tree: yhuang/random-r0.2-all head: 4dc9ebb4880415aa517cbfa02ccb3e630c9328fc commit: 6da469dc4ed8417b53535ce7772aa30754a57dd2 [45/46] migrate_balanced_pgdat: Use zone_watermark_ok_safe() config: x86_64-rhel-7.2-aep (attached as .config) compiler: gcc-7 (Debian 7.4.0-13) 7.4.0 reproduce: git checkout 6da469dc4ed8417b53535ce7772aa30754a57dd2 # save the attached .config to linux build tree make ARCH=x86_64 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): mm/migrate.c: In function 'migrate_balanced_pgdat': if (!zone_watermark_ok_safe(zone, order, wmark, ^~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/gfp.h:6:0, from include/linux/mm.h:10, from include/linux/migrate.h:5, from mm/migrate.c:16: include/linux/mmzone.h:849:6: note: declared here bool zone_watermark_ok_safe(struct zone *z, unsigned int order, ^~~~~~~~~~~~~~~~~~~~~~ vim +/zone_watermark_ok_safe +1970 mm/migrate.c 1943 1944 #ifdef CONFIG_NUMA_BALANCING 1945 /* 1946 * Returns true if this is a safe migration target node for misplaced NUMA 1947 * pages. Currently it only checks the watermarks which crude 1948 */ 1949 static bool migrate_balanced_pgdat(struct pglist_data *pgdat, int order) 1950 { 1951 int z; 1952 1953 for (z = pgdat->nr_zones - 1; z >= 0; z--) { 1954 unsigned long wmark; 1955 struct zone *zone = pgdat->node_zones + z; 1956 1957 if (!populated_zone(zone)) 1958 continue; 1959 1960 /* Avoid waking kswapd by allocating pages_to_migrate pages. */ 1961 wmark = high_wmark_pages(zone); 1962 /* 1963 * For hierarchy memory system, kswapd will 1964 * periodically migrate cold pages to slower memory 1965 * node. And the half of the high watermark is used 1966 * to allocate promoted pages. 1967 */ 1968 if (sysctl_numa_balancing_mode & NUMA_BALANCING_HMEM) 1969 wmark = (wmark + low_wmark_pages(zone)) / 2; 1971 ZONE_MOVABLE, 0)) 1972 continue; 1973 return true; 1974 } 1975 return false; 1976 } 1977 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation