Hi Bharata, Thank you for the patch! Yet something to improve: [auto build test ERROR on linux/master] [also build test ERROR on linus/master v5.12-rc6 next-20210401] [cannot apply to hnaz-linux-mm/master] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Bharata-B-Rao/High-kmalloc-32-slab-cache-consumption-with-10k-containers/20210405-135124 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 5e46d1b78a03d52306f21f77a4e4a144b6d31486 config: s390-randconfig-r032-20210405 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 2760a808b9916a2839513b7fd7314a464f52481e) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu # https://github.com/0day-ci/linux/commit/b7ba3522029771bd74c8b6324de9ce20b5a06593 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Bharata-B-Rao/High-kmalloc-32-slab-cache-consumption-with-10k-containers/20210405-135124 git checkout b7ba3522029771bd74c8b6324de9ce20b5a06593 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): In file included from mm/list_lru.c:14: In file included from include/linux/memcontrol.h:22: In file included from include/linux/writeback.h:14: In file included from include/linux/blk-cgroup.h:23: In file included from include/linux/blkdev.h:26: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:80: include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __raw_readb(PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:36:59: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x)) ^ include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16' #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x)) ^ In file included from mm/list_lru.c:14: In file included from include/linux/memcontrol.h:22: In file included from include/linux/writeback.h:14: In file included from include/linux/blk-cgroup.h:23: In file included from include/linux/blkdev.h:26: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:80: include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32' #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x)) ^ In file included from mm/list_lru.c:14: In file included from include/linux/memcontrol.h:22: In file included from include/linux/writeback.h:14: In file included from include/linux/blk-cgroup.h:23: In file included from include/linux/blkdev.h:26: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:80: include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ >> mm/list_lru.c:138:49: error: no member named 'memcg_lrus' in 'struct list_lru_node' memcg_lrus = rcu_dereference_protected(nlru->memcg_lrus, true); ~~~~ ^ include/linux/rcupdate.h:562:31: note: expanded from macro 'rcu_dereference_protected' __rcu_dereference_protected((p), (c), __rcu) ^ include/linux/rcupdate.h:383:12: note: expanded from macro '__rcu_dereference_protected' ((typeof(*p) __force __kernel *)(p)); \ ^ >> mm/list_lru.c:138:49: error: no member named 'memcg_lrus' in 'struct list_lru_node' memcg_lrus = rcu_dereference_protected(nlru->memcg_lrus, true); ~~~~ ^ include/linux/rcupdate.h:562:31: note: expanded from macro 'rcu_dereference_protected' __rcu_dereference_protected((p), (c), __rcu) ^ include/linux/rcupdate.h:383:35: note: expanded from macro '__rcu_dereference_protected' ((typeof(*p) __force __kernel *)(p)); \ ^ >> mm/list_lru.c:138:15: error: assigning to 'struct list_lru_memcg *' from incompatible type 'void' memcg_lrus = rcu_dereference_protected(nlru->memcg_lrus, true); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 12 warnings and 3 errors generated. vim +138 mm/list_lru.c 120 121 bool list_lru_add(struct list_lru *lru, struct list_head *item) 122 { 123 int nid = page_to_nid(virt_to_page(item)); 124 struct list_lru_node *nlru = &lru->node[nid]; 125 struct mem_cgroup *memcg; 126 struct list_lru_one *l; 127 struct list_lru_memcg *memcg_lrus; 128 129 spin_lock(&nlru->lock); 130 if (list_empty(item)) { 131 l = list_lru_from_kmem(nlru, item, &memcg); 132 if (!l) { 133 l = kmalloc(sizeof(struct list_lru_one), GFP_ATOMIC); 134 if (!l) 135 goto out; 136 137 init_one_lru(l); > 138 memcg_lrus = rcu_dereference_protected(nlru->memcg_lrus, true); 139 memcg_lrus->lru[memcg_cache_id(memcg)] = l; 140 } 141 list_add_tail(item, &l->list); 142 /* Set shrinker bit if the first element was added */ 143 if (!l->nr_items++) 144 memcg_set_shrinker_bit(memcg, nid, 145 lru_shrinker_id(lru)); 146 nlru->nr_items++; 147 spin_unlock(&nlru->lock); 148 return true; 149 } 150 out: 151 spin_unlock(&nlru->lock); 152 return false; 153 } 154 EXPORT_SYMBOL_GPL(list_lru_add); 155 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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