Greeting, FYI, we noticed the following commit (built with gcc-7): commit: ae64ac1a83b2e4c1978f99f3c077c011a5e97350 ("[PATCH, RFC] x86/mm/pat: Restore large pages after fragmentation") url: https://github.com/0day-ci/linux/commits/Kirill-A-Shutemov/x86-mm-pat-Restore-large-pages-after-fragmentation/20200417-053430 in testcase: rcuperf with following parameters: runtime: 300s perf_type: srcu on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 8G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +--------------------------------------------------+------------+------------+ | | 9786cab674 | ae64ac1a83 | +--------------------------------------------------+------------+------------+ | boot_successes | 0 | 0 | | boot_failures | 8 | 8 | | BUG:soft_lockup-CPU##stuck_for#s![dma-fence:#:#] | 7 | | | EIP:kthread_should_stop | 1 | | | Kernel_panic-not_syncing:softlockup:hung_tasks | 7 | | | BUG:kernel_hang_in_boot_stage | 1 | | | EIP:thread_signal_callback | 6 | | | BUG:Bad_page_state_in_process | 0 | 8 | | BUG:kernel_NULL_pointer_dereference,address | 0 | 1 | | Oops:#[##] | 0 | 1 | | EIP:__rb_erase_color | 0 | 1 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 1 | +--------------------------------------------------+------------+------------+ If you fix the issue, kindly add following tag Reported-by: kernel test robot [ 44.684096] BUG: Bad page state in process swapper pfn:04f2f [ 44.684814] page:ed23c5e0 refcount:0 mapcount:0 mapping:(ptrval) index:0x0 [ 44.685602] flags: 0x1000(reserved) [ 44.686023] raw: 00001000 00000100 00000122 00000000 00000000 00000000 ffffffff 00000000 [ 44.687005] page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set [ 44.687311] bad because of flags: 0x1000(reserved) [ 44.687878] Modules linked in: [ 44.688267] CPU: 0 PID: 1 Comm: swapper Not tainted 5.7.0-rc1-00047-gae64ac1a83b2e #2 [ 44.689200] Call Trace: [ 44.689520] dump_stack+0x16/0x26 [ 44.689926] bad_page+0xa5/0x110 [ 44.690650] free_pages_check_bad+0x57/0x60 [ 44.691192] free_pcp_prepare+0x187/0x190 [ 44.691684] free_unref_page+0x13/0x40 [ 44.692161] __free_pages+0x25/0x40 [ 44.692602] change_page_attr_set_clr+0x1bd/0x3d0 [ 44.693208] set_memory_ro+0x1f/0x30 [ 44.693984] init_real_mode+0xf3/0x10a [ 44.694425] ? amd_uncore_init+0x285/0x285 [ 44.694925] do_one_initcall+0x81/0x1b0 [ 44.695390] ? _raw_write_lock_irqsave+0x10/0x40 [ 44.697316] ? proc_register+0xa3/0x120 [ 44.697821] ? proc_create_seq_private+0x39/0x40 [ 44.698407] ? init_mm_internals+0x81/0x86 [ 44.698933] kernel_init_freeable+0x58/0x180 [ 44.699475] ? rest_init+0xf0/0xf0 [ 44.699918] kernel_init+0x8/0xe0 [ 44.700646] ret_from_fork+0x19/0x24 [ 44.700944] Disabling lock debugging due to kernel taint [ 44.701351] BUG: Bad page state in process swapper pfn:04f2e [ 44.701808] page:ed23c5c0 refcount:0 mapcount:0 mapping:(ptrval) index:0x0 [ 44.702310] flags: 0x1000(reserved) [ 44.702571] raw: 00001000 00000100 00000122 00000000 00000000 00000000 ffffffff 00000000 [ 44.703165] page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set [ 44.703639] bad because of flags: 0x1000(reserved) [ 44.703972] Modules linked in: [ 44.704204] CPU: 0 PID: 1 Comm: swapper Tainted: G B 5.7.0-rc1-00047-gae64ac1a83b2e #2 [ 44.704903] Call Trace: [ 44.705111] dump_stack+0x16/0x26 [ 44.705371] bad_page+0xa5/0x110 [ 44.705621] free_pages_check_bad+0x57/0x60 [ 44.705942] free_pcp_prepare+0x187/0x190 [ 44.706284] free_unref_page+0x13/0x40 [ 44.706563] __free_pages+0x25/0x40 [ 44.706827] change_page_attr_set_clr+0x1bd/0x3d0 [ 44.707307] set_memory_ro+0x1f/0x30 [ 44.707578] init_real_mode+0xf3/0x10a [ 44.707858] ? amd_uncore_init+0x285/0x285 [ 44.708165] do_one_initcall+0x81/0x1b0 [ 44.708455] ? _raw_write_lock_irqsave+0x10/0x40 [ 44.708808] ? proc_register+0xa3/0x120 [ 44.709092] ? proc_create_seq_private+0x39/0x40 [ 44.709434] ? init_mm_internals+0x81/0x86 [ 44.709738] kernel_init_freeable+0x58/0x180 [ 44.710054] ? rest_init+0xf0/0xf0 [ 44.710324] kernel_init+0x8/0xe0 [ 44.710637] ret_from_fork+0x19/0x24 [ 44.710897] BUG: Bad page state in process swapper pfn:04f2d [ 44.711304] page:ed23c5a0 refcount:0 mapcount:0 mapping:(ptrval) index:0x0 [ 44.711789] flags: 0x1000(reserved) [ 44.712039] raw: 00001000 00000100 00000122 00000000 00000000 00000000 ffffffff 00000000 [ 44.712609] page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set [ 44.713078] bad because of flags: 0x1000(reserved) [ 44.713417] Modules linked in: [ 44.713638] CPU: 0 PID: 1 Comm: swapper Tainted: G B 5.7.0-rc1-00047-gae64ac1a83b2e #2 [ 44.713970] Call Trace: [ 44.714151] dump_stack+0x16/0x26 [ 44.714392] bad_page+0xa5/0x110 [ 44.714626] free_pages_check_bad+0x57/0x60 [ 44.714925] free_pcp_prepare+0x187/0x190 [ 44.715211] free_unref_page+0x13/0x40 [ 44.715480] __free_pages+0x25/0x40 [ 44.715732] change_page_attr_set_clr+0x1bd/0x3d0 [ 44.716067] set_memory_ro+0x1f/0x30 [ 44.717308] init_real_mode+0xf3/0x10a [ 44.717578] ? amd_uncore_init+0x285/0x285 [ 44.717871] do_one_initcall+0x81/0x1b0 [ 44.718148] ? _raw_write_lock_irqsave+0x10/0x40 [ 44.718477] ? proc_register+0xa3/0x120 [ 44.718752] ? proc_create_seq_private+0x39/0x40 [ 44.719081] ? init_mm_internals+0x81/0x86 [ 44.719375] kernel_init_freeable+0x58/0x180 [ 44.719681] ? rest_init+0xf0/0xf0 [ 44.720636] kernel_init+0x8/0xe0 [ 44.720883] ret_from_fork+0x19/0x24 [ 44.721150] BUG: Bad page state in process swapper pfn:04f2b [ 44.721556] page:ed23c560 refcount:0 mapcount:0 mapping:(ptrval) index:0x0 [ 44.722039] flags: 0x1000(reserved) [ 44.722289] raw: 00001000 00000100 00000122 00000000 00000000 00000000 ffffffff 00000000 [ 44.722856] page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set [ 44.723310] bad because of flags: 0x1000(reserved) [ 44.723649] Modules linked in: [ 44.723870] CPU: 0 PID: 1 Comm: swapper Tainted: G B 5.7.0-rc1-00047-gae64ac1a83b2e #2 [ 44.723969] Call Trace: [ 44.724159] dump_stack+0x16/0x26 [ 44.724400] bad_page+0xa5/0x110 [ 44.724643] free_pages_check_bad+0x57/0x60 [ 44.724941] free_pcp_prepare+0x187/0x190 [ 44.725228] free_unref_page+0x13/0x40 [ 44.725496] __free_pages+0x25/0x40 [ 44.725747] change_page_attr_set_clr+0x1bd/0x3d0 [ 44.726082] set_memory_ro+0x1f/0x30 [ 44.726339] init_real_mode+0xf3/0x10a [ 44.726607] ? amd_uncore_init+0x285/0x285 [ 44.727303] do_one_initcall+0x81/0x1b0 [ 44.727693] ? _raw_write_lock_irqsave+0x10/0x40 [ 44.728159] ? proc_register+0xa3/0x120 [ 44.728571] ? proc_create_seq_private+0x39/0x40 [ 44.729061] ? init_mm_internals+0x81/0x86 [ 44.729493] kernel_init_freeable+0x58/0x180 [ 44.729943] ? rest_init+0xf0/0xf0 [ 44.730303] kernel_init+0x8/0xe0 [ 44.730664] ret_from_fork+0x19/0x24 [ 44.731087] BUG: Bad page state in process swapper pfn:04f2a [ 44.731755] page:ed23c540 refcount:0 mapcount:0 mapping:(ptrval) index:0x0 [ 44.732556] flags: 0x1000(reserved) [ 44.733979] raw: 00001000 00000100 00000122 00000000 00000000 00000000 ffffffff 00000000 [ 44.734870] page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set [ 44.735663] bad because of flags: 0x1000(reserved) [ 44.736200] Modules linked in: [ 44.736565] CPU: 0 PID: 1 Comm: swapper Tainted: G B 5.7.0-rc1-00047-gae64ac1a83b2e #2 [ 44.737309] Call Trace: [ 44.737605] dump_stack+0x16/0x26 [ 44.738004] bad_page+0xa5/0x110 [ 44.738396] free_pages_check_bad+0x57/0x60 [ 44.738912] free_pcp_prepare+0x187/0x190 [ 44.739359] free_unref_page+0x13/0x40 [ 44.739782] __free_pages+0x25/0x40 [ 44.740647] change_page_attr_set_clr+0x1bd/0x3d0 [ 44.741191] set_memory_ro+0x1f/0x30 [ 44.741607] init_real_mode+0xf3/0x10a [ 44.742030] ? amd_uncore_init+0x285/0x285 [ 44.742500] do_one_initcall+0x81/0x1b0 [ 44.742955] ? _raw_write_lock_irqsave+0x10/0x40 [ 44.743480] ? proc_register+0xa3/0x120 [ 44.743979] ? proc_create_seq_private+0x39/0x40 [ 44.744516] ? init_mm_internals+0x81/0x86 [ 44.744998] kernel_init_freeable+0x58/0x180 [ 44.745488] ? rest_init+0xf0/0xf0 [ 44.745894] kernel_init+0x8/0xe0 [ 44.746328] ret_from_fork+0x19/0x24 [ 44.746762] BUG: Bad page state in process swapper pfn:04f29 [ 44.747312] page:ed23c520 refcount:0 mapcount:0 mapping:(ptrval) index:0x0 [ 44.748109] flags: 0x1000(reserved) [ 44.748502] raw: 00001000 00000100 00000122 00000000 00000000 00000000 ffffffff 00000000 [ 44.749426] page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set [ 44.750644] bad because of flags: 0x1000(reserved) [ 44.751220] Modules linked in: [ 44.751558] CPU: 0 PID: 1 Comm: swapper Tainted: G B 5.7.0-rc1-00047-gae64ac1a83b2e #2 [ 44.752572] Call Trace: [ 44.752861] dump_stack+0x16/0x26 [ 44.753242] bad_page+0xa5/0x110 [ 44.753608] free_pages_check_bad+0x57/0x60 [ 44.753980] free_pcp_prepare+0x187/0x190 [ 44.754456] free_unref_page+0x13/0x40 [ 44.754921] __free_pages+0x25/0x40 [ 44.755318] change_page_attr_set_clr+0x1bd/0x3d0 [ 44.755853] set_memory_ro+0x1f/0x30 [ 44.756270] init_real_mode+0xf3/0x10a [ 44.756731] ? amd_uncore_init+0x285/0x285 [ 44.757313] do_one_initcall+0x81/0x1b0 [ 