Merge pull request #6280 from hppritcha/topic/mpool_comp_fix_v40x

Update mpool_hugepage_component.c

opal/mca/mpool/hugepage/mpool_hugepage_component.c

@@ -264,12 +264,17 @@ static void mca_mpool_hugepage_find_hugepages (void) {
 
         hp->path = strdup (mntent->mnt_dir);
         hp->page_size = page_size;
-
-        OPAL_OUTPUT_VERBOSE((MCA_BASE_VERBOSE_INFO, opal_mpool_base_framework.framework_output,
-                             "found huge page with size = %lu, path = %s, mmap flags = 0x%x",
-                             hp->page_size, hp->path, hp->mmap_flags));
-
-        opal_list_append (&mca_mpool_hugepage_component.huge_pages, &hp->super);
+        
+        if(0 == access (hp->path, R_OK | W_OK)){        
+            opal_output_verbose (MCA_BASE_VERBOSE_INFO, opal_mpool_base_framework.framework_output,
+                                 "found huge page with size = %lu, path = %s, mmap flags = 0x%x, adding to list",
+                                 hp->page_size, hp->path, hp->mmap_flags);
+            opal_list_append (&mca_mpool_hugepage_component.huge_pages, &hp->super);
+        } else {
+            opal_output_verbose (MCA_BASE_VERBOSE_INFO, opal_mpool_base_framework.framework_output,
+                                 "found huge page with size = %lu, path = %s, mmap flags = 0x%x, with invalid " 
+                                 "permissions, skipping", hp->page_size, hp->path, hp->mmap_flags);
+        }        
     }
 
     opal_list_sort (&mca_mpool_hugepage_component.huge_pages, page_compare);