Re: [PATCH] prctl: add PR_[GS]ET_KILLABLE

[Oleg Nesterov]

On 07/30, Jürg Billeter wrote:
>
> This is required for job control in a shell that uses CLONE_NEWPID for
> child processes.

Could you explain in more details?

> +     case PR_SET_KILLABLE:
> +             if (arg2 != 1 || arg3 || arg4 || arg5)
> +                     return -EINVAL;
> +             me->signal->flags &= ~SIGNAL_UNKILLABLE;

this needs spin_lock_irq(me->sighand->siglock).

Oleg.