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Message-ID: <202202271324.VLaJlMYW-lkp@intel.com>
Date: Sun, 27 Feb 2022 13:06:01 +0800
From: kernel test robot <lkp@...el.com>
To: Hyeonggon Yoo <42.hyeyoo@...il.com>,
Vlastimil Babka <vbabka@...e.cz>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
David Rientjes <rientjes@...gle.com>,
Christoph Lameter <cl@...ux-foundation.org>,
Joonsoo Kim <iamjoonsoo.kim@....com>,
Pekka Enberg <penberg@...nel.org>,
Roman Gushchin <roman.gushchin@...ux.dev>,
Andrew Morton <akpm@...ux-foundation.org>,
Linux Memory Management List <linux-mm@...ck.org>,
patches@...ts.linux.dev, linux-kernel@...r.kernel.org,
Oliver Glitta <glittao@...il.com>,
Faiyaz Mohammed <faiyazm@...eaurora.org>,
Dmitry Vyukov <dvyukov@...gle.com>,
Eric Dumazet <edumazet@...gle.com>,
Jarkko Sakkinen <jarkko@...nel.org>,
Johannes Berg <johannes.berg@...el.com>,
Yury Norov <yury.norov@...il.com>,
Arnd Bergmann <arnd@...db.de>,
James Bottomley <James.Bottomley@...senpartnership.com>,
Matteo Croce <mcroce@...rosoft.com>,
Marco Elver <elver@...gle.com>,
Andrey Konovalov <andreyknvl@...il.com>,
Imran Khan <imran.f.khan@...cle.com>,
Zqiang <qiang.zhang@...driver.com>,
Hyeonggon Yoo <42.hyeyoo@...il.com>
Subject: Re: [PATCH] lib/stackdepot: Use page allocator if both slab and
memblock is unavailable
Hi Hyeonggon,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on linus/master]
[also build test WARNING on v5.17-rc5 next-20220225]
[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/Hyeonggon-Yoo/lib-stackdepot-Use-page-allocator-if-both-slab-and-memblock-is-unavailable/20220227-111029
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 2293be58d6a18cab800e25e42081bacb75c05752
config: hexagon-randconfig-r005-20220227 (https://download.01.org/0day-ci/archive/20220227/202202271324.VLaJlMYW-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e)
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
# https://github.com/0day-ci/linux/commit/fd37f88eccc357002cc03a6a5fac60fb42552bc7
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Hyeonggon-Yoo/lib-stackdepot-Use-page-allocator-if-both-slab-and-memblock-is-unavailable/20220227-111029
git checkout fd37f88eccc357002cc03a6a5fac60fb42552bc7
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
>> lib/stackdepot.c:187:11: warning: comparison of distinct pointer types ('typeof (size) *' (aka 'unsigned int *') and 'typeof ((1UL << 14) << (11 - 1)) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types]
size = min(size, PAGE_SIZE << (MAX_ORDER - 1));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:45:19: note: expanded from macro 'min'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~~~~~~~
include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~~~~~~~
include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
1 warning generated.
vim +187 lib/stackdepot.c
168
169 /*
170 * __ref because of memblock_alloc(), which will not be actually called after
171 * the __init code is gone, because at that point slab_is_available() is true
172 */
173 __ref int stack_depot_init(void)
174 {
175 static DEFINE_MUTEX(stack_depot_init_mutex);
176
177 mutex_lock(&stack_depot_init_mutex);
178 if (!stack_depot_disable && !stack_table) {
179 size_t size = (stack_hash_size * sizeof(struct stack_record *));
180 int i;
181
182 if (slab_is_available()) {
183 pr_info("Stack Depot allocating hash table with kvmalloc\n");
184 stack_table = kvmalloc(size, GFP_KERNEL);
185 } else if (totalram_pages() > 0) {
186 /* Reduce size because vmalloc may be unavailable */
> 187 size = min(size, PAGE_SIZE << (MAX_ORDER - 1));
188 stack_hash_size = size / sizeof(struct stack_record *);
189
190 pr_info("Stack Depot allocating hash table with __get_free_pages\n");
191 stack_table = (struct stack_record **)
192 __get_free_pages(GFP_KERNEL, get_order(size));
193 } else {
194 pr_info("Stack Depot allocating hash table with memblock_alloc\n");
195 stack_table = memblock_alloc(size, SMP_CACHE_BYTES);
196 }
197
198 if (stack_table) {
199 pr_info("Stack Depot hash table size=%u\n", stack_hash_size);
200 for (i = 0; i < stack_hash_size; i++)
201 stack_table[i] = NULL;
202 } else {
203 pr_err("Stack Depot hash table allocation failed, disabling\n");
204 stack_depot_disable = true;
205 mutex_unlock(&stack_depot_init_mutex);
206 return -ENOMEM;
207 }
208 }
209 mutex_unlock(&stack_depot_init_mutex);
210 return 0;
211 }
212 EXPORT_SYMBOL_GPL(stack_depot_init);
213
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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