tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 62f92d634458a1e308bb699986b9147a6d670457 commit: 5a90b60db5e6765367d9bb2c03f66b14d72946d2 [10737/12481] drm/xe: Add a xe_bo subtest for shrinking / swapping config: i386-randconfig-061-20240920 (https://download.01.org/0day-ci/archive/20240920/202409202208.UBP1iDim-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-12) 11.3.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240920/202409202208.UBP1iDim-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202409202208.UBP1iDim-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) drivers/gpu/drm/xe/xe_bo.c: note: in included file: drivers/gpu/drm/xe/xe_bo.c: note: in included file (through include/linux/smp.h, include/linux/lockdep.h, include/linux/spinlock.h, ...): include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true drivers/gpu/drm/xe/xe_bo.c: note: in included file: >> drivers/gpu/drm/xe/tests/xe_bo.c:456:17: sparse: sparse: cast truncates bits from constant value (800000000 becomes 0) drivers/gpu/drm/xe/tests/xe_bo.c:459:25: sparse: sparse: cast truncates bits from constant value (400000000 becomes 0) drivers/gpu/drm/xe/xe_bo.c: note: in included file (through include/linux/smp.h, include/linux/lockdep.h, include/linux/spinlock.h, ...): include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true vim +456 drivers/gpu/drm/xe/tests/xe_bo.c 430 431 /* 432 * Try to create system bos corresponding to twice the amount 433 * of available system memory to test shrinker functionality. 434 * If no swap space is available to accommodate the 435 * memory overcommit, mark bos purgeable. 436 */ 437 static int shrink_test_run_device(struct xe_device *xe) 438 { 439 struct kunit *test = kunit_get_current_test(); 440 LIST_HEAD(bos); 441 struct xe_bo_link *link, *next; 442 struct sysinfo si; 443 size_t ram, ram_and_swap, purgeable, alloced, to_alloc, limit; 444 unsigned int interrupted = 0, successful = 0, count = 0; 445 struct rnd_state prng; 446 u64 rand_seed; 447 bool failed = false; 448 449 rand_seed = get_random_u64(); 450 prandom_seed_state(&prng, rand_seed); 451 kunit_info(test, "Random seed is 0x%016llx.\n", 452 (unsigned long long)rand_seed); 453 454 /* Skip if execution time is expected to be too long. */ 455 > 456 limit = SZ_32G; 457 /* IGFX with flat CCS needs to copy when swapping / shrinking */ 458 if (!IS_DGFX(xe) && xe_device_has_flat_ccs(xe)) 459 limit = SZ_16G; 460 461 si_meminfo(&si); 462 ram = (size_t)si.freeram * si.mem_unit; 463 if (ram > limit) { 464 kunit_skip(test, "Too long expected execution time.\n"); 465 return 0; 466 } 467 to_alloc = ram * 2; 468 469 ram_and_swap = ram + get_nr_swap_pages() * PAGE_SIZE; 470 if (to_alloc > ram_and_swap) 471 purgeable = to_alloc - ram_and_swap; 472 purgeable += purgeable / 5; 473 474 kunit_info(test, "Free ram is %lu bytes. Will allocate twice of that.\n", 475 (unsigned long)ram); 476 for (alloced = 0; alloced < to_alloc; alloced += XE_BO_SHRINK_SIZE) { 477 struct xe_bo *bo; 478 unsigned int mem_type; 479 struct xe_ttm_tt *xe_tt; 480 481 link = kzalloc(sizeof(*link), GFP_KERNEL); 482 if (!link) { 483 KUNIT_FAIL(test, "Unexpected link allocation failure\n"); 484 failed = true; 485 break; 486 } 487 488 INIT_LIST_HEAD(&link->link); 489 490 /* We can create bos using WC caching here. But it is slower. */ 491 bo = xe_bo_create_user(xe, NULL, NULL, XE_BO_SHRINK_SIZE, 492 DRM_XE_GEM_CPU_CACHING_WB, 493 XE_BO_FLAG_SYSTEM); 494 if (IS_ERR(bo)) { 495 if (bo != ERR_PTR(-ENOMEM) && bo != ERR_PTR(-ENOSPC) && 496 bo != ERR_PTR(-EINTR) && bo != ERR_PTR(-ERESTARTSYS)) 497 KUNIT_FAIL(test, "Error creating bo: %pe\n", bo); 498 kfree(link); 499 failed = true; 500 break; 501 } 502 xe_bo_lock(bo, false); 503 xe_tt = container_of(bo->ttm.ttm, typeof(*xe_tt), ttm); 504 505 /* 506 * Allocate purgeable bos first, because if we do it the 507 * other way around, they may not be subject to swapping... 508 */ 509 if (alloced < purgeable) { 510 xe_tt->purgeable = true; 511 bo->ttm.priority = 0; 512 } else { 513 int ret = shrink_test_fill_random(bo, &prng, link); 514 515 if (ret) { 516 xe_bo_unlock(bo); 517 xe_bo_put(bo); 518 KUNIT_FAIL(test, "Error filling bo with random data: %pe\n", 519 ERR_PTR(ret)); 520 kfree(link); 521 failed = true; 522 break; 523 } 524 } 525 526 mem_type = bo->ttm.resource->mem_type; 527 xe_bo_unlock(bo); 528 link->bo = bo; 529 list_add_tail(&link->link, &bos); 530 531 if (mem_type != XE_PL_TT) { 532 KUNIT_FAIL(test, "Bo in incorrect memory type: %u\n", 533 bo->ttm.resource->mem_type); 534 failed = true; 535 } 536 cond_resched(); 537 if (signal_pending(current)) 538 break; 539 } 540 541 /* 542 * Read back and destroy bos. Reset the pseudo-random seed to get an 543 * identical pseudo-random number sequence for readback. 544 */ 545 prandom_seed_state(&prng, rand_seed); 546 list_for_each_entry_safe(link, next, &bos, link) { 547 static struct ttm_operation_ctx ctx = {.interruptible = true}; 548 struct xe_bo *bo = link->bo; 549 struct xe_ttm_tt *xe_tt; 550 int ret; 551 552 count++; 553 if (!signal_pending(current) && !failed) { 554 bool purgeable, intr = false; 555 556 xe_bo_lock(bo, NULL); 557 558 /* xe_tt->purgeable is cleared on validate. */ 559 xe_tt = container_of(bo->ttm.ttm, typeof(*xe_tt), ttm); 560 purgeable = xe_tt->purgeable; 561 do { 562 ret = ttm_bo_validate(&bo->ttm, &tt_placement, &ctx); 563 if (ret == -EINTR) 564 intr = true; 565 } while (ret == -EINTR && !signal_pending(current)); 566 567 if (!ret && !purgeable) 568 failed = shrink_test_verify(test, bo, count, &prng, link); 569 570 xe_bo_unlock(bo); 571 if (ret) { 572 KUNIT_FAIL(test, "Validation failed: %pe\n", 573 ERR_PTR(ret)); 574 failed = true; 575 } else if (intr) { 576 interrupted++; 577 } else { 578 successful++; 579 } 580 } 581 xe_bo_put(link->bo); 582 list_del(&link->link); 583 kfree(link); 584 } 585 kunit_info(test, "Readbacks interrupted: %u successful: %u\n", 586 interrupted, successful); 587 588 return 0; 589 } 590 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
