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decent-im / decent.im

XMPP public service with gateways to other IM networks
https://decent.im
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investigate ways to update kernel with minimal downtime #20

Closed andrey-utkin closed 7 years ago

andrey-utkin commented 7 years ago

Try rebootless techniques: livepatch, kpatch, kexec.

andrey-utkin commented 7 years ago

Adopted kexec. See 61ca605b7cc5edae541b5647487d046208573e3f

It gives 16-30 seconds of SSH service downtime; normal reboot results in ~48 seconds of SSH downtime.