The Natural Philosopher  writes:
> On 10/07/18 16:40, Grant Taylor wrote:
>> On 07/10/2018 06:02 AM, Alister wrote:
>>> for all other upgrades a reboot should not be required
>>
>> I think it is STRONGLY recommended to reboot when replacing other
>> core files like the C library that just about everything else on the
>> system uses.
>>
>> I think there are ways around this, but they are cumbersome and error
>> prone.  Their failure will end up in a crash followed by a reboot. 
>> So it's just best to plan for the reboot when doing the update that
>> modifies the kernel and / or core OS libraries.

In Debian (and therefore presumably also Raspbian) a libc upgrade will
automatically result in a lot of services being restarted.

> AIUI any program that uses the core libs will run on, on the old libs
> until its repoened,. so there is no need to shutdown the mnachine,
> just the apps using the libs, and then there is no hurry.
>
> The only app Ive ever seen go unstable after an upgrade unless
> restarted is firefox.

NSS functionality is the main issue; presumably the ABI is tightly
couple to the specific libc version.

--
https://www.greenend.org.uk/rjk/

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