44.757780] ? _raw_write_lock_irqsave+0x10/0x40 [ 44.758326] ? proc_register+0xa3/0x120 [ 44.758783] ? proc_create_seq_private+0x39/0x40 [ 44.759383] ? init_mm_internals+0x81/0x86 [ 44.759894] kernel_init_freeable+0x58/0x180 [ 44.760648] ? rest_init+0xf0/0xf0 [ 44.761085] kernel_init+0x8/0xe0 [ 44.761515] ret_from_fork+0x19/0x24 [ 44.761949] BUG: Bad page state in process swapper pfn:04f28 [ 44.763982] page:ed23c500 refcount:0 mapcount:0 mapping:(ptrval) index:0x0 [ 44.764473] flags: 0x1000(reserved) [ 44.764726] raw: 00001000 00000100 00000122 00000000 00000000 00000000 ffffffff 00000000 [ 44.765294] page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set [ 44.765754] bad because of flags: 0x1000(reserved) [ 44.766160] Modules linked in: [ 44.766383] CPU: 0 PID: 1 Comm: swapper Tainted: G B 5.7.0-rc1-00047-gae64ac1a83b2e #2 [ 44.767307] Call Trace: [ 44.767491] dump_stack+0x16/0x26 [ 44.767731] bad_page+0xa5/0x110 [ 44.767987] free_pages_check_bad+0x57/0x60 [ 44.768285] free_pcp_prepare+0x187/0x190 [ 44.768571] free_unref_page+0x13/0x40 [ 44.768838] __free_pages+0x25/0x40 [ 44.769089] change_page_attr_set_clr+0x1bd/0x3d0 [ 44.769423] set_memory_ro+0x1f/0x30 [ 44.769683] init_real_mode+0xf3/0x10a [ 44.769952] ? amd_uncore_init+0x285/0x285 [ 44.770248] do_one_initcall+0x81/0x1b0 [ 44.770646] ? _raw_write_lock_irqsave+0x10/0x40 [ 44.770977] ? proc_register+0xa3/0x120 [ 44.771250] ? proc_create_seq_private+0x39/0x40 [ 44.771580] ? init_mm_internals+0x81/0x86 [ 44.771889] kernel_init_freeable+0x58/0x180 [ 44.772207] ? rest_init+0xf0/0xf0 [ 44.772452] kernel_init+0x8/0xe0 [ 44.772692] ret_from_fork+0x19/0x24 [ 44.772955] BUG: Bad page state in process swapper pfn:04f27 [ 44.773503] page:ed23c4e0 refcount:0 mapcount:0 mapping:(ptrval) index:0x0 [ 44.773980] flags: 0x1000(reserved) [ 44.774392] raw: 00001000 00000100 00000122 00000000 00000000 00000000 ffffffff 00000000 [ 44.775352] page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set [ 44.775874] bad because of flags: 0x1000(reserved) [ 44.776218] Modules linked in: [ 44.776440] CPU: 0 PID: 1 Comm: swapper Tainted: G B 5.7.0-rc1-00047-gae64ac1a83b2e #2 [ 44.777308] Call Trace: [ 44.777491] dump_stack+0x16/0x26 [ 44.777730] bad_page+0xa5/0x110 [ 44.777962] free_pages_check_bad+0x57/0x60 [ 44.778258] free_pcp_prepare+0x187/0x190 [ 44.778542] free_unref_page+0x13/0x40 [ 44.778810] __free_pages+0x25/0x40 [ 44.779063] change_page_attr_set_clr+0x1bd/0x3d0 [ 44.779397] set_memory_ro+0x1f/0x30 [ 44.779752] init_real_mode+0xf3/0x10a [ 44.780160] ? amd_uncore_init+0x285/0x285 [ 44.780643] do_one_initcall+0x81/0x1b0 [ 44.780919] ? _raw_write_lock_irqsave+0x10/0x40 [ 44.781247] ? proc_register+0xa3/0x120 [ 44.781719] ? proc_create_seq_private+0x39/0x40 [ 44.782051] ? init_mm_internals+0x81/0x86 [ 44.782345] kernel_init_freeable+0x58/0x180 [ 44.782651] ? rest_init+0xf0/0xf0 [ 44.782895] kernel_init+0x8/0xe0 [ 44.783133] ret_from_fork+0x19/0x24 [ 44.783391] BUG: Bad page state in process