On Fri, Nov 6, 2020 at 11:33 PM Andrew Morton <[email protected]> wrote: > > On Fri, 6 Nov 2020 21:07:04 +0100 Matteo Croce <[email protected]> > wrote: > > > The kernel cmdline reboot= option offers some sort of control > > on how the reboot is issued. > > Add handles in sysfs to allow setting these reboot options, so they > > can be changed when the system is booted, other than at boot time. > > Please include a description of why you believe the kernel needs this > feature. Use cases, end-user benefits, etc. > > We've survived this long without it - what changed?
Hi Andrew, We don't always know in advance what type of reboot to perform. Sometimes a warm reboot is preferred to persist certain memory regions across the reboot. Others a cold one is needed to apply a future system update that makes a memory memory model change, like changing the base page size or resizing a persistent memory region. Or simply we want to enable reboot_force because we noticed that something bad happened. Bye, -- per aspera ad upstream
