From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4FDE2A66.8000904@laposte.net> Date: Sun, 17 Jun 2012 21:05:10 +0200 From: Marc Le Douarain MIME-Version: 1.0 References: <4FCD0BD8.70103@laposte.net> <4FCD0C4D.6000004@xenomai.org> <4FD4EB23.7080203@laposte.net> <4FD4FF04.2030804@xenomai.org> <4FD61BF8.9090901@laposte.net> <4FD62635.7040501@xenomai.org> In-Reply-To: <4FD62635.7040501@xenomai.org> Content-Type: text/plain; charset="utf-8"; format="flowed" Content-Transfer-Encoding: 8bit Subject: Re: [Xenomai] "illegal instruction", then "rt_task_start()" error -38 (on a 486/no fpu) List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Xenomai Le 11/06/2012 19:09, Gilles Chanteperdrix a écrit : > I think vortex86sx has a tsc, so, you should try and modify the linux > kernel configuration to select CONFIG_X86_TSC, or simply select a > processor which has a tsc. You will get better latencies. > I've made two more tests: - compiling for Pentium-Classic (M586-TSC) => Kernel doesn't boot at all (I've seen invalid opcode, and after I-pipe stack call-trace ftrace_make_nop) - modifying arch/x86/Kconfig.cpu (there isn't any M486-TSC ! and X86-TSC can't be acceded directly!?) in config X86_TSC, adding for depends on M486 => But also kernel not working. I'm finally not sure if there is a TSC available in the Vortex86sx, perhaps only on the Vortex86dx (fpu difference only normally), or none !? Here with my previous 486 kernel, what gives /proc/cpuinfo: processor : 0 vendor_id : CyrixInstead cpu family : 4 model : 1 model name : Cx486SLC stepping : unknown fdiv_bug : yes hlt_bug : no f00f_bug : no coma_bug : no fpu : no fpu_exception : no cpuid level : -1 wp : yes flags : bogomips : 96.51 clflush size : 32 cache_alignment : 32 address sizes : 32 bits physical, 32 bits virtual power management: If could be interesting, here the kernel messages with my 486 + X86_TSC kernel: (we can see strange frequency detected by Xenomai before inits failures) [ 0.000000] Linux version 2.6.38.8-xeno_mld (marc@marc-laptop-airis) (gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3) ) #9 Sun Jun 17 14:42:40 CEST 2012 [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009fc00 (usable) [ 0.000000] BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved) [ 0.000000] BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved) [ 0.000000] BIOS-e820: 0000000000100000 - 0000000008000000 (usable) [ 0.000000] BIOS-e820: 00000000ff000000 - 0000000100000000 (reserved) [ 0.000000] Notice: NX (Execute Disable) protection missing in CPU! [ 0.000000] DMI not present or invalid. [ 0.000000] last_pfn = 0x8000 max_arch_pfn = 0x100000 [ 0.000000] init_memory_mapping: 0000000000000000-0000000008000000 [ 0.000000] 0MB HIGHMEM available. [ 0.000000] 128MB LOWMEM available. [ 0.000000] mapped low ram: 0 - 08000000 [ 0.000000] low ram: 0 - 08000000 [ 0.000000] Zone PFN ranges: [ 0.000000] DMA 0x00000010 -> 0x00001000 [ 0.000000] Normal 0x00001000 -> 0x00008000 [ 0.000000] HighMem