9/29/2016 find_get_page_readonly checks SCHED_LITMUS

1 files changed, 6 insertions, 0 deletions

diff --git a/litmus/litmus.c b/litmus/litmus.c
index f88cd16ab86d..d31138c9b9a6 100644
--- a/litmus/litmus.c
+++ b/litmus/litmus.c
@@ -571,6 +571,12 @@ asmlinkage long sys_set_page_color(int cpu)
                                 put_page(old_page);
                                 continue;
                         }
+                        
+                        if (page_count(old_page) - page_mapcount(old_page) == 1) {
+                                put_page(old_page);
+                                continue;
+                        }
+                        
                         TRACE_TASK(current, "addr: %08x, pfn: %ld, _mapcount: %d, _count: %d\n", vma_itr->vm_start + PAGE_SIZE*i, __page_to_pfn(old_page), page_mapcount(old_page), page_count(old_page));
                         put_page(old_page);
                 }