On Wed, 2013-09-25 at 02:27 +0800, Zhang Yanfei wrote:
> From: Tang Chen
>
> The Linux kernel cannot migrate pages used by the kernel. As a result, kernel
> pages cannot be hot-removed. So we cannot allocate hotpluggable memory for
> the kernel.
>
> ACPI SRAT (System Resource Affinity Table) con
On 09/26/2013 11:37 PM, Zhang Yanfei wrote:
> Hello tejun,
>
> Thanks for your quick comments first:)
>
> On 09/26/2013 10:45 PM, Tejun Heo wrote:
>> Hello,
>>
>> On Wed, Sep 25, 2013 at 02:27:48AM +0800, Zhang Yanfei wrote:
>>> +#ifdef CONFIG_MOVABLE_NODE
>>> +static inline void memblock_set_bot
On 09/26/2013 11:50 PM, Tejun Heo wrote:
> On Thu, Sep 26, 2013 at 11:37:34PM +0800, Zhang Yanfei wrote:
+ WARN_ONCE(1, "memblock: Failed to allocate memory in bottom up "
+ "direction. Now try top down direction.\n");
+ }
>>>
>>> You and I would know what
On Thu, Sep 26, 2013 at 11:37:34PM +0800, Zhang Yanfei wrote:
> >> + 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 t
Hello tejun,
Thanks for your quick comments first:)
On 09/26/2013 10:45 PM, Tejun Heo wrote:
> 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 = ena
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;
> +
From: Tang Chen
The Linux kernel cannot migrate pages used by the kernel. As a result, kernel
pages cannot be hot-removed. So we cannot allocate hotpluggable memory for
the kernel.
ACPI SRAT (System Resource Affinity Table) contains the memory hotplug info.
But before SRAT is parsed, memblock ha
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