empty [ 0.000000] Movable zone start PFN for each node [ 0.000000] early_node_map[2] active PFN ranges [ 0.000000] 0: 0x00000010 -> 0x0000009f [ 0.000000] 0: 0x00000100 -> 0x00008000 [ 0.000000] Allocating PCI resources starting at 8000000 (gap: 8000000:f7000000) [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 32399 [ 0.000000] Kernel command line: root=/dev/sda2 console=tty1 console=ttyS0,115200n8 BOOT_IMAGE=kernxeno [ 0.000000] PID hash table entries: 512 (order: -1, 2048 bytes) [ 0.000000] Dentry cache hash table entries: 16384 (order: 4, 65536 bytes) [ 0.000000] Inode-cache hash table entries: 8192 (order: 3, 32768 bytes) [ 0.000000] Initializing CPU#0 [ 0.000000] allocated 655040 bytes of page_cgroup [ 0.000000] please try 'cgroup_disable=memory' option if you don't want memory cgroups [ 0.000000] Initializing HighMem for node 0 (00000000:00000000) [ 0.000000] Memory: 120672k/131072k available (4078k kernel code, 9948k reserved, 2447k data, 488k init, 0k highmem) [ 0.000000] virtual kernel memory layout: [ 0.000000] fixmap : 0xfffe4000 - 0xfffff000 ( 108 kB) [ 0.000000] pkmap : 0xff800000 - 0xffc00000 (4096 kB) [ 0.000000] vmalloc : 0xc8800000 - 0xff7fe000 ( 879 MB) [ 0.000000] lowmem : 0xc0000000 - 0xc8000000 ( 128 MB) [ 0.000000] .init : 0xc1660000 - 0xc16da000 ( 488 kB) [ 0.000000] .data : 0xc13fbaf2 - 0xc165fac0 (2447 kB) [ 0.000000] .text : 0xc1000000 - 0xc13fbaf2 (4078 kB) [ 0.000000] Checking if this processor honours the WP bit even in supervisor mode...Ok. [ 0.000000] SLUB: Genslabs=15, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 [ 0.000000] NR_IRQS:16 nr_irqs:16 16 [ 0.000000] I-pipe 2.11-02: pipeline enabled. [ 0.000000] Console: colour dummy device 80x25 [ 0.000000] console [tty1] enabled [ 0.000000] console [ttyS0] enabled [ 0.008000] Calibrating delay loop... 96.25 BogoMIPS (lpj=192512) [ 0.084004] pid_max: default: 32768 minimum: 301 [ 0.092004] Security Framework initialized [ 0.096005] AppArmor: AppArmor initialized [ 0.104005] Mount-cache hash table entries: 512 [ 0.112006] Initializing cgroup subsys cpuacct [ 0.116006] Initializing cgroup subsys memory [ 0.124007] Initializing cgroup subsys devices [ 0.128007] Initializing cgroup subsys freezer [ 0.132007] Initializing cgroup subsys net_cls [ 0.136007] Initializing cgroup subsys blkio [ 0.144008] CPU: Cyrix Cx486SLC [ 0.148008] Checking 'hlt' instruction... OK. [ 0.168009] ftrace: allocating 17291 entries in 34 pages [ 0.188011] Performance Events: [ 0.272016] NET: Registered protocol family 16 [ 0.280016] EISA bus registered [ 0.296017] PCI: PCI BIOS revision 3.00 entry at 0xf0031, last bus=0 [ 0.300018] PCI: Using configuration type 1 for base access [ 0.376022] bio: create slab at 0 [ 0.384023] vgaarb: loaded [ 0.396024] SCSI subsystem initialized [ 0.404024] usbcore: registered new interface driver usbfs [ 0.408024] usbcore: registered new interface driver hub [ 0.416025] usbcore: registered new device driver usb [ 0.424025] PCI: Probing PCI