Hi Fengguang, On Mon, Aug 1, 2016 at 3:43 AM, Fengguang Wu wrote: > Hi Alexander, > > FYI, your patch seems to disclose a bug. > > https://github.com/0day-ci/linux Alexander-Potapenko/mm-kasan-stackdepot-and-quarantine-for-SLUB/20160713-021523 > > commit 85d9adbf58cdb6eb9101f64e99e10aed5271bbef > Author: Alexander Potapenko > AuthorDate: Tue Jul 12 20:12:45 2016 +0200 > Commit: 0day robot > CommitDate: Wed Jul 13 02:15:27 2016 +0800 > > mm, kasan: switch SLUB to stackdepot, enable memory quarantine for SLUB > > For KASAN builds: > - switch SLUB allocator to using stackdepot instead of storing the > allocation/deallocation stacks in the objects; > - change the freelist hook so that parts of the freelist can be put > into the quarantine. > > Signed-off-by: Alexander Potapenko > > +-----------------------------------------------------------+--------------------+-------------------+--------------------+ > | | c840cd907d | 85d9adbf58 | v4.7-rc7_072217 | > +-----------------------------------------------------------+--------------------+-------------------+--------------------+ > | boot_successes | 172 | 12 | 1 | > | boot_failures | 149 | 74 | 31 | > | Kernel_panic-not_syncing:Attempted_to_kill_init!exitcode= | 147 | 45 | 4 | > | timestamp.last | 6784.8475610000005 | 6338.260496000002 | 1703.2160550000003 | > | RIP:_raw_spin_unlock_irqrestore | 1 | | | > | Kernel_panic-not_syncing:softlockup:hung_tasks | 2 | 27 | 25 | > | backtrace:__pci_register_driver | 2 | 27 | 25 | > | backtrace:virtio_pci_driver_init | 2 | 27 | 25 | > | backtrace:do_basic_setup | 2 | 27 | 25 | > | backtrace:kernel_init_freeable | 2 | 27 | 25 | > | RIP:T | 1 | 7 | 8 | > | IP-Config:Auto-configuration_of_network_failed | 0 | 2 | 2 | > | RIP:qlink_free | 0 | 6 | 6 | > | RIP:fgraph_trace | 0 | 4 | 2 | > | RIP:print_context_stack | 0 | 3 | | > | RIP:save_stack_address | 0 | 1 | | > | RIP:is_module_text_address | 0 | 2 | 2 | > | RIP:__kernel_text_address | 0 | 4 | 3 | > | RIP:ftrace_stub | 0 | 0 | 1 | > | RIP:__module_text_address | 0 | 0 | 1 | > | RIP:__module_address | 0 | 0 | 2 | > +-----------------------------------------------------------+--------------------+-------------------+--------------------+ > > [ 25.468156] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x2a2e6a714ac, max_idle_ns: 440795306413 ns > [ 25.472330] virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver > [ 53.184191] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [swapper:1] > [ 53.186917] Modules linked in: > [ 53.188237] irq event stamp: 4826090 > [ 53.189543] hardirqs last enabled at (4826089): [] qlink_free+0xb4/0xf0 > [ 53.192339] hardirqs last disabled at (4826090): [] apic_timer_interrupt+0x85/0x90 > [ 53.206320] softirqs last enabled at (4825910): [] __do_softirq+0x3ee/0x44c > [ 53.209186] softirqs last disabled at (4825903): [] irq_exit+0x52/0xa0 > [ 53.211949] CPU: 0 PID: 1 Comm: swapper Not tainted 4.7.0-rc7-00002-g85d9adb #1 > [ 53.214479] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 > [ 53.228319] task: ffff88000c9d0040 ti: ffff88000c9d8000 task.ti: ffff88000c9d8000 > [ 53.230885] RIP: 0010:[] [] qlink_free+0xc7/0xf0 > [ 53.233602] RSP: 0000:ffff88000c9df2a8 EFLAGS: 00000282 > [ 53.235189] RAX: ffff88000c9d0040 RBX: ffff880009e281a0 RCX: 0000000000000028 > [ 53.237071] RDX: 0000000000000006 RSI: 0000000000000001 RDI: 0000000000000282 > [ 53.238962] RBP: ffff88000c9df2c8 R08: 0000000000000001 R09: 0000000000000000 > [ 53.251888] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88000c95fbc0 > [ 53.253785] R13: 0000000000000282 R14: ffff880009e28318 R15: ffff88000c9df2d8 > [ 53.255672] FS: 0000000000000000(0000) GS:ffffffff81e2e000(0000) knlGS:0000000000000000 > [ 53.258328] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 53.259977] CR2: 0000000000000000 CR3: 0000000001e15000 CR4: 00000000000006f0 > [ 53.272898] Stack: > [ 53.273946] 0000000000000000 ffff880009e28998 ffff88000c9df328 0000000080000000 > [ 53.276900] ffff88000c9df318 ffffffff811b3603 ffffea00002873e0 ffffffff81e72f60 > [ 53.279869] ffff88000c9df2f8 ffff88000c9df328 0000000000000000 ffff88000c9df348 > [ 53.282801] Call Trace: > [ 53.294954] [] qlist_free_all+0x83/0xc0 > [ 53.296564] [] quarantine_reduce+0x248/0x260 > [ 53.298247] [] ? do_raw_spin_unlock+0xe/0x90 > [ 53.299927] [] ? _raw_spin_unlock+0x2b/0x40 > [ 53.301597] [] ? deactivate_slab+0x7d3/0x800 > [ 53.303284] [] kasan_kmalloc+0x38/0x170 > [ 53.304898] [] ? dump_trace+0x20b/0x270 > [ 53.317543] [] ? acpi_ut_create_generic_state+0x47/0x52 > [ 53.319377] [] ? save_stack_trace+0x2e/0x50 > [ 53.321045] [] ? set_track+0x77/0x110 > [ 53.322637] [] ? acpi_ut_create_generic_state+0x47/0x52 > [ 53.324466] [] ? init_object+0x87/0xa0 > [ 53.326058] [] ? alloc_debug_processing+0x12b/0x1a0 > [ 53.327842] [] ? T.1964+0x33f/0x370 > [ 53.329390] [] ? acpi_ut_create_generic_state+0x47/0x52 > [ 53.331229] [] ? bus_add_driver+0xfc/0x200 > [ 53.332881] [] ? driver_register+0x95/0xd0 > [ 53.334544] [] ? __pci_register_driver+0x68/0x70 > [ 53.336280] [] ? T.1965+0x91/0xc0 > [ 53.337799] [] ? acpi_ut_create_generic_state+0x47/0x52 > [ 53.339643] [] ? trace_hardirqs_on_caller+0x193/0x1f0 > [ 53.341456] [] ? trace_hardirqs_on+0xd/0x10 > [ 53.343118] [] kasan_slab_alloc+0xf/0x20 > [ 53.344737] [] kmem_cache_alloc+0xe4/0x200 > [ 53.346385] [] ? _raw_spin_unlock_irqrestore+0x55/0x80 > [ 53.348198] [] ? trace_hardirqs_on_caller+0x193/0x1f0 > [ 53.350004] [] acpi_ut_create_generic_state+0x47/0x52 > [ 53.351806] [] acpi_ut_create_update_state+0x17/0x2e > [ 53.353607] [] acpi_ut_create_update_state_and_push+0x20/0x3b > [ 53.356132] [] acpi_ut_update_object_reference+0xd3/0x1b7 > [ 53.358011] [] acpi_ut_remove_reference+0x32/0x36 > [ 53.359764] [] acpi_ds_clear_implicit_return+0x2b/0x3a > [ 53.361602] [] acpi_ds_do_implicit_return+0x46/0x65 > [ 53.363385] [] acpi_ds_is_result_used+0x47/0x105 > [ 53.365118] [] acpi_ds_delete_result_if_not_used+0x44/0x67 > [ 53.367005] [] ? acpi_ds_result_push+0x7e/0x138 > [ 