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Message-ID: <202007230114.UshEQc4w%lkp@intel.com>
Date: Thu, 23 Jul 2020 01:40:55 +0800
From: kernel test robot <lkp@...el.com>
To: Eelco Chaudron <echaudro@...hat.com>, netdev@...r.kernel.org
Cc: kbuild-all@...ts.01.org, davem@...emloft.net, dev@...nvswitch.org,
kuba@...nel.org, pabeni@...hat.com, pshelar@....org
Subject: Re: [PATCH net-next 2/2] net: openvswitch: make masks cache size
configurable
Hi Eelco,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on net-next/master]
url: https://github.com/0day-ci/linux/commits/Eelco-Chaudron/net-openvswitch-masks-cache-enhancements/20200722-163017
base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git fa56a987449bcf4c1cb68369a187af3515b85c78
config: x86_64-randconfig-s022-20200719 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-14) 9.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.2-49-g707c5017-dirty
# save the attached .config to linux build tree
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
sparse warnings: (new ones prefixed by >>)
>> net/openvswitch/flow_table.c:376:23: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct mask_cache_entry *cache @@ got void [noderef] __percpu * @@
>> net/openvswitch/flow_table.c:376:23: sparse: expected struct mask_cache_entry *cache
>> net/openvswitch/flow_table.c:376:23: sparse: got void [noderef] __percpu *
>> net/openvswitch/flow_table.c:386:25: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct mask_cache_entry [noderef] __percpu *mask_cache @@ got struct mask_cache_entry *cache @@
>> net/openvswitch/flow_table.c:386:25: sparse: expected struct mask_cache_entry [noderef] __percpu *mask_cache
>> net/openvswitch/flow_table.c:386:25: sparse: got struct mask_cache_entry *cache
>> net/openvswitch/flow_table.c:411:27: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct mask_cache [noderef] __rcu *mask_cache @@ got struct mask_cache * @@
>> net/openvswitch/flow_table.c:411:27: sparse: expected struct mask_cache [noderef] __rcu *mask_cache
>> net/openvswitch/flow_table.c:411:27: sparse: got struct mask_cache *
>> net/openvswitch/flow_table.c:440:35: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct mask_cache *mc @@ got struct mask_cache [noderef] __rcu *mask_cache @@
>> net/openvswitch/flow_table.c:440:35: sparse: expected struct mask_cache *mc
>> net/openvswitch/flow_table.c:440:35: sparse: got struct mask_cache [noderef] __rcu *mask_cache
net/openvswitch/flow_table.c:517:24: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct callback_head *head @@ got struct callback_head [noderef] __rcu * @@
net/openvswitch/flow_table.c:517:24: sparse: expected struct callback_head *head
net/openvswitch/flow_table.c:517:24: sparse: got struct callback_head [noderef] __rcu *
net/openvswitch/flow_table.c:518:24: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct callback_head *head @@ got struct callback_head [noderef] __rcu * @@
net/openvswitch/flow_table.c:518:24: sparse: expected struct callback_head *head
net/openvswitch/flow_table.c:518:24: sparse: got struct callback_head [noderef] __rcu *
net/openvswitch/flow_table.c:1166:42: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sw_flow_mask [noderef] __rcu * @@ got struct sw_flow_mask * @@
net/openvswitch/flow_table.c:1166:42: sparse: expected struct sw_flow_mask [noderef] __rcu *
net/openvswitch/flow_table.c:1166:42: sparse: got struct sw_flow_mask *
vim +376 net/openvswitch/flow_table.c
357
358 static struct mask_cache *tbl_mask_cache_alloc(u32 size)
359 {
360 struct mask_cache_entry *cache = NULL;
361 struct mask_cache *new;
362
363 /* Only allow size to be 0, or a power of 2, and does not exceed
364 * percpu allocation size.
365 */
366 if ((size & (size - 1)) != 0 ||
367 (size * sizeof(struct mask_cache_entry)) > PCPU_MIN_UNIT_SIZE)
368 return NULL;
369
370 new = kzalloc(sizeof(*new), GFP_KERNEL);
371 if (!new)
372 return NULL;
373
374 new->cache_size = size;
375 if (new->cache_size > 0) {
> 376 cache = __alloc_percpu(sizeof(struct mask_cache_entry) *
377 new->cache_size,
378 __alignof__(struct mask_cache_entry));
379
380 if (!cache) {
381 kfree(new);
382 return NULL;
383 }
384 }
385
> 386 new->mask_cache = cache;
387 return new;
388 }
389
390 void ovs_flow_tbl_masks_cache_resize(struct flow_table *table, u32 size)
391 {
392 struct mask_cache *mc = rcu_dereference(table->mask_cache);
393 struct mask_cache *new;
394
395 if (size == mc->cache_size || (size & (size - 1)) != 0)
396 return;
397
398 new = tbl_mask_cache_alloc(size);
399 if (!new)
400 return;
401
402 rcu_assign_pointer(table->mask_cache, new);
403 call_rcu(&mc->rcu, mask_cache_rcu_cb);
404 }
405
406 int ovs_flow_tbl_init(struct flow_table *table)
407 {
408 struct table_instance *ti, *ufid_ti;
409 struct mask_array *ma;
410
> 411 table->mask_cache = tbl_mask_cache_alloc(MC_DEFAULT_HASH_ENTRIES);
412 if (!table->mask_cache)
413 return -ENOMEM;
414
415 ma = tbl_mask_array_alloc(MASK_ARRAY_SIZE_MIN);
416 if (!ma)
417 goto free_mask_cache;
418
419 ti = table_instance_alloc(TBL_MIN_BUCKETS);
420 if (!ti)
421 goto free_mask_array;
422
423 ufid_ti = table_instance_alloc(TBL_MIN_BUCKETS);
424 if (!ufid_ti)
425 goto free_ti;
426
427 rcu_assign_pointer(table->ti, ti);
428 rcu_assign_pointer(table->ufid_ti, ufid_ti);
429 rcu_assign_pointer(table->mask_array, ma);
430 table->last_rehash = jiffies;
431 table->count = 0;
432 table->ufid_count = 0;
433 return 0;
434
435 free_ti:
436 __table_instance_destroy(ti);
437 free_mask_array:
438 __mask_array_destroy(ma);
439 free_mask_cache:
> 440 __mask_cache_destroy(table->mask_cache);
441 return -ENOMEM;
442 }
443
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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