hardware [ 0.448027] pci 0000:00:07.0: default IRQ router [17f3:6031] [ 0.452027] pci 0000:00:0a.0: address space collision: [mem 0x000e2000-0x000e2fff] conflicts with reserved [mem 0x000e0000-0x000fffff] [ 0.456027] pci 0000:00:0a.1: address space collision: [mem 0x000e3000-0x000e30ff] conflicts with reserved [mem 0x000e0000-0x000fffff] [ 0.460028] pci 0000:00:0b.0: address space collision: [mem 0x000e0000-0x000e0fff] conflicts with reserved [mem 0x000e0000-0x000fffff] [ 0.464028] pci 0000:00:0b.1: address space collision: [mem 0x000e1000-0x000e10ff] conflicts with reserved [mem 0x000e0000-0x000fffff] [ 0.472028] NetLabel: Initializing [ 0.476029] NetLabel: domain hash size = 128 [ 0.480029] NetLabel: protocols = UNLABELED CIPSOv4 [ 0.484029] NetLabel: unlabeled traffic allowed by default [ 0.488029] Switching to clocksource pit [ 0.914581] AppArmor: AppArmor Filesystem Enabled [ 0.922561] PnPBIOS: Scanning system for PnP BIOS support... [ 0.929492] PnPBIOS: Found PnP BIOS installation structure at 0xc00f3be0 [ 0.933086] PnPBIOS: PnP BIOS version 1.0, entry 0xf0000:0x45aa, dseg 0xf0000 [ 0.938563] system 00:00: [mem 0x00000000-0x0009fbff] could not be reserved [ 0.943898] system 00:00: [mem 0x0009fc00-0x0009ffff] could not be reserved [ 0.947569] system 00:00: [mem 0x000e0000-0x000fffff] could not be reserved [ 0.951234] system 00:00: [mem 0x00100000-0x07ffffff] could not be reserved [ 0.954899] system 00:00: [mem 0xff000000-0xffffffff] has been reserved [ 0.974613] system 00:08: [io 0x04d0-0x04d1] has been reserved [ 0.979824] system 00:08: [io 0x0cf8-0x0cff] could not be reserved [ 0.982805] system 00:08: [io 0xfc00-0xfc0f] has been reserved [ 0.989400] system 00:08: [io 0x0a00-0x0a0f] has been reserved [ 0.991984] system 00:08: [io 0x0a20-0x0a2f] has been reserved [ 0.994600] system 00:08: [io 0x0a10-0x0a1f] has been reserved [ 1.001249] system 00:08: [io 0x0a30-0x0a3f] has been reserved [ 1.003837] system 00:08: [io 0x0a40-0x0a4f] has been reserved [ 1.010569] system 00:08: [io 0x0a50-0x0a5f] has been reserved [ 1.026579] system 00:0c: [io 0x0a60-0x0a6f] has been reserved [ 1.034694] pnp 00:0d: disabling [io 0x03f0-0x03f5] because it overlaps 0000:00:0c.0 BAR 1 [io 0x03f4-0x03f7] [ 1.038884] PnPBIOS: 15 nodes reported by PnP BIOS; 15 recorded by driver [ 1.110586] pci 0000:00:0c.0: BAR 6: assigned [mem 0x08000000-0x0801ffff pref] [ 1.118013] pci 0000:00:0a.0: BAR 0: assigned [mem 0x08020000-0x08020fff] [ 1.121509] pci 0000:00:0a.0: BAR 0: set to [mem 0x08020000-0x08020fff] (PCI address [0x8020000-0x8020fff]) [ 1.124114] pci 0000:00:0b.0: BAR 0: assigned [mem 0x08021000-0x08021fff] [ 1.127596] pci 0000:00:0b.0: BAR 0: set to [mem 0x08021000-0x08021fff] (PCI address [0x8021000-0x8021fff]) [ 1.134201] pci 0000:00:0a.1: BAR 0: assigned [mem 0x08022000-0x080220ff] [ 1.137710] pci 0000:00:0a.1: BAR 0: set to [mem 0x08022000-0x080220ff] (PCI address [0x8022000-0x80220ff]) [ 1.140310] pci 0000:00:0b.1: BAR 0: assigned [mem 0x08022100-0x080221ff] [ 