On 08/08, [EMAIL PROTECTED] wrote:
> 
> From: Sukadev Bhattiprolu <[EMAIL PROTECTED]>
> Subject: [PATCH] Allow signalling container-init
> 
> Only the global-init process must be special - any other container-init
> process must be killable to prevent run-away processes in the system.

I think you are right, but....

> --- lx26-23-rc1-mm1.orig/kernel/signal.c      2007-08-07 13:52:12.000000000 
> -0700
> +++ lx26-23-rc1-mm1/kernel/signal.c   2007-08-08 15:09:27.000000000 -0700
> @@ -1861,11 +1861,9 @@ relock:
>                       continue;
>  
>               /*
> -              * Init of a pid space gets no signals it doesn't want from
> -              * within that pid space. It can of course get signals from
> -              * its parent pid space.
> +              * Global init gets no signals it doesn't want.
>                */
> -             if (current == task_child_reaper(current))
> +             if (is_global_init(current->group_leader))
>                       continue;

...this breaks exec() from /sbin/init. Note that de_thread() kills other
sub-threads with SIGKILL. With this patch de_thread() will hang waiting
for other threads to die.

I think it is better to not change the current behaviour which is not
perfect (buggy), until we actually protect /sbin/init from unwanted
signals.

(That said, I am not sure what behaviour is better (worse :), with or
 without this patch)

Oleg.

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