[Ksummit-discuss] [CORE TOPIC] live patching

[Jiri Kosina]

On Thu, 9 Jul 2015, Kamezawa Hiroyuki wrote:

> I'm sorr if this is off-topic.
> 
> I think the problem of "freezer v.s. FUSE" will happen if we neet to 
> stop user proceesses. AFAIK, the problem is a deadlock that fuse daemon 
> freezes even while its client wating for a reply.
> 
> example)
>    client -> page-fault -> GUP -> fuse daemon -> gethostbyname() -> nscd.8
> 
> We can't detect this kind of dependency if we need to freeze userland.

Freezing of userspace is happening every time system goes through 
hibernation.

-- 
Jiri Kosina
SUSE Labs