Hello,
On Wed, Sep 25, 2013 at 02:27:48AM +0800, Zhang Yanfei wrote:
> +#ifdef CONFIG_MOVABLE_NODE
> +static inline void memblock_set_bottom_up(bool enable)
> +{
> + memblock.bottom_up = enable;
> +}
> +
> +static inline bool memblock_bottom_up(void)
> +{
> + return memblock.bottom_up;
> +}
Can you please explain what this is for here?
> + /*
> + * we always limit bottom-up allocation above the kernel,
> + * but top-down allocation doesn't have the limit, so
> + * retrying top-down allocation may succeed when bottom-up
> + * allocation failed.
> + *
> + * bottom-up allocation is expected to be fail very rarely,
> + * so we use WARN_ONCE() here to see the stack trace if
> + * fail happens.
> + */
> + WARN_ONCE(1, "memblock: Failed to allocate memory in bottom up "
> + "direction. Now try top down direction.\n");
> + }
You and I would know what was going on and what the consequence of the
failure may be but the above warning message is kinda useless to a
user / admin, right? It doesn't really say anything meaningful.
Thanks.
--
tejun
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