linux-kernel - Re: [EXT] Re: [PATCH] nvme: Add abrupt shutdown support

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Message-ID: <20210705104208.GA14891@lst.de>
Date:   Mon, 5 Jul 2021 12:42:08 +0200
From:   Christoph Hellwig <hch@....de>
To:     "Shivamurthy Shastri (sshivamurthy)" <sshivamurthy@...ron.com>
Cc:     Christoph Hellwig <hch@....de>,
        "kbusch@...nel.org" <kbusch@...nel.org>,
        "axboe@...com" <axboe@...com>,
        "sagi@...mberg.me" <sagi@...mberg.me>,
        "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "shiva.linuxworks@...il.com" <shiva.linuxworks@...il.com>
Subject: Re: [EXT] Re: [PATCH] nvme: Add abrupt shutdown support

On Mon, Jul 05, 2021 at 10:40:21AM +0000, Shivamurthy Shastri (sshivamurthy) wrote:
> Micron Confidential
> 
> Hi Christoph,
> 
> > 
> > 
> > On Mon, Jul 05, 2021 at 10:11:57AM +0000, shiva.linuxworks@...il.com wrote:
> > > From: Shivamurthy Shastri <sshivamurthy@...ron.com>
> > >
> > > Enabling the abrupt shutdown support. In this shutdown type host does
> > > not need to send Delete I/O Submission Queue and Delete I/O Completion
> > > queue commands to the device.
> > 
> > Why?
> 
> This is to achieve faster shutdown at the cost of data in-flight.

What is the actual use case, and why would a module paramter be a good
interface?