swapper pfn:04f26 [ 44.783977] page:ed23c4c0 refcount:0 mapcount:0 mapping:(ptrval) index:0x0 [ 44.784481] flags: 0x1000(reserved) [ 44.784731] raw: 00001000 00000100 00000122 00000000 00000000 00000000 ffffffff 00000000 [ 44.785293] page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set [ 44.785744] bad because of flags: 0x1000(reserved) [ 44.786082] Modules linked in: [ 44.786304] CPU: 0 PID: 1 Comm: swapper Tainted: G B 5.7.0-rc1-00047-gae64ac1a83b2e #2 [ 44.786953] Call Trace: [ 44.787312] dump_stack+0x16/0x26 [ 44.787553] bad_page+0xa5/0x110 [ 44.787785] free_pages_check_bad+0x57/0x60 [ 44.788096] free_pcp_prepare+0x187/0x190 [ 44.788382] free_unref_page+0x13/0x40 [ 44.788648] __free_pages+0x25/0x40 [ 44.788898] change_page_attr_set_clr+0x1bd/0x3d0 [ 44.789230] set_memory_ro+0x1f/0x30 [ 44.789486] init_real_mode+0xf3/0x10a [ 44.789752] ? amd_uncore_init+0x285/0x285 [ 44.790041] do_one_initcall+0x81/0x1b0 [ 44.790315] ? _raw_write_lock_irqsave+0x10/0x40 [ 44.790640] ? proc_register+0xa3/0x120 [ 44.790913] ? proc_create_seq_private+0x39/0x40 [ 44.791240] ? init_mm_internals+0x81/0x86 [ 44.791539] kernel_init_freeable+0x58/0x180 [ 44.791846] ? rest_init+0xf0/0xf0 [ 44.792101] kernel_init+0x8/0xe0 [ 44.792337] ret_from_fork+0x19/0x24 [ 44.792604] BUG: Bad page state in process swapper pfn:04f25 [ 44.793019] page:ed23c4a0 refcount:0 mapcount:0 mapping:(ptrval) index:0x0 [ 44.793498] flags: 0x1000(reserved) [ 44.793748] raw: 00001000 00000100 00000122 00000000 00000000 00000000 ffffffff 00000000 [ 44.793971] page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set [ 44.794425] bad because of flags: 0x1000(reserved) [ 44.794761] Modules linked in: [ 44.794981] CPU: 0 PID: 1 Comm: swapper Tainted: G B 5.7.0-rc1-00047-gae64ac1a83b2e #2 [ 44.795629] Call Trace: [ 44.795815] dump_stack+0x16/0x26 [ 44.796061] bad_page+0xa5/0x110 [ 44.796291] free_pages_check_bad+0x57/0x60 [ 44.796587] free_pcp_prepare+0x187/0x190 [ 44.797304] free_unref_page+0x13/0x40 [ 44.797571] __free_pages+0x25/0x40 [ 44.797821] change_page_attr_set_clr+0x1bd/0x3d0 [ 44.798152] set_memory_ro+0x1f/0x30 [ 44.798406] init_real_mode+0xf3/0x10a [ 44.798673] ? amd_uncore_init+0x285/0x285 [ 44.798968] do_one_initcall+0x81/0x1b0 [ 44.799240] ? _raw_write_lock_irqsave+0x10/0x40 [ 44.799566] ? proc_register+0xa3/0x120 [ 44.799838] ? proc_create_seq_private+0x39/0x40 [ 44.800641] ? init_mm_internals+0x81/0x86 [ 44.800932] kernel_init_freeable+0x58/0x180 [ 44.801232] ? rest_init+0xf0/0xf0 [ 44.801473] kernel_init+0x8/0xe0 [ 44.801708] ret_from_fork+0x19/0x24 [ 44.801963] BUG: Bad page state in process swapper pfn:04f24 [ 44.802365] page:ed23c480 refcount:0 mapcount:0 mapping:(ptrval) index:0x0 [ 44.802842] flags: 0x1000(reserved) [ 44.803971] raw: 00001000 00000100 00000122 00000000 00000000 00000000 ffffffff 00000000 [ 44.804552] page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set [ 44.804999] bad because of flags: 0x1000(reserved) [ 44.805334] Modules