Re: [PATCH 05/12] mm: Introduce arch_pgd_init_late()

[Oleg Nesterov]

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.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/