Re: page migration patchset

[William Lee Irwin III <wli@holomorphy.com>]

Andi Kleen wrote:
>> You need lazy hugetlbfs to use it (= allocate at page fault time,
>> not mmap time). Otherwise the policy can never be applied. I implemented 
>> my own version of lazy allocation for SLES9, but when I wanted to 
>> merge it into mainline some other people told they had a much better 
>> singing&dancing lazy hugetlb patch. So I waited for them, but they 
>> never went forward with their stuff and their code seems to be dead
>> now. So this is still a dangling end :/
>> If nothing happens soon regarding the "other" hugetlb code I will
>> forward port my SLES9 code. It already has NUMA policy support.
>> For now you can remove the hugetlb policy code from mainline if you
>> want, it would be easy to readd it when lazy hugetlbfs is merged.

On Thu, Jan 06, 2005 at 03:43:39PM -0800, Steve Longerbeam wrote:
> if you don't mind I'd like to. Sounds as if lazy hugetlbfs would be
> able to make use of the generic file mapping->policy instead of a
> hugetlb-specific policy anyway. Same goes for shmem.

If Andi's comments refer to my work, it already got permavetoed.

Anyway, using the vma's is a minor change. Please include this as a
patch separate from other changes (fault handling, consolidations, etc.)


-- wli