On Mon, 11 Sep 2017, Vlastimil Babka wrote:
> > Yes, any page where compound_order(page) == pageblock_order would probably
> > benefit from the same treatment. I haven't encountered such an issue,
> > however, so I thought it was best to restrict it only to hugetlb: hugetlb
> > memory usually
On 09/11/2017 03:12 AM, David Rientjes wrote:
> On Wed, 23 Aug 2017, Vlastimil Babka wrote:
>
>>> diff --git a/mm/compaction.c b/mm/compaction.c
>>> --- a/mm/compaction.c
>>> +++ b/mm/compaction.c
>>> @@ -217,6 +217,20 @@ static void reset_cached_positions(struct zone *zone)
>>>
On Fri, 1 Sep 2017, Vlastimil Babka wrote:
> The pageblock_skip_persistent() function checks for HugeTLB pages of pageblock
> order. When clearing pageblock skip bits for compaction, the bits are not
> cleared for such pageblocks, because they cannot contain base pages suitable
> for migration, no
On Wed, 23 Aug 2017, Vlastimil Babka wrote:
> > diff --git a/mm/compaction.c b/mm/compaction.c
> > --- a/mm/compaction.c
> > +++ b/mm/compaction.c
> > @@ -217,6 +217,20 @@ static void reset_cached_positions(struct zone *zone)
> > pageblock_start_pfn(zone_end_pfn(zone) -
On 08/23/2017 10:41 AM, Vlastimil Babka wrote:
> On 08/16/2017 01:39 AM, David Rientjes wrote:
>> It is pointless to migrate hugetlb memory as part of memory compaction if
>> the hugetlb size is equal to the pageblock order. No defragmentation is
>> occurring in this condition.
>>
>> It is also po
On 08/16/2017 01:39 AM, David Rientjes wrote:
> It is pointless to migrate hugetlb memory as part of memory compaction if
> the hugetlb size is equal to the pageblock order. No defragmentation is
> occurring in this condition.
>
> It is also pointless to for the freeing scanner to scan a pagebloc
I am getting
mm/compaction.c: In function 'isolate_freepages_block':
mm/compaction.c:469:4: error: implicit declaration of function
'pageblock_skip_persistent' [-Werror=implicit-function-declaration]
if (pageblock_skip_persistent(page, order)) {
^
mm/compaction.c:470:5: error: implicit de
It is pointless to migrate hugetlb memory as part of memory compaction if
the hugetlb size is equal to the pageblock order. No defragmentation is
occurring in this condition.
It is also pointless to for the freeing scanner to scan a pageblock where
a hugetlb page is pinned. Unconditionally skip
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