain; charset="UTF-8"
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
Precedence: bulk

On Tue, 2021-02-09 at 08:24 +0200, Adrian Hunter wrote:
> An enabled user-specified exception event that does not clear quickly
> will
> repeatedly cause the handler to run. That could unduly disturb the
> driver
> behaviour being tested or debugged. To prevent that add debugfs file
> exception_event_rate_limit_ms. When a exception event happens, it is
> disabled, and then after a period of time (default 20ms) the
> exception
> event is enabled again.
> 
> Note that if the driver also has that exception event enabled, it
> will not
> be disabled.
> 
> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Bean Huo <beanhuo@micron.com>