linked in: [ 44.805553] CPU: 0 PID: 1 Comm: swapper Tainted: G B 5.7.0-rc1-00047-gae64ac1a83b2e #2 [ 44.806194] Call Trace: [ 44.806374] dump_stack+0x16/0x26 [ 44.806610] bad_page+0xa5/0x110 [ 44.806841] free_pages_check_bad+0x57/0x60 [ 44.807304] free_pcp_prepare+0x187/0x190 [ 44.807588] free_unref_page+0x13/0x40 [ 44.807854] __free_pages+0x25/0x40 [ 44.808117] change_page_attr_set_clr+0x1bd/0x3d0 [ 44.808461] set_memory_ro+0x1f/0x30 [ 44.808722] init_real_mode+0xf3/0x10a [ 44.808988] ? amd_uncore_init+0x285/0x285 [ 44.809278] do_one_initcall+0x81/0x1b0 [ 44.809551] ? _raw_write_lock_irqsave+0x10/0x40 [ 44.809878] ? proc_register+0xa3/0x120 [ 44.810150] ? proc_create_seq_private+0x39/0x40 [ 44.810493] ? init_mm_internals+0x81/0x86 [ 44.810637] kernel_init_freeable+0x58/0x180 [ 44.811077] ? rest_init+0xf0/0xf0 [ 44.811445] kernel_init+0x8/0xe0 [ 44.811808] ret_from_fork+0x19/0x24 [ 44.812584] NMI watchdog: Perf NMI watchdog permanently disabled [ 44.814149] devtmpfs: initialized [ 44.817084] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 6370867519511994 ns [ 44.817336] futex hash table entries: 16 (order: -3, 768 bytes, linear) [ 44.820746] regulator-dummy: no parameters [ 44.821294] thermal_sys: Registered thermal governor 'step_wise' [ 44.821421] NET: Registered protocol family 16 [ 44.824061] audit: initializing netlink subsys (disabled) [ 44.824998] EISA bus registered [ 44.825378] cpuidle: using governor menu [ 44.827062] ACPI: bus type PCI registered [ 44.827627] PCI: PCI BIOS area is rw and x. Use pci=nobios if you want it NX. [ 44.828476] PCI: PCI BIOS revision 2.10 entry at 0xfd1bc, last bus=0 [ 44.847580] audit: type=2000 audit(1587758258.345:1): state=initialized audit_enabled=0 res=1 [ 44.848798] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages [ 44.850363] workqueue: round-robin CPU selection forced, expect performance impact [ 44.856267] gpio-f7188x: Not a Fintek device at 0x0000002e [ 44.856933] gpio-f7188x: Not a Fintek device at 0x0000004e [ 44.857444] ACPI: Added _OSI(Module Device) [ 44.857936] ACPI: Added _OSI(Processor Device) [ 44.858438] ACPI: Added _OSI(3.0 _SCP Extensions) [ 44.859006] ACPI: Added _OSI(Processor Aggregator Device) [ 44.859528] ACPI: Added _OSI(Linux-Dell-Video) [ 44.859954] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio) [ 44.860646] ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics) [ 44.862719] ACPI: 1 ACPI AML tables successfully acquired and loaded [ 44.866154] ACPI: Interpreter enabled [ 44.866606] ACPI: (supports S0 S5) [ 44.867003] ACPI: Using PIC for interrupt routing [ 44.867338] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug [ 44.868124] ACPI: Enabled 2 GPEs in block 00 to 0F [ 44.871856] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff]) [ 44.872315] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments HPX-Type3] [ 44.872889] PCI host bridge to bus 0000:00 [ 44.873329] pci_bus 0000:00: root bus resource [io 