Re: [PATCH -rt] update kmap_atomic on !HIGHMEM

[Daniel Walker <dwalker@mvista.com>]

On Wed, 2006-12-27 at 22:25 +0100, Ingo Molnar wrote:
> 
> +void pagefault_disable(void)
> +{
> +       current->pagefault_disabled++;
> +       /*
> +        * make sure to have issued the store before a pagefault
> +        * can hit.
> +        */
> +       barrier();
> +}
> +
> +void pagefault_enable(void)
> +{
> +       /*
> +        * make sure to issue those last loads/stores before enabling
> +        * the pagefault handler again.
> +        */
> +       barrier();
> +       current->pagefault_disabled--;
> +}
> +

I'll test it, but clearly I'm not going to get the same scheduling while
atomic using this change.. So may as well just put it in -rt and see if
something crashes ..

Daniel

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