53.368724] [] acpi_ds_exec_end_op+0x3b7/0x3dc > [ 53.370432] [] acpi_ps_parse_loop+0x2b2/0x325 > [ 53.372136] [] acpi_ps_parse_aml+0x9d/0x279 > [ 53.373806] [] acpi_ps_execute_method+0x163/0x1c8 > [ 53.375566] [] acpi_ns_evaluate+0x1d8/0x263 > [ 53.377238] [] acpi_ut_evaluate_object+0x87/0x1b0 > [ 53.378987] [] acpi_rs_get_prt_method_data+0x26/0x4c > [ 53.380791] [] ? acpi_rs_validate_parameters+0x3f/0x56 > [ 53.382621] [] acpi_get_irq_routing_table+0x2a/0x31 > [ 53.384407] [] acpi_pci_irq_find_prt_entry+0x99/0x1b5 > [ 53.386229] [] acpi_pci_irq_lookup+0x2d/0x164 > [ 53.387914] [] acpi_pci_irq_enable+0x6d/0x1a4 > [ 53.389611] [] pcibios_enable_device+0x23/0x30 > [ 53.391319] [] do_pci_enable_device+0x4e/0xd0 > [ 53.393008] [] pci_enable_device_flags+0xc5/0xe0 > [ 53.394766] [] ? __raw_spin_lock_init+0x3b/0x60 > [ 53.396497] [] pci_enable_device+0x13/0x20 > [ 53.398159] [] virtio_pci_probe+0x9b/0x110 > [ 53.399806] [] ? pci_match_id+0x9/0x80 > [ 53.401404] [] ? pci_match_device+0x107/0x110 > [ 53.403090] [] local_pci_probe+0x23/0x60 > [ 53.404717] [] pci_device_probe+0x76/0xb0 > [ 53.406357] [] ? driver_sysfs_add+0x73/0xa0 > [ 53.408007] [] really_probe+0xf7/0x230 > [ 53.409616] [] ? pci_match_id+0x9/0x80 > [ 53.411219] [] ? pci_match_device+0x107/0x110 > [ 53.412926] [] driver_probe_device+0x22/0x30 > [ 53.414619] [] __driver_attach+0x81/0xb0 > [ 53.416267] [] ? driver_probe_device+0x30/0x30 > [ 53.417983] [] ? driver_probe_device+0x30/0x30 > [ 53.419702] [] bus_for_each_dev+0x64/0xb0 > [ 53.421345] [] driver_attach+0x1e/0x20 > [ 53.422940] [] bus_add_driver+0xfc/0x200 > [ 53.424568] [] driver_register+0x95/0xd0 > [ 53.426206] [] __pci_register_driver+0x68/0x70 > [ 53.427913] [] ? hidma_driver_init+0x14/0x14 > [ 53.429599] [] virtio_pci_driver_init+0x19/0x1b > [ 53.431338] [] do_one_initcall+0xa5/0x190 > [ 53.432980] [] ? kernel_init_freeable+0xa2/0xf0 > [ 53.434711] [] do_basic_setup+0xba/0xdd > [ 53.436329] [] ? kernel_init_freeable+0xf0/0xf0 > [ 53.438075] [] kernel_init_freeable+0x76/0xf0 > [ 53.439786] [] kernel_init+0xe/0x100 > [ 53.441373] [] ret_from_fork+0x1f/0x40 > [ 53.442971] [] ? rest_init+0x140/0x140 > [ 53.444565] Code: eb fe 4c 89 ef 57 9d 0f 1f 44 00 00 e8 a3 18 f0 ff eb 1d e8 8c 33 f0 ff 48 83 3d 9c 54 c8 00 00 75 04 0f 0b eb fe 4c 89 ef 57 9d <0f> 1f 44 00 00 48 8b 1c 24 4c 8b 64 24 08 4c 8b 6c 24 10 4c 8b > [ 53.456407] Kernel panic - not syncing: softlockup: hung tasks > [ 53.458116] CPU: 0 PID: 1 Comm: swapper Tainted: G L 4.7.0-rc7-00002-g85d9adb #1 > [ 53.460839] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 > [ 53.463680] ffff88000c9d0040 ffffffff81e35d48 ffffffff814710db ffffffff81e35dc8 > [ 53.482354] ffffffff8115bdf6 ffff880000000008 ffffffff81e35dd8 ffffffff81e35d78 > [ 53.485366] 0000000000000000 ffffffff81e35dc8 00000000ffffffff ffff88000c9d0040 > [ 53.488365] Call Trace: > [ 53.489479] [] dump_stack+0x19/0x1e > [ 53.491259] [] panic+0xd8/0x243 > [ 53.492765] [] watchdog_timer_fn+0x1a8/0x1e0 > [ 