Hi Dmitry, I love your patch! Perhaps something to improve: [auto build test WARNING on next-20220411] [cannot apply to drm/drm-next v5.18-rc2 v5.18-rc1 v5.17 v5.18-rc2] [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/intel-lab-lkp/linux/commits/Dmitry-Osipenko/Add-generic-memory-shrinker-to-VirtIO-GPU-and-Panfrost-DRM-drivers/20220412-060325 base: d12d7e1cfe38e0c36d28c7a9fbbc436ad0d17c14 config: arc-buildonly-randconfig-r002-20220411 (https://download.01.org/0day-ci/archive/20220412/202204121135.zXHzC28U-lkp@xxxxxxxxx/config) compiler: arc-elf-gcc (GCC) 11.2.0 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/intel-lab-lkp/linux/commit/683ba8a9d72ba7770a61a9266a2b33949f3874f2 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Dmitry-Osipenko/Add-generic-memory-shrinker-to-VirtIO-GPU-and-Panfrost-DRM-drivers/20220412-060325 git checkout 683ba8a9d72ba7770a61a9266a2b33949f3874f2 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash drivers/gpu/drm/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): drivers/gpu/drm/drm_gem_shmem_helper.c: In function 'drm_gem_shmem_shrinker_run_objects_scan': >> drivers/gpu/drm/drm_gem_shmem_helper.c:1358:56: warning: implicit conversion from 'enum <anonymous>' to 'enum dma_resv_usage' [-Wenum-conversion] 1358 | if (!dma_resv_test_signaled(obj->resv, true)) | ^~~~ vim +1358 drivers/gpu/drm/drm_gem_shmem_helper.c 1299 1300 static unsigned long 1301 drm_gem_shmem_shrinker_run_objects_scan(struct shrinker *shrinker, 1302 unsigned long nr_to_scan, 1303 bool *lock_contention, 1304 bool evict) 1305 { 1306 struct drm_gem_shmem_shrinker *gem_shrinker = to_drm_shrinker(shrinker); 1307 struct drm_gem_shmem_object *shmem; 1308 struct list_head still_in_list; 1309 struct drm_gem_object *obj; 1310 unsigned long freed = 0; 1311 struct list_head *lru; 1312 size_t page_count; 1313 1314 INIT_LIST_HEAD(&still_in_list); 1315 1316 mutex_lock(&gem_shrinker->lock); 1317 1318 if (evict) 1319 lru = &gem_shrinker->lru_evictable; 1320 else 1321 lru = &gem_shrinker->lru_purgeable; 1322 1323 while (freed < nr_to_scan) { 1324 shmem = list_first_entry_or_null(lru, typeof(*shmem), madv_list); 1325 if (!shmem) 1326 break; 1327 1328 obj = &shmem->base; 1329 page_count = obj->size >> PAGE_SHIFT; 1330 list_move_tail(&shmem->madv_list, &still_in_list); 1331 1332 if (evict && get_nr_swap_pages() < page_count) 1333 continue; 1334 1335 /* 1336 * If it's in the process of being freed, gem_object->free() 1337 * may be blocked on lock waiting to remove it. So just 1338 * skip it. 1339 */ 1340 if (!kref_get_unless_zero(&obj->refcount)) 1341 continue; 1342 1343 mutex_unlock(&gem_shrinker->lock); 1344 1345 /* prevent racing with job-submission code paths */ 1346 if (!dma_resv_trylock(obj->resv)) { 1347 *lock_contention |= true; 1348 goto shrinker_lock; 1349 } 1350 1351 /* prevent racing with the dma-buf exporting */ 1352 if (!mutex_trylock(&gem_shrinker->dev->object_name_lock)) { 1353 *lock_contention |= true; 1354 goto resv_unlock; 1355 } 1356 1357 /* check whether h/w uses this object */ > 1358 if (!dma_resv_test_signaled(obj->resv, true)) 1359 goto object_name_unlock; 1360 1361 /* GEM may've become unpurgeable while shrinker was unlocked */ 1362 if (evict) { 1363 if (!drm_gem_shmem_is_evictable(shmem)) 1364 goto object_name_unlock; 1365 } else { 1366 if (!drm_gem_shmem_is_purgeable(shmem)) 1367 goto object_name_unlock; 1368 } 1369 1370 if (evict) 1371 freed += obj->funcs->evict(obj); 1372 else 1373 freed += obj->funcs->purge(obj); 1374 object_name_unlock: 1375 mutex_unlock(&gem_shrinker->dev->object_name_lock); 1376 resv_unlock: 1377 dma_resv_unlock(obj->resv); 1378 shrinker_lock: 1379 drm_gem_object_put(&shmem->base); 1380 mutex_lock(&gem_shrinker->lock); 1381 } 1382 1383 list_splice_tail(&still_in_list, lru); 1384 1385 mutex_unlock(&gem_shrinker->lock); 1386 1387 return freed; 1388 } 1389 -- 0-DAY CI Kernel Test Service https://01.org/lkp
