Hi Yang, [auto build test ERROR on mmotm/master] [also build test ERROR on v4.14-rc3 next-20170929] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Yang-Shi/oom-capture-unreclaimable-slab-info-in-oom-message/20171007-173639 base: git://git.cmpxchg.org/linux-mmotm.git master config: h8300-h8300h-sim_defconfig (attached as .config) compiler: h8300-linux-gcc (GCC) 6.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=h8300 All errors (new ones prefixed by >>): mm/slab_common.o: In function `dump_unreclaimable_slab': >> mm/slab_common.c:1298: undefined reference to `get_slabinfo' vim +1298 mm/slab_common.c 1272 1273 void dump_unreclaimable_slab(void) 1274 { 1275 struct kmem_cache *s, *s2; 1276 struct slabinfo sinfo; 1277 1278 /* 1279 * Here acquiring slab_mutex is risky since we don't prefer to get 1280 * sleep in oom path. But, without mutex hold, it may introduce a 1281 * risk of crash. 1282 * Use mutex_trylock to protect the list traverse, dump nothing 1283 * without acquiring the mutex. 1284 */ 1285 if (!mutex_trylock(&slab_mutex)) { 1286 pr_warn("excessive unreclaimable slab but cannot dump stats\n"); 1287 return; 1288 } 1289 1290 pr_info("Unreclaimable slab info:\n"); 1291 pr_info("Name Used Total\n"); 1292 1293 list_for_each_entry_safe(s, s2, &slab_caches, list) { 1294 if (!is_root_cache(s) || (s->flags & SLAB_RECLAIM_ACCOUNT)) 1295 continue; 1296 1297 memset(&sinfo, 0, sizeof(sinfo)); > 1298 get_slabinfo(s, &sinfo); 1299 1300 if (sinfo.num_objs > 0) 1301 pr_info("%-17s %10luKB %10luKB\n", cache_name(s), 1302 (sinfo.active_objs * s->size) / 1024, 1303 (sinfo.num_objs * s->size) / 1024); 1304 } 1305 mutex_unlock(&slab_mutex); 1306 } 1307 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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