Re: [RFC PATCH 2/3] mm, compaction: use MIN_COMPACT_COSTLY_PRIORITY everywhere for costly orders

[Mike Kravetz]

On 8/2/19 5:05 AM, Vlastimil Babka wrote:
> 
> On 8/1/19 10:33 PM, Mike Kravetz wrote:
>> On 8/1/19 6:01 AM, Vlastimil Babka wrote:
>>> Could you try testing the patch below instead? It should hopefully
>>> eliminate the stalls. If it makes hugepage allocation give up too early,
>>> we'll know we have to involve __GFP_RETRY_MAYFAIL in allowing the
>>> MIN_COMPACT_PRIORITY priority. Thanks!
>>
>> Thanks.  This patch does eliminate the stalls I was seeing.
>>
>> In my testing, there is little difference in how many hugetlb pages are
>> allocated.  It does not appear to be giving up/failing too early.  But,
>> this is only with __GFP_RETRY_MAYFAIL.  The real concern would with THP
>> requests.  Any suggestions on how to test that?
> 
> Here's the full patch, can you include it in your series?

Yes.  Thank you!

-- 
Mike Kravetz