Hello,
On Mon, Sep 09, 2013 at 07:56:34PM +0800, Wanpeng Li wrote:
> If allocate from low to high as what this patchset done will occupy the
> precious memory you mentioned?
Yeah, and that'd be the reason why this behavior is dependent on a
kernel option. That said, allocating some megs on top o
Specifically there are a bunch of things which need to be below a certain
address (which one varies.)
Tejun Heo wrote:
>Hello, Wanpeng.
>
>On Fri, Sep 06, 2013 at 04:58:11PM +0800, Wanpeng Li wrote:
>> What's the root reason memblock alloc from high to low? To reduce
>> fragmentation or ...
>
>
Hello, Wanpeng.
On Fri, Sep 06, 2013 at 04:58:11PM +0800, Wanpeng Li wrote:
> What's the root reason memblock alloc from high to low? To reduce
> fragmentation or ...
Because low memory tends to be more precious, it's just easier to pack
everything towards the top so that we don't have to worry
Hi tj,
On 09/05/2013 03:22 AM, Tejun Heo wrote:
..
I'm expectedly happier with this approach but some overall review
points.
* I think patch splitting went a bit too far. e.g. it doesn't make
much sense or helps anything to split "introduction of a param" from
"the param doing someth
Hello,
On Tue, Aug 27, 2013 at 05:37:37PM +0800, Tang Chen wrote:
> 1. Make memblock be able to allocate memory from low address to high address.
>Also introduce low limit to prevent memblock allocating memory too low.
>
> 2. Improve init_mem_mapping() to support allocate page tables from low
Hi guys,
Any comment to this patch-set ? And shall agree on using this solution
suggested by Tejun ?
Thanks.
On 08/27/2013 05:37 PM, Tang Chen wrote:
This patch-set is based on tj's suggestion, and not fully tested.
Just for review and discussion.
[Problem]
The current Linux cannot migrate
Hi Wanpeng,
On 08/29/2013 09:36 AM, Wanpeng Li wrote:
..
Hi tj,
Sorry for the trouble. Please refer to the following branch:
https://github.com/imtangchen/linux.git movablenode-boot-option
Could you post your testcase? So I can test it on x86 and powerpc machines.
Sure. Some simple
On 08/28/2013 11:19 PM, Tejun Heo wrote:
..
Doesn't apply to -master, -next or tip. Again, can you please include
which tree and git commit the patches are against in the patch
description? How is one supposed to know on top of which tree you're
working? It is in your benefit to make thing
On Tue, Aug 27, 2013 at 05:37:37PM +0800, Tang Chen wrote:
> Tang Chen (11):
> memblock: Rename current_limit to current_limit_high in memblock.
> memblock: Rename memblock_set_current_limit() to
> memblock_set_current_limit_high().
> memblock: Introduce lowest limit in memblock.
> memb
Hi Wanpeng
On 08/28/2013 04:03 PM, Wanpeng Li wrote:
Hi Tang,
..
[About this patch-set]
So this patch-set does the following:
1. Make memblock be able to allocate memory from low address to high address.
I want to know if there is fragmentation degree difference here?
Before this pa
This patch-set is based on tj's suggestion, and not fully tested.
Just for review and discussion.
[Problem]
The current Linux cannot migrate pages used by the kerenl because
of the kernel direct mapping. In Linux kernel space, va = pa + PAGE_OFFSET.
When the pa is changed, we cannot simply upda
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