53.494461] [] T.866+0x272/0x3c0 > [ 53.495976] [] ? hrtimer_run_queues+0x32/0xe0 > [ 53.497683] [] ? ktime_get_update_offsets_now+0xbc/0x1b0 > [ 53.499538] [] ? kvm_clock_read+0x16/0x20 > [ 53.501194] [] ? kvm_clock_get_cycles+0x9/0x10 > [ 53.513930] [] ? ktime_get_update_offsets_now+0x10a/0x1b0 > [ 53.515813] [] ? do_raw_spin_lock+0x19/0xf0 > [ 53.517497] [] hrtimer_run_queues+0xa4/0xe0 > [ 53.519176] [] run_local_timers+0xe/0x20 > [ 53.520805] [] update_process_times+0x30/0x70 > [ 53.522514] [] tick_nohz_handler+0x98/0xe0 > [ 53.535190] [] ? trace_hardirqs_off_thunk+0x1a/0x1c > [ 53.536980] [] local_apic_timer_interrupt+0x40/0x50 > [ 53.538773] [] smp_apic_timer_interrupt+0x3f/0x52 > [ 53.540533] [] apic_timer_interrupt+0x8a/0x90 > [ 53.542238] [] ? qlink_free+0xc7/0xf0 > [ 53.544038] [] qlist_free_all+0x83/0xc0 > [ 53.545664] [] quarantine_reduce+0x248/0x260 > [ 53.558392] [] ? do_raw_spin_unlock+0xe/0x90 > [ 53.560080] [] ? _raw_spin_unlock+0x2b/0x40 > [ 53.561758] [] ? deactivate_slab+0x7d3/0x800 > [ 53.563450] [] kasan_kmalloc+0x38/0x170 > [ 53.565068] [] ? dump_trace+0x20b/0x270 > [ 53.566686] [] ? acpi_ut_create_generic_state+0x47/0x52 > [ 53.579573] [] ? save_stack_trace+0x2e/0x50 > [ 53.581263] [] ? set_track+0x77/0x110 > [ 53.582843] [] ? acpi_ut_create_generic_state+0x47/0x52 > [ 53.584745] [] ? init_object+0x87/0xa0 > [ 53.586351] [] ? alloc_debug_processing+0x12b/0x1a0 > [ 53.588160] [] ? T.1964+0x33f/0x370 > [ 53.589730] [] ? acpi_ut_create_generic_state+0x47/0x52 > [ 53.602613] [] ? bus_add_driver+0xfc/0x200 > [ 53.604286] [] ? driver_register+0x95/0xd0 > [ 53.605949] [] ? __pci_register_driver+0x68/0x70 > [ 53.607694] [] ? T.1965+0x91/0xc0 > [ 53.609267] [] ? acpi_ut_create_generic_state+0x47/0x52 > [ 53.611115] [] ? trace_hardirqs_on_caller+0x193/0x1f0 > [ 53.623966] [] ? trace_hardirqs_on+0xd/0x10 > [ 53.625650] [] kasan_slab_alloc+0xf/0x20 > [ 53.627273] [] kmem_cache_alloc+0xe4/0x200 > [ 53.628926] [] ? _raw_spin_unlock_irqrestore+0x55/0x80 > [ 53.630752] [] ? trace_hardirqs_on_caller+0x193/0x1f0 > [ 53.632566] [] acpi_ut_create_generic_state+0x47/0x52 > [ 53.645413] [] acpi_ut_create_update_state+0x17/0x2e > [ 53.647237] [] acpi_ut_create_update_state_and_push+0x20/0x3b > [ 53.649783] [] acpi_ut_update_object_reference+0xd3/0x1b7 > [ 53.651660] [] acpi_ut_remove_reference+0x32/0x36 > [ 53.653425] [] acpi_ds_clear_implicit_return+0x2b/0x3a > [ 53.655252] [] acpi_ds_do_implicit_return+0x46/0x65 > [ 53.668059] [] acpi_ds_is_result_used+0x47/0x105 > [ 53.669811] [] acpi_ds_delete_result_if_not_used+0x44/0x67 > [ 53.671698] [] ? acpi_ds_result_push+0x7e/0x138 > [ 53.673435] [] acpi_ds_exec_end_op+0x3b7/0x3dc > [ 53.675156] [] acpi_ps_parse_loop+0x2b2/0x325 > [ 53.676858] [] acpi_ps_parse_aml+0x9d/0x279 > [ 53.689564] [] acpi_ps_execute_method+0x163/0x1c8 > [ 53.691332] [] acpi_ns_evaluate+0x1d8/0x263 > [ 53.693005] [] acpi_ut_evaluate_object+0x87/0x1b0 > [ 53.694773] [] acpi_rs_get_prt_method_data+0x26/0x4c > [ 53.696571] [] ? acpi_rs_validate_parameters+0x3f/0x56 > [ 53.698403] [] acpi_get_irq_routing_table+0x2a/0x31 > [ 53.715224] [] acpi_pci_irq_find_prt_entry+0x99/0x1b5 > [ 53.717046] [] acpi_pci_irq_lookup+0x2d/0x164 > [ 53.718757] [] acpi_pci_irq_enable+0x6d/0x1a4 > [ 53.720466] [] pcibios_enable_device+0x23/0x30 > [ 53.722195] [] do_pci_enable_device+0x4e/0xd0 > [ 53.723924] [] pci_enable_device_flags+0xc5/0xe0 > [ 53.735898] [] ? __raw_spin_lock_init+0x3b/0x60 > [ 53.737642] [] pci_enable_device+0x13/0x20 > [ 53.739312] [] virtio_pci_probe+0x9b/0x110 > [ 53.740983] [] ? pci_match_id+0x9/0x80 > [ 53.742590] [] ? pci_match_device+0x107/0x110 > [ 53.744292] [] local_pci_probe+0x23/0x60 > [ 53.745917] [] pci_device_probe+0x76/0xb0 > [ 53.758611] [] ? driver_sysfs_add+0x73/0xa0 > [ 53.760286] [] really_probe+0xf7/0x230 > [ 53.761890] [] ? pci_match_id+0x9/0x80 > [ 53.763498] [] ? pci_match_device+0x107/0x110 > [ 53.765203] [] driver_probe_device+0x22/0x30 > [ 53.766893] [] __driver_attach+0x81/0xb0 > [ 53.779553] [] ? driver_probe_device+0x30/0x30 > [ 53.781281] [] ? driver_probe_device+0x30/0x30 > > git bisect start de9e203841254d3eee5e10458714f7f7e4392b82 92d21ac74a9e3c09b0b01c764e530657e4c85c49 -- > git bisect bad 180c0989372f6a358a6d75860237ace415cdf528 # 05:57 33- 46 Merge 'linux-review/William-Wu/support-rockchip-dwc3-driver/20160714-170524' into devel-hourly-2016072217 > git bisect bad 04f0a8f114cf67ab06bf853418df6d1a576d7486 # 06:06 14- 20 Merge 'linux-review/Vinod-Koul/dmaengine-ioat-statify-symbol/20160716-222642' into devel-hourly-2016072217 > git bisect good e0e414702ea3460c3633c78da48cc701f0799cca # 06:19 79+ 16 Merge 'linux-review/Nicholas-Piggin/powerpc-tm-do-not-use-r13-for-tabort_syscall/20160722-170704' into devel-hourly-2016072217 > git bisect good 3e285e0e883d0f397b155e0eb8e92beb5a7a50af # 06:29 79+ 73 Merge 'linux-review/Christoph-Hellwig/scsi-remove-current_cmnd-field-from-struct-scsi_device/20160711-123831' into devel-hourly-2016072217 > git bisect good b641e029a29a8345bcfc2c89a7133cb87b0897fd # 06:42 76+ 51 Merge 'mbroz-linux/dm-integrity' into devel-hourly-2016072217 > git bisect good 818cf195f78d78f364b790068487dcf67f2f3573 # 06:59 82+ 55 Merge 'jkirsher-next-queue/40GbE' into devel-hourly-2016072217 > git bisect good 876cfd77f56176f7ae8be9f16c534aa0268dfd4f # 07:11 78+ 78 Merge 'luto/x86/vdso' into devel-hourly-2016072217 > git bisect bad dcaffd8bb1be42f76a884512654f482836f89f11 # 07:16 13- 18 Merge 'linux-review/Alexander-Potapenko/mm-kasan-stackdepot-and-quarantine-for-SLUB/20160713-021523' into devel-hourly-2016072217 > git bisect good 287349f5b60eeb9f5a2502f5adcb472ac767ef97 # 07:28 81+ 67 Merge 'linux-review/Dmitry-Tunin/Bluetooth-Add-support-of-13d3-3490-AR3012-device/20160712-063922' into devel-hourly-2016072217 > git bisect bad 85d9adbf58cdb6eb9101f64e99e10aed5271bbef # 07:33 5- 8 mm, kasan: switch SLUB to stackdepot, enable memory quarantine for SLUB > git bisect good c840cd907d663667b32ec6ebfa2e32dac77504c6 # 07:44 77+ 62 mm, kasan: account