Re: [Ksummit-discuss] [CORE TOPIC] [TECH TOPIC] live kernel patching

[Chris Mason <clm@fb.com>]

On 05/05/2014 05:58 PM, Andy Lutomirski wrote:
> On Mon, May 5, 2014 at 7:00 AM, Chris Mason <clm@fb.com> wrote:
>> On 05/02/2014 03:42 PM, Jiri Kosina wrote:
>>>
>>> Runtime/live kernel patching is becoming a topic these days. There are
>>> several parallel implementations currently evolving in parallel (kpatch,
>>> kgraft, criu-based solution, ksplice to some extent), all of them having
>>> their pros and cons.
>>>
>>> It's clear that what is going to get merged at the end of the day would
>>> have to be some super-position of the currently existing solutions.
>>>
>>> Finding a reasonable compromise might be challenging. Having discussion
>>> between the groups working on those solutions (tech topic) and with
>>> "general maintainer audience" to face the flame^W^W^Wobtain feedback
>>> (core topic) would be very valuable step in converging to unified
>>> solution.
>>>
>>> Suggested participants: see the list of "competing" projects above
>>>
>>
>> Tons of interest in this topic here, mostly for the in-memory database
>> workloads.
>
> Would in-memory databases be happier if there were a way to kexec
> without losing your data?

Yes, for these apps we could just define a chunk of ram that was 
supposed to stay the same after kexec and they would be happy.

-chris