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From: "Shivamurthy Shastri (sshivamurthy)" <sshivamurthy@micron.com>
To: Christoph Hellwig <hch@lst.de>
Cc: "kbusch@kernel.org" <kbusch@kernel.org>,
	"axboe@fb.com" <axboe@fb.com>,
	"sagi@grimberg.me" <sagi@grimberg.me>,
	"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"shiva.linuxworks@gmail.com" <shiva.linuxworks@gmail.com>
Subject: RE: [EXT] Re: [PATCH] nvme: Add abrupt shutdown support
Date: Mon, 5 Jul 2021 11:15:51 +0000	[thread overview]
Message-ID: <BLAPR08MB690003D5D175FC784DE844F8B81C9@BLAPR08MB6900.namprd08.prod.outlook.com> (raw)
In-Reply-To: <20210705104208.GA14891@lst.de>

Micron Confidential

> >
> > Hi Christoph,
> >
> > >
> > >
> > > On Mon, Jul 05, 2021 at 10:11:57AM +0000, shiva.linuxworks@gmail.com
> wrote:
> > > > From: Shivamurthy Shastri <sshivamurthy@micron.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?

For systems with passive electronic components to handle power-loss/battery-removal,
CC.SHN=10b will help to achieve safer shutdown with relatively lower power back-up 
requirements (at lower cost).

The module parameter gives flexibility to the host to decide shutdown type even during
boot failure. 

Thanks,
Shiva

Micron Confidential

  reply	other threads:[~2021-07-05 11:16 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-05 10:11 [PATCH] nvme: Add abrupt shutdown support shiva.linuxworks
2021-07-05 10:15 ` Christoph Hellwig
2021-07-05 10:40   ` [EXT] " Shivamurthy Shastri (sshivamurthy)
2021-07-05 10:42     ` Christoph Hellwig
2021-07-05 11:15       ` Shivamurthy Shastri (sshivamurthy) [this message]
2021-07-05 11:53         ` Christoph Hellwig
2021-07-05 13:04           ` Keith Busch
2021-07-06  8:14             ` Shivamurthy Shastri (sshivamurthy)
2021-07-06 15:07               ` Keith Busch

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