0x0000-0x0cf7 window] [ 44.873979] pci_bus 0000:00: root bus resource [io 0x0d00-0xffff window] [ 44.874763] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window] [ 44.875638] pci_bus 0000:00: root bus resource [mem 0xc0000000-0xfebfffff window] [ 44.876498] pci_bus 0000:00: root bus resource [mem 0x240000000-0x2bfffffff window] [ 44.877313] pci_bus 0000:00: root bus resource [bus 00-ff] [ 44.878007] pci 0000:00:00.0: [8086:1237] type 00 class 0x060000 [ 44.879161] pci 0000:00:01.0: [8086:7000] type 00 class 0x060100 [ 44.880662] pci 0000:00:01.1: [8086:7010] type 00 class 0x010180 [ 44.889122] pci 0000:00:01.1: reg 0x20: [io 0xc200-0xc20f] [ 44.892474] pci 0000:00:01.1: legacy IDE quirk: reg 0x10: [io 0x01f0-0x01f7] [ 44.893295] pci 0000:00:01.1: legacy IDE quirk: reg 0x14: [io 0x03f6] [ 44.893973] pci 0000:00:01.1: legacy IDE quirk: reg 0x18: [io 0x0170-0x0177] [ 44.894774] pci 0000:00:01.1: legacy IDE quirk: reg 0x1c: [io 0x0376] [ 44.895852] pci 0000:00:01.3: [8086:7113] type 00 class 0x068000 [ 44.896877] pci 0000:00:01.3: quirk: [io 0x0600-0x063f] claimed by PIIX4 ACPI [ 44.897345] pci 0000:00:01.3: quirk: [io 0x0700-0x070f] claimed by PIIX4 SMB [ 44.900994] pci 0000:00:02.0: [1234:1111] type 00 class 0x030000 [ 44.907328] pci 0000:00:02.0: reg 0x10: [mem 0xfd000000-0xfdffffff pref] [ 44.914000] pci 0000:00:02.0: reg 0x18: [mem 0xfebf0000-0xfebf0fff] [ 44.924648] pci 0000:00:02.0: reg 0x30: [mem 0xfebe0000-0xfebeffff pref] [ 44.925417] pci 0000:00:03.0: [8086:100e] type 00 class 0x020000 [ 44.927035] pci 0000:00:03.0: reg 0x10: [mem 0xfebc0000-0xfebdffff] [ 44.928866] pci 0000:00:03.0: reg 0x14: [io 0xc000-0xc03f] [ 44.936749] pci 0000:00:03.0: reg 0x30: [mem 0xfeb80000-0xfebbffff pref] [ 44.937531] pci 0000:00:04.0: [1af4:1001] type 00 class 0x010000 [ 44.939650] pci 0000:00:04.0: reg 0x10: [io 0xc040-0xc07f] [ 44.942024] pci 0000:00:04.0: reg 0x14: [mem 0xfebf1000-0xfebf1fff] [ 44.953966] pci 0000:00:04.0: reg 0x20: [mem 0xfe000000-0xfe003fff 64bit pref] [ 44.959277] pci 0000:00:05.0: [1af4:1001] type 00 class 0x010000 [ 44.963446] pci 0000:00:05.0: reg 0x10: [io 0xc080-0xc0bf] [ 44.966776] pci 0000:00:05.0: reg 0x14: [mem 0xfebf2000-0xfebf2fff] [ 44.976770] pci 0000:00:05.0: reg 0x20: [mem 0xfe004000-0xfe007fff 64bit pref] [ 44.981292] pci 0000:00:06.0: [1af4:1001] type 00 class 0x010000 [ 44.986773] pci 0000:00:06.0: reg 0x10: [io 0xc0c0-0xc0ff] [ 44.989996] pci 0000:00:06.0: reg 0x14: [mem 0xfebf3000-0xfebf3fff] [ 44.998150] pci 0000:00:06.0: reg 0x20: [mem 0xfe008000-0xfe00bfff 64bit pref] [ 45.001040] pci 0000:00:07.0: [1af4:1001] type 00 class 0x010000 [ 45.003204] pci 0000:00:07.0: reg 0x10: [io 0xc100-0xc13f] To reproduce: # build kernel cd linux cp config-5.7.0-rc1-00047-gae64ac1a83b2e .config make HOSTCC=gcc-7 CC=gcc-7 ARCH=i386 olddefconfig prepare modules_prepare bzImage git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k job-script # job-script is attached in this email Thanks, Rong Chen