Hi Yinghai,
(Add cc Liu Jiang.)
On 04/09/2013 02:40 AM, Yinghai Lu wrote:
On Mon, Apr 8, 2013 at 2:56 AM, Lin Feng<linfeng@xxxxxxxxxxxxxx> wrote:
In hot add node(memory) case, vmemmap pages are always allocated from other
node,
that is broken, and should be fixed.
vmemmap should be on local node even for hot add node.
I want some info sharing. :)
Here is the work I'm trying to do.
1. As most of people don't like movablemem_map idea, we decide to
drop "specifying physical address" thing, and restart a new solution
to support using SRAT info only.
We want to modify movablecore to support "movablecore=acpi" to
enable/disable limiting hotpluggable memory in ZONE_MOVABLE.
And we dropped all the old design and data structures.
2. As Liu Jiang mentioned before, we can add a flag to memblock to mark
special memory. Since we are dropping all the old data structures,
I think I want to reuse his idea to reserve movable memory with memblock
when booting.
3. If we add flag to memblock, we can mark different memory. And I remember
you mentioned before that we can use memblock to reserve local node
data
for node-life-cycle data, like vmemmap, pagetable.
So are you doing the similar work now ?
If not, I think I can merge it into mine, and push a new patch-set with
hot-add, hot-remove code modified to support putting vmemmap,
pagetable,
pgdat, page_cgroup, ..., on local node.
If you are doing the similar work, I will only finish my work and wait
for your patch.
Thanks. :)
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