[kpatch] Kpatch support for my own application on top of redhat kernel

[Evgenii Shatokhin]

Hi,

On 08.08.2019 17:15, Josh Poimboeuf wrote:
> On Thu, Aug 08, 2019 at 09:12:44AM -0500, Josh Poimboeuf wrote:
>> On Thu, Aug 08, 2019 at 05:03:50PM +0530, Babu Prasad wrote:
>>> Hi Team,
>>>                 I'm running my own application on top of redhat linux, so I
>>> need give a kpatch support for my applications, can you please help how I
>>> can build my application to support kpatch.
>>
>> Hi Babu,
>>
>> kpatch is very specific to kernel patching.  I wouldn't suggest trying
>> to use it for user space patching.
>>
>> A SUSE engineer was working on a user space live patching library, but I
>> don't know if it's still active:
>>
>>    https://github.com/SUSE/libpulp
> 
> I should also mention that there are other user-space-patching related
> projects out there, but I don't have the links handy.  Maybe Joe
> Lawrence will chime in here, he's had more experiences with it.
> 

There are at least two more such projects I am aware of:

https://github.com/cloudlinux/libcare
https://github.com/virtuozzo/nsb

AFAIK, both did not go very far beyond proof-of-concept: user-space 
patching turned out more difficult than live patching of the kernel.

Regards,
Evgenii