for object redzone in SLUB's nearest_obj() > # first bad commit: [85d9adbf58cdb6eb9101f64e99e10aed5271bbef] mm, kasan: switch SLUB to stackdepot, enable memory quarantine for SLUB > git bisect good c840cd907d663667b32ec6ebfa2e32dac77504c6 # 07:50 232+ 146 mm, kasan: account for object redzone in SLUB's nearest_obj() > # extra tests with CONFIG_DEBUG_INFO_REDUCED > git bisect bad 85d9adbf58cdb6eb9101f64e99e10aed5271bbef # 07:56 4- 4 mm, kasan: switch SLUB to stackdepot, enable memory quarantine for SLUB > # extra tests on HEAD of linux-devel/devel-hourly-2016072217 > git bisect bad de9e203841254d3eee5e10458714f7f7e4392b82 # 07:57 0- 31 0day head guard for 'devel-hourly-2016072217' > # extra tests on tree/branch linux-review/Alexander-Potapenko/mm-kasan-stackdepot-and-quarantine-for-SLUB/20160713-021523 > git bisect bad 85d9adbf58cdb6eb9101f64e99e10aed5271bbef # 08:31 0- 74 mm, kasan: switch SLUB to stackdepot, enable memory quarantine for SLUB > # extra tests with first bad commit reverted > git bisect good 615b8e438ac646ab73d040830619fa6f0b81b257 # 08:48 232+ 138 Revert "mm, kasan: switch SLUB to stackdepot, enable memory quarantine for SLUB" > # extra tests on tree/branch linus/master > git bisect good 47ef4ad2684d380dd6d596140fb79395115c3950 # 08:59 231+ 237 Merge tag 'for-linus-20160715' of git://git.infradead.org/linux-mtd > # extra tests on tree/branch linux-next/master > > > This script may reproduce the error. > > ---------------------------------------------------------------------------- > #!/bin/bash > > kernel=$1 > initrd=yocto-minimal-x86_64.cgz > > wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd > > kvm=( > qemu-system-x86_64 > -enable-kvm > -cpu Haswell,+smep,+smap > -kernel $kernel > -initrd $initrd > -m 256 > -smp 1 > -device e1000,netdev=net0 > -netdev user,id=net0 > -boot order=nc > -no-reboot > -watchdog i6300esb > -rtc base=localtime > -serial stdio > -display none > -monitor null > ) > > append=( > hung_task_panic=1 > debug > apic=debug > sysrq_always_enabled > rcupdate.rcu_cpu_stall_timeout=100 > panic=-1 > softlockup_panic=1 > nmi_watchdog=panic > oops=panic > load_ramdisk=2 > prompt_ramdisk=0 > systemd.log_level=err > ignore_loglevel > earlyprintk=ttyS0,115200 > console=ttyS0,115200 > console=tty0 > vga=normal > root=/dev/ram0 > rw > drbd.minor_count=8 > ) > > "${kvm[@]}" --append "${append[*]}" When I build the kernel with your config and run the script, QEMU bails out with an error message: qemu: linux kernel too old to load a ram disk Any idea how to work around that? > ---------------------------------------------------------------------------- > > --- > 0-DAY kernel test infrastructure Open Source Technology Center > https://lists.01.org/pipermail/lkp Intel Corporation -- Alexander Potapenko Software Engineer Google Germany GmbH Erika-Mann-Straße, 33 80636 München Geschäftsführer: Matthew Scott Sucherman, Paul Terence Manicle Registergericht und -nummer: Hamburg, HRB 86891 Sitz der Gesellschaft: Hamburg