1.143788] pci 0000:00:0b.1: BAR 0: set to [mem 0x08022100-0x080221ff] (PCI address [0x8022100-0x80221ff]) [ 1.150560] NET: Registered protocol family 2 [ 1.156919] IP route cache hash table entries: 1024 (order: 0, 4096 bytes) [ 1.166597] TCP established hash table entries: 4096 (order: 3, 32768 bytes) [ 1.171227] TCP bind hash table entries: 4096 (order: 2, 16384 bytes) [ 1.175192] TCP: Hash tables configured (established 4096 bind 4096) [ 1.178652] TCP reno registered [ 1.178652] UDP hash table entries: 256 (order: 0, 4096 bytes) [ 1.184609] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes) [ 1.187610] NET: Registered protocol family 1 [ 1.198597] audit: initializing netlink socket (disabled) [ 1.206724] type=2000 audit(1339944309.204:1): initialized [ 1.438622] Xenomai has detected a CPU frequency of 0. Aborting. [ 1.446655] Xenomai: system init failed, code -19. [ 1.451993] Xenomai: native skin init failed, code -19. [ 1.457796] Xenomai: starting POSIX services. [ 1.458692] Xenomai: POSIX skin init failed, code -19. [ 1.464382] Xenomai: RTDM skin init failed, code -19. [ 1.590614] VFS: Disk quotas dquot_6.5.2 [ 1.598624] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) [ 1.622626] NTFS driver 2.1.30 [Flags: R/O]. [ 1.630604] fuse init (API version 7.16) [ 1.638628] msgmni has been set to 235 [ 1.662636] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253) [ 1.667904] io scheduler noop registered [ 1.673944] io scheduler deadline registered [ 1.674840] io scheduler cfq registered (default) [ 1.682609] isapnp: Scanning for PnP cards... [ 2.050606] isapnp: No Plug & Play device found [ 3.194715] Serial: 8250/16550 driver, 12 ports, IRQ sharing enabled [ 3.207294] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A [ 3.223603] serial8250: ttyS2 at I/O 0x3e8 (irq = 4) is a 16550A [ 3.237021] serial8250: ttyS3 at I/O 0x2e8 (irq = 3) is a 16550A [ 3.279379] 00:09: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A [ 3.297701] 00:0a: ttyS2 at I/O 0x3e8 (irq = 10) is a 16550A [ 3.312118] 00:0b: ttyS3 at I/O 0x2e8 (irq = 11) is a 16550A [ 3.378725] brd: module loaded [ 3.410729] loop: module loaded [ 3.434736] scsi0 : pata_it821x [ 3.442725] scsi1 : pata_it821x [ 3.447508] ata1: PATA max MWDMA2 cmd 0x1f0 ctl 0x3f4 bmdma 0xfff0 irq 14 [ 3.452870] ata2: PATA max MWDMA2 cmd 0x170 ctl 0x374 bmdma 0xfff8 irq 14 [ 3.486714] Fixed MDIO Bus: probed [ 3.494704] r6040: RDC R6040 NAPI net driver,version 0.28 (07Oct2011) [ 3.514698] r6040_eth_mii: probed [ 3.519193] r6040 0000:00:08.0: attached PHY driver [Generic PHY] (mii_bus:phy_addr=0000:00:08.0-0:01) [ 3.530740] PPP generic driver version 2.4.2 [ 3.538688] tun: Universal TUN/TAP device driver, 1.6 [ 3.542763] tun: (C) 1999-2004 Max Krasnyansky [ 3.550721] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 3.557673] ehci_hcd 0000:00:0a.1: EHCI Host Controller [ 3.562736] ehci_hcd 0000:00:0a.1: new USB bus registered, assigned bus number 1 [ 3.590727] ehci_hcd 0000:00:0a.1: