Re: [EXT] Re: [PATCH] nvme: Add abrupt shutdown support

[Christoph Hellwig]

On Mon, Jul 05, 2021 at 11:15:51AM +0000, Shivamurthy Shastri (sshivamurthy) wrote:
> 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. 

If you have a device that always prefers an abrupt please introduce a TP
in the NVMe technical working group so that the hosts automatically
do the right thing.  Requiring sysadmin intervention using a global
kernel parameter is not the way to do this.