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Date: Tue, 19 Sep 2017 22:59:48 +0800
From: kbuild test robot <lkp@...el.com>
To: Florian Westphal <fw@...len.de>
Cc: kbuild-all@...org, netdev@...r.kernel.org,
Florian Westphal <fw@...len.de>
Subject: Re: [PATCH net-next 4/4] test_rhashtable: add test case for
rhl_table interface
Hi Florian,
[auto build test WARNING on net-next/master]
url: https://github.com/0day-ci/linux/commits/Florian-Westphal/test_rhashtable-add-test-case-for-rhl-table/20170919-135550
config: x86_64-randconfig-a0-09192105 (attached as .config)
compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64
All warnings (new ones prefixed by >>):
lib/test_rhashtable.c: In function 'test_rhltable':
>> lib/test_rhashtable.c:433: warning: the frame size of 2144 bytes is larger than 2048 bytes
vim +433 lib/test_rhashtable.c
254
255 static int __init test_rhltable(unsigned int entries)
256 {
257 struct test_obj_rhl *rhl_test_objects;
258 unsigned long *obj_in_table;
259 struct rhltable rhlt;
260 unsigned int i, j, k;
261 int ret, err;
262
263 if (entries == 0)
264 entries = 1;
265
266 rhl_test_objects = vzalloc(sizeof(*rhl_test_objects) * entries);
267 if (!rhl_test_objects)
268 return -ENOMEM;
269
270 ret = -ENOMEM;
271 obj_in_table = vzalloc(BITS_TO_LONGS(entries) * sizeof(unsigned long));
272 if (!obj_in_table)
273 goto out_free;
274
275 /* nulls_base not supported in rhlist interface */
276 test_rht_params.nulls_base = 0;
277 err = rhltable_init(&rhlt, &test_rht_params);
278 if (WARN_ON(err))
279 goto out_free;
280
281 k = prandom_u32();
282 ret = 0;
283 for (i = 0; i < entries; i++) {
284 rhl_test_objects[i].value.id = k;
285 err = rhltable_insert(&rhlt, &rhl_test_objects[i].list_node,
286 test_rht_params);
287 if (WARN(err, "error %d on element %d\n", err, i))
288 break;
289 if (err == 0)
290 set_bit(i, obj_in_table);
291 }
292
293 if (err)
294 ret = err;
295
296 pr_info("test %d add/delete pairs into rhlist\n", entries);
297 for (i = 0; i < entries; i++) {
298 struct rhlist_head *h, *pos;
299 struct test_obj_rhl *obj;
300 struct test_obj_val key = {
301 .id = k,
302 };
303 bool found;
304
305 rcu_read_lock();
306 h = rhltable_lookup(&rhlt, &key, test_rht_params);
307 if (WARN(!h, "key not found during iteration %d of %d", i, entries)) {
308 rcu_read_unlock();
309 break;
310 }
311
312 if (i) {
313 j = i - 1;
314 rhl_for_each_entry_rcu(obj, pos, h, list_node) {
315 if (WARN(pos == &rhl_test_objects[j].list_node, "old element found, should be gone"))
316 break;
317 }
318 }
319
320 cond_resched_rcu();
321
322 found = false;
323
324 rhl_for_each_entry_rcu(obj, pos, h, list_node) {
325 if (pos == &rhl_test_objects[i].list_node) {
326 found = true;
327 break;
328 }
329 }
330
331 rcu_read_unlock();
332
333 if (WARN(!found, "element %d not found", i))
334 break;
335
336 err = rhltable_remove(&rhlt, &rhl_test_objects[i].list_node, test_rht_params);
337 WARN(err, "rhltable_remove: err %d for iteration %d\n", err, i);
338 if (err == 0)
339 clear_bit(i, obj_in_table);
340 }
341
342 if (ret == 0 && err)
343 ret = err;
344
345 for (i = 0; i < entries; i++) {
346 WARN(test_bit(i, obj_in_table), "elem %d allegedly still present", i);
347
348 err = rhltable_insert(&rhlt, &rhl_test_objects[i].list_node,
349 test_rht_params);
350 if (WARN(err, "error %d on element %d\n", err, i))
351 break;
352 if (err == 0)
353 set_bit(i, obj_in_table);
354 }
355
356 pr_info("test %d random rhlist add/delete operations\n", entries);
357 for (j = 0; j < entries; j++) {
358 u32 i = prandom_u32_max(entries);
359 u32 prand = prandom_u32();
360
361 cond_resched();
362
363 if (prand == 0)
364 prand = prandom_u32();
365
366 if (prand & 1) {
367 prand >>= 1;
368 continue;
369 }
370
371 err = rhltable_remove(&rhlt, &rhl_test_objects[i].list_node, test_rht_params);
372 if (test_bit(i, obj_in_table)) {
373 clear_bit(i, obj_in_table);
374 if (WARN(err, "cannot remove element at slot %d", i))
375 continue;
376 } else {
377 if (WARN(err != -ENOENT, "removed non-existant element %d, error %d not %d",
378 i, err, -ENOENT))
379 continue;
380 }
381
382 if (prand & 1) {
383 prand >>= 1;
384 continue;
385 }
386
387 err = rhltable_insert(&rhlt, &rhl_test_objects[i].list_node, test_rht_params);
388 if (err == 0) {
389 if (WARN(test_and_set_bit(i, obj_in_table), "succeeded to insert same object %d", i))
390 continue;
391 } else {
392 if (WARN(!test_bit(i, obj_in_table), "failed to insert object %d", i))
393 continue;
394 }
395
396 if (prand & 1) {
397 prand >>= 1;
398 continue;
399 }
400
401 i = prandom_u32_max(entries);
402 if (test_bit(i, obj_in_table)) {
403 err = rhltable_remove(&rhlt, &rhl_test_objects[i].list_node, test_rht_params);
404 WARN(err, "cannot remove element at slot %d", i);
405 if (err == 0)
406 clear_bit(i, obj_in_table);
407 } else {
408 err = rhltable_insert(&rhlt, &rhl_test_objects[i].list_node, test_rht_params);
409 WARN(err, "failed to insert object %d", i);
410 if (err == 0)
411 set_bit(i, obj_in_table);
412 }
413 }
414
415 for (i = 0; i < entries; i++) {
416 cond_resched();
417 err = rhltable_remove(&rhlt, &rhl_test_objects[i].list_node, test_rht_params);
418 if (test_bit(i, obj_in_table)) {
419 if (WARN(err, "cannot remove element at slot %d", i))
420 continue;
421 } else {
422 if (WARN(err != -ENOENT, "removed non-existant element, error %d not %d",
423 err, -ENOENT))
424 continue;
425 }
426 }
427
428 rhltable_destroy(&rhlt);
429 out_free:
430 vfree(rhl_test_objects);
431 vfree(obj_in_table);
432 return ret;
> 433 }
434
---
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