mm/khugepaged: add missed tracepoint for collapse_huge_page_swapin

One return case of `__collapse_huge_page_swapin()` does not invoke tracepoint while every other return case does. This commit adds a tracepoint invocation for the case. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: SeongJae Park <[email protected]> Cc: Kirill A. Shutemov <[email protected]> Cc: Johannes Weiner <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
niw · May 12, 2017 · 835152a · 835152a
1 parent 0538421
commit 835152a
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
@@ -907,8 +907,10 @@ static bool __collapse_huge_page_swapin(struct mm_struct *mm,
 				return false;
 			}
 			/* check if the pmd is still valid */
-			if (mm_find_pmd(mm, address) != pmd)
+			if (mm_find_pmd(mm, address) != pmd) {
+				trace_mm_collapse_huge_page_swapin(mm, swapped_in, referenced, 0);
 				return false;
+			}
 		}
 		if (ret & VM_FAULT_ERROR) {
 			trace_mm_collapse_huge_page_swapin(mm, swapped_in, referenced, 0);