Re: [RFC][PATCH 0/3] big chunk memory allocator v2

KAMEZAWA Hiroyuki
2010-10-29T11:04:46Z

On Fri, 29 Oct 2010 12:31:54 +0200
Andi Kleen <andi.kleen@intel.com> wrote:

> > When I was posting CMA, it had been suggested to create a new migration type
> > dedicated to contiguous allocations. I think I already did that and thanks to
> > this new migration type we have (i) an area of memory that only accepts movable
> > and reclaimable pages and
>
> Aka highmem next generation :-(
>

yes. But Nick's new shrink_slab() may be a new help even without
new zone.

> > (ii) is used only if all other (non-reserved) pages have
> > been allocated.
>
> That will be near always the case after some uptime, as memory fills up
> with caches. Unless you do early reclaim?
>

memory migration always do work with alloc_page() for getting migration target
pages. So, memory will be reclaimed if filled by cache.

About my patch, I may have to prealloc all required pages before start.
But I didn't do that at this time.

Thanks,
-Kame