irq 5, io mem 0x08022000 [ 3.606728] ehci_hcd 0000:00:0a.1: USB 2.0 started, EHCI 1.00 [ 3.614731] hub 1-0:1.0: USB hub found [ 3.622700] hub 1-0:1.0: 2 ports detected [ 3.628965] ata1.00: CFA: InnoDisk Corp. - iCF4000 512MB, 100511B, max UDMA/66 [ 3.633922] ata1.00: 1009008 sectors, multi 0: LBA [ 3.635377] ata1.00: configured for MWDMA2 [ 3.642731] scsi 0:0:0:0: Direct-Access ATA InnoDisk Corp. - 1005 PQ: 0 ANSI: 5 [ 3.647019] ehci_hcd 0000:00:0b.1: EHCI Host Controller [ 3.654801] sd 0:0:0:0: Attached scsi generic sg0 type 0 [ 3.659914] sd 0:0:0:0: [sda] 1009008 512-byte logical blocks: (516 MB/492 MiB) [ 3.666735] ehci_hcd 0000:00:0b.1: new USB bus registered, assigned bus number 2 [ 3.678761] sd 0:0:0:0: [sda] Write Protect is off [ 3.686731] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA [ 3.702758] ehci_hcd 0000:00:0b.1: irq 9, io mem 0x08022100 [ 3.714835] invalid opcode: 0000 [#1] [ 3.714835] last sysfs file: [ 3.714835] Modules linked in: [ 3.714835] [ 3.714835] Pid: 3, comm: ksoftirqd/0 Not tainted 2.6.38.8-xeno_mld #9 [ 3.714835] EIP: 0060:[] EFLAGS: 00000287 CPU: 0 [ 3.714835] EIP is at add_timer_randomness+0x3c/0xf0 [ 3.714835] EAX: fffedea9 EBX: c79cfac0 ECX: 00800100 EDX: 00800100 [ 3.714835] ESI: 00000000 EDI: 00000000 EBP: c780becc ESP: c780beb4 [ 3.714835] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 [ 3.714835] Process ksoftirqd/0 (pid: 3, ti=c780a000 task=c7849900 task.ti=c7858000) [ 3.714835] I-pipe domain Linux [ 3.714835] Stack: [ 3.714835] 00000000 00000000 c7a023a0 fffedea9 00001000 c7a023a0 c780bed4 c12773d9 [ 3.714835] c780bee8 c1211f90 00000000 c7a023a0 00000000 c780befc c1212171 00000000 [ 3.714835] c780ea00 c7a023a0 c780bf50 c12910d0 fffffff1 c780007b c102007b c7840000 [ 3.714835] Call Trace: [ 3.714835] [] add_disk_randomness+0x29/0x30 [ 3.714835] [] blk_update_bidi_request+0x60/0x80 [ 3.714835] [] blk_end_request+0x21/0x50 [ 3.714835] [] scsi_io_completion+0x90/0x520 [ 3.714835] [] ? __enqueue_entity+0xb/0xc0 [ 3.714835] [] ? __xirq_end+0x0/0x3c [ 3.714835] [] ? __ipipe_restore_root+0x1d/0x30 [ 3.714835] [] scsi_finish_command+0x9a/0xf0 [ 3.714835] [] ? scsi_decide_disposition+0x184/0x1b0 [ 3.714835] [] scsi_softirq_done+0x118/0x140 [ 3.714835] [] ? __do_softirq+0x0/0x190 [ 3.714835] [] blk_done_softirq+0x68/0x80 [ 3.714835] [] __do_softirq+0x78/0x190 [ 3.714835] [] ? common_interrupt+0x29/0x40 [ 3.714835] [] ? raise_softirq+0xc0/0xd0 [ 3.714835] [] ? __do_softirq+0x0/0x190 [ 3.714835] [ 3.714835] [] ? irq_exit+0x65/0x70 [ 3.714835] [] ? do_IRQ+0x48/0x94 [ 3.714835] [] ? irq_exit+0x37/0x70 [ 3.714835] [] ? do_IRQ+0x48/0x94 [ 3.714835] [] ? __ipipe_sync_stage+0xef/0xf4 [ 3.714835] [] ? do_IRQ+0x0/0x94 [ 3.714835] [] ? __xirq_end+0x0/0x3c [ 3.714835] [] ? __ipipe_unstall_root+0x22/0x30 [ 3.714835] [] ? finish_task_switch.isra.145+0x2f/0x80 [ 3.714835] [] ? schedule+0x2f7/0x6a0 [ 3.714835] [] ? schedule+0x2f7/0x6a0 [ 3.714835] [] ? default_wake_function+0x10/0x20 [ 3.714835] [] ? __cond_resched+0x1b/0x30 [ 3.714835] [] ? _cond_resched+0x29/0x30 [ 3.714835] [] ? run_ksoftirqd+0x55/0xc0 [ 3.714835] [] ? run_ksoftirqd+0x0/0xc0 [ 3.714835] [] ? kthread+0x6c/0x80 [ 3.714835] [] ? kthread+0x0/0x80 [ 3.714835] [] ? kernel_thread_helper+0x6/0x10 [ 3.714835] Code: 65 c1 89 d1 39 05 38 36 64 c1 7e 17 b8 01 00 00 00 0f c1 05 4c 36 64 c1 a9 ff 0f 00 00 0f 85 9f 00 00 00 a1 c8 ac 61 c1 89 45 f4 <0f> 31 89 45 ec b8 20 36 64 c1 89 55 f0 8d 55 ec 89 4d f8 b9 10 [ 3.714835] EIP: [] add_timer_randomness+0x3c/0xf0 SS:ESP 0068:c780beb4 [ 3.720096] ---[ end trace c0c72ecfd80ce698 ]--- [ 3.725356] Kernel panic - not syncing: Fatal exception in interrupt [ 3.728275] Pid: 3, comm: ksoftirqd/0 Tainted: G D 2.6.38.8-xeno_mld #9 [ 3.732379] Call Trace: [ 3.735254] [] ? panic+0x5c/0x145 [ 3.740104] [] ? oops_end+0xb9/0xc0 [ 3.745142] [] ? die+0x54/0x80 [ 3.749729] [] ? do_trap+0x96/0xd0 [ 3.754802] [] ? do_invalid_op+0x8b/0xa0 [ 3.760264] [] ? add_timer_randomness+0x3c/0xf0 [ 3.766369] [] ? wake_bit_function+0x59/0x60 [ 3.768226] [] ? __wake_up_common+0x47/0x70 [ 3.773966] [] ? __ipipe_restore_root+0x1d/0x30 [ 3.776067] [] ? kmem_cache_free+0xcf/0xf0 [ 3.781718] [] ? mempool_free_slab+0x13/0x20 [ 3.783550] [] ? mempool_free_slab+0x13/0x20 [ 3.789388] [] ? mempool_free+0x5d/0xe0 [ 3.790791] [] ? __ipipe_handle_exception+0xc8/0x240 [ 3.797334] [] ? bio_free+0x4c/0x50 [ 3.802386] [] ? error_code+0x5d/0x70 [ 3.803623] [] ? ftrace_define_fields_block_bio+0x50/0x1b0 [ 3.806739] [] ? add_timer_randomness+0x3c/0xf0 [ 3.812857] [] ? add_disk_randomness+0x29/0x30 [ 3.814899] [] ? blk_update_bidi_request+0x60/0x80 [ 3.821265] [] ? blk_end_request+0x21/0x50 [ 3.822927] [] ? scsi_io_completion+0x90/0x520 [ 3.828932] [] ? __enqueue_entity+0xb/0xc0 [ 3.834728] [] ? __xirq_end+0x0/0x3c [ 3.839841] [] ? __ipipe_restore_root+0x1d/0x30 [ 3.845948] [] ? scsi_finish_command+0x9a/0xf0 [ 3.847995] [] ? scsi_decide_disposition+0x184/0x1b0 [ 3.854758] [] ? scsi_softirq_done+0x118/0x140 [ 3.860751] [] ? __do_softirq+0x0/0x190 [ 3.866151] [] ? blk_done_softirq+0x68/0x80 [ 3.867905] [] ? __do_softirq+0x78/0x190 [ 3.873391] [] ? common_interrupt+0x29/0x40 [ 3.875119] [] ? raise_softirq+0xc0/0xd0 [ 3.880593] [] ? __do_softirq+0x0/0x190 [ 3.885983] [] ? irq_exit+0x65/0x70 [ 3.891845] [] ? do_IRQ+0x48/0x94 [ 3.896718] [] ? irq_exit+0x37/0x70 [ 3.901745] [] ? do_IRQ+0x48/0x94 [ 3.906743] [] ? __ipipe_sync_stage+0xef/0xf4 [ 3.912666] [] ? do_IRQ+0x0/0x94 [ 3.917445] [] ? __xirq_end+0x0/0x3c [ 3.922712] [] ? __ipipe_unstall_root+0x22/0x30 [ 3.928810] [] ? finish_task_switch.isra.145+0x2f/0x80 [ 3.931563] [] ? schedule+0x2f7/0x6a0 [ 3.936787] [] ? schedule+0x2f7/0x6a0 [ 3.942007] [] ? default_wake_function+0x10/0x20 [ 3.944257] [] ? __cond_resched+0x1b/0x30 [ 3.949879] [] ? _cond_resched+0x29/0x30 [ 3.951354] [] ? run_ksoftirqd+0x55/0xc0 [ 3.956831] [] ? run_ksoftirqd+0x0/0xc0 [ 3.962217] [] ? kthread+0x6c/0x80 [ 3.963158] [] ? kthread+0x0/0x80 [ 3.968012] [] ? kernel_thread_helper+0x6/0x10