khugepaged vma merge

register in khugepaged if the vma grows.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/mm/mmap.c b/mm/mmap.c
index 3ef4e5370dd5..fdada17ae76b 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -28,6 +28,7 @@
 #include <linux/rmap.h>
 #include <linux/mmu_notifier.h>
 #include <linux/perf_event.h>
+#include <linux/khugepaged.h>
 
 #include <asm/uaccess.h>
 #include <asm/cacheflush.h>
@@ -806,6 +807,7 @@ struct vm_area_struct *vma_merge(struct mm_struct *mm,
 				end, prev->vm_pgoff, NULL);
 		if (err)
 			return NULL;
+		khugepaged_enter_vma_merge(prev);
 		return prev;
 	}
 
@@ -824,6 +826,7 @@ struct vm_area_struct *vma_merge(struct mm_struct *mm,
 				next->vm_pgoff - pglen, NULL);
 		if (err)
 			return NULL;
+		khugepaged_enter_vma_merge(area);
 		return area;
 	}
 
@@ -1752,6 +1755,7 @@ int expand_upwards(struct vm_area_struct *vma, unsigned long address)
 			vma->vm_end = address;
 	}
 	vma_unlock_anon_vma(vma);
+	khugepaged_enter_vma_merge(vma);
 	return error;
 }
 #endif /* CONFIG_STACK_GROWSUP || CONFIG_IA64 */
@@ -1798,6 +1802,7 @@ static int expand_downwards(struct vm_area_struct *vma,
 		}
 	}
 	vma_unlock_anon_vma(vma);
+	khugepaged_enter_vma_merge(vma);
 	return error;
 }