On 06/11, Ingo Molnar wrote:
>
> @@ -1592,6 +1592,22 @@ static struct task_struct *copy_process(unsigned long 
> clone_flags,
>       syscall_tracepoint_update(p);
>       write_unlock_irq(&tasklist_lock);
>  
> +     /*
> +      * If we have a new PGD then initialize it:
> +      *
> +      * This method is called after a task has been made visible
> +      * on the task list already.
> +      *
> +      * Architectures that manage per task kernel pagetables
> +      * might use this callback to initialize them after they
> +      * are already visible to new updates.
> +      *
> +      * NOTE: any user-space parts of the PGD are already initialized
> +      *       and must not be clobbered.
> +      */
> +     if (p->mm != current->mm)
> +             arch_pgd_init_late(p->mm, p->mm->pgd);
> +

Cosmetic, but imo

        if (!(clone_flags & CLONE_VM))
                arch_pgd_init_late(...);

will look better and more consistent.

Oleg.

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