Can we put this in a common header somewhere?
Andrew Morton wrote:
>On Wed, 25 Sep 2013 02:30:51 +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
>> hotplugg
On Wed, 25 Sep 2013 02:30:51 +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.
>
> In a memory hotplug system, any numa node t
On 09/26/2013 10:48 PM, Tejun Heo wrote:
> Hello,
>
> On Wed, Sep 25, 2013 at 02:30:51AM +0800, Zhang Yanfei wrote:
>> +/**
>> + * memory_map_bottom_up - Map [map_start, map_end) bottom up
>> + * @map_start: start address of the target memory range
>> + * @map_end: end address of the target memory
On Fri, Sep 27, 2013 at 12:03:01AM +0800, Zhang Yanfei wrote:
> Ah, I see. You are saying another issue. He is worrying that if we use
> kexec to load the kernel high, say we have 16GB, we put the kernel in
> 15.99GB (just an example), so we only have less than 100MB above the kernel.
>
> But as I
On 09/26/2013 11:48 PM, Tejun Heo wrote:
> On Thu, Sep 26, 2013 at 11:43:02PM +0800, Zhang Yanfei wrote:
>>> As Yinghai pointed out in another thread, do we need to worry about
>>> falling back to top-down?
>>
>> I've explained to him. Nop, we don't need to worry about that. Because even
>> the min
On Thu, Sep 26, 2013 at 11:43:02PM +0800, Zhang Yanfei wrote:
> > As Yinghai pointed out in another thread, do we need to worry about
> > falling back to top-down?
>
> I've explained to him. Nop, we don't need to worry about that. Because even
> the min_pfn_mapped becomes ISA_END_ADDRESS in the se
Hello tejun,
On 09/26/2013 10:48 PM, Tejun Heo wrote:
> Hello,
>
> On Wed, Sep 25, 2013 at 02:30:51AM +0800, Zhang Yanfei wrote:
>> +/**
>> + * memory_map_bottom_up - Map [map_start, map_end) bottom up
>> + * @map_start: start address of the target memory range
>> + * @map_end: end address of the
Hello,
On Wed, Sep 25, 2013 at 02:30:51AM +0800, Zhang Yanfei wrote:
> +/**
> + * memory_map_bottom_up - Map [map_start, map_end) bottom up
> + * @map_start: start address of the target memory range
> + * @map_end: end address of the target memory range
> + *
> + * This function will setup direct
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.
In a memory hotplug system, any numa node the kernel resides in
should be unhotpluggable. And for a modern server,
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