On Wed, Nov 21, 2012 at 10:21:43AM +0000, Mel Gorman wrote:
> Note: This is very heavily based on a patch from Peter Zijlstra with
> fixes from Ingo Molnar, Hugh Dickins and Johannes Weiner. That patch
> put a lot of migration logic into mm/huge_memory.c where it does
> not belong. This version puts tries to share some of the migration
> logic with migrate_misplaced_page. However, it should be noted
> that now migrate.c is doing more with the pagetable manipulation
> than is preferred. The end result is barely recognisable so as
> before, the signed-offs had to be removed but will be re-added if
> the original authors are ok with it.
>
> Add THP migration for the NUMA working set scanning fault case.
>
> It uses the page lock to serialize. No migration pte dance is
> necessary because the pte is already unmapped when we decide
> to migrate.
>
> Signed-off-by: Mel Gorman <mgor...@suse.de>
I think these are the obvious missing bits for memcg.
diff --git a/mm/internal.h b/mm/internal.h
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -212,11 +212,12 @@ static inline void mlock_migrate_page(struct page
*newpage, struct page *page)
{
if (TestClearPageMlocked(page)) {
unsigned long flags;
+ int nr_pages = hpage_nr_pages(page);
local_irq_save(flags);
- __dec_zone_page_state(page, NR_MLOCK);
+ __mod_zone_page_state(page_zone(page), NR_MLOCK, -nr_pages);
SetPageMlocked(newpage);
- __inc_zone_page_state(newpage, NR_MLOCK);
+ __mod_zone_page_state(page_zone(newpage), NR_MLOCK, nr_pages);
local_irq_restore(flags);
}
}
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3288,15 +3288,18 @@ void mem_cgroup_prepare_migration(struct page *page,
struct page *newpage,
struct mem_cgroup **memcgp)
{
struct mem_cgroup *memcg = NULL;
+ unsigned int nr_pages = 1;
struct page_cgroup *pc;
enum charge_type ctype;
*memcgp = NULL;
- VM_BUG_ON(PageTransHuge(page));
if (mem_cgroup_disabled())
return;
+ if (PageTransHuge(page))
+ nr_pages <<= compound_order(page);
+
pc = lookup_page_cgroup(page);
lock_page_cgroup(pc);
if (PageCgroupUsed(pc)) {
@@ -3358,7 +3361,7 @@ void mem_cgroup_prepare_migration(struct page *page,
struct page *newpage,
* charged to the res_counter since we plan on replacing the
* old one and only one page is going to be left afterwards.
*/
- __mem_cgroup_commit_charge(memcg, newpage, 1, ctype, false);
+ __mem_cgroup_commit_charge(memcg, newpage, nr_pages, ctype, false);
}
/* remove redundant charge if migration failed*/
--
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