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authorMel Gorman <mgorman@suse.de>2012-11-19 12:35:47 +0000
committerMel Gorman <mgorman@suse.de>2012-12-11 14:42:57 +0000
commitb32967ff101a7508f70be8de59b278d4df92fa00 (patch)
treeb106d5eea06f97d0174f483d6a05a8b7ddd64154 /mm/internal.h
parent5bca23035391928c4c7301835accca3551b96cc2 (diff)
mm: numa: Add THP migration for the NUMA working set scanning fault case.
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. [dhillf@gmail.com: Fix memory leak on isolation failure] [dhillf@gmail.com: Fix transfer of last_nid information] Signed-off-by: Mel Gorman <mgorman@suse.de>
Diffstat (limited to 'mm/internal.h')
-rw-r--r--mm/internal.h7
1 files changed, 5 insertions, 2 deletions
diff --git a/mm/internal.h b/mm/internal.h
index a4fa284f6bc2..7e60ac826f2b 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -212,15 +212,18 @@ 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);
}
}
+extern pmd_t maybe_pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma);
+
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
extern unsigned long vma_address(struct page *page,
struct vm_area_struct *vma);