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Message-Id: <1161847210.32585.14.camel@Homer.simpson.net> Date: Thu, 26 Oct 2006 07:20:10 +0000 From: Mike Galbraith <efault@....de> To: LKML <linux-kernel@...r.kernel.org> Cc: john stultz <johnstul@...ibm.com> Subject: [2.6.18-rt7] BUG: time warp detected! Greetings, $subject happened on my single P4/HT box sometime after resume from disk. Hohum activity: I had just read lkml and was retrieving latest glibc snapshot when I noticed the trace. I also noticed that the kernel decided to use pit instead of tsc. Linux version 2.6.18-rt7-smp (root@...er) (gcc version 4.1.2 20060920 (prerelease) (SUSE Linux)) #184 SMP PREEMPT Sun Oct 22 05:57:53 Local time zone must be set BIOS-provided physical RAM map: BIOS-e820: 0000000000000000 - 000000000009fc00 (usable) BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved) BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved) BIOS-e820: 0000000000100000 - 000000003fff0000 (usable) BIOS-e820: 000000003fff0000 - 000000003fff3000 (ACPI NVS) BIOS-e820: 000000003fff3000 - 0000000040000000 (ACPI data) BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved) 0MB HIGHMEM available. 1023MB LOWMEM available. found SMP MP-table at 000f5320 On node 0 totalpages: 262128 DMA zone: 4096 pages, LIFO batch:0 Normal zone: 258032 pages, LIFO batch:31 DMI 2.3 present. ACPI: RSDP (v000 IntelR ) @ 0x000f6cc0 ACPI: RSDT (v001 IntelR AWRDACPI 0x42302e31 AWRD 0x00000000) @ 0x3fff3000 ACPI: FADT (v001 IntelR AWRDACPI 0x42302e31 AWRD 0x00000000) @ 0x3fff3040 ACPI: MADT (v001 IntelR AWRDACPI 0x42302e31 AWRD 0x00000000) @ 0x3fff7200 ACPI: DSDT (v001 INTELR AWRDACPI 0x00001000 MSFT 0x0100000e) @ 0x00000000 ACPI: Local APIC address 0xfee00000 ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled) Processor #0 15:2 APIC version 20 ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled) Processor #1 15:2 APIC version 20 ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1]) ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1]) ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0]) IOAPIC[0]: apic_id 2, version 32, address 0xfec00000, GSI 0-23 ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl) ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level) ACPI: IRQ0 used by override. ACPI: IRQ2 used by override. ACPI: IRQ9 used by override. Enabling APIC mode: Flat. Using 1 I/O APICs Using ACPI (MADT) for SMP configuration information Allocating PCI resources starting at 50000000 (gap: 40000000:bec00000) Detected 2992.611 MHz processor. Real-Time Preemption Support (C) 2004-2006 Ingo Molnar Built 1 zonelists. Total pages: 262128 Kernel command line: root=/dev/hdc3 vga=0x314 resume=/dev/hdc2 console=ttyS0,115200n8 console=tty profile=1 kernel profiling enabled (shift: 1) mapped APIC to ffffd000 (fee00000) mapped IOAPIC to ffffc000 (fec00000) Enabling fast FPU save and restore... done. Enabling unmasked SIMD FPU exception support... done. Initializing CPU#0 WARNING: experimental RCU implementation. Clock event device pit configured with caps set: 07 CPU 0 irqstacks, hard=b15cd000 soft=b15c5000 PID hash table entries: 4096 (order: 12, 16384 bytes) Console: colour dummy device 80x25 Dentry cache hash table entries: 131072 (order: 7, 524288 bytes) Inode-cache hash table entries: 65536 (order: 6, 262144 bytes) Memory: 1015040k/1048512k available (3773k kernel code, 33084k reserved, 1289k data, 240k init, 0k highmem) Checking if this processor honours the WP bit even in supervisor mode... Ok. Calibrating delay using timer specific routine.. 5986.97 BogoMIPS (lpj=2993488) Security Framework v1.0.0 initialized SELinux: Disabled at boot. Capability LSM initialized Mount-cache hash table entries: 512 CPU: After generic identify, caps: bfebfbff 00000000 00000000 00000000 00004400 00000000 00000000 CPU: After vendor identify, caps: bfebfbff 00000000 00000000 00000000 00004400 00000000 00000000 CPU: Trace cache: 12K uops, L1 D cache: 8K CPU: L2 cache: 512K CPU: Physical Processor ID: 0 CPU: After all inits, caps: bfebfbff 00000000 00000000 00000080 00004400 00000000 00000000 Intel machine check architecture supported. Intel machine check reporting enabled on CPU#0. CPU0: Intel P4/Xeon Extended MCE MSRs (12) available CPU0: Thermal monitoring enabled Compat vDSO mapped to ffffe000. Checking 'hlt' instruction... OK. SMP alternatives: switching to UP code ACPI: Core revision 20060707 CPU0: Intel(R) Pentium(R) 4 CPU 3.00GHz stepping 09 SMP alternatives: switching to SMP code Booting processor 1/1 eip 3000 CPU 1 irqstacks, hard=b15ce000 soft=b15c6000 Initializing CPU#1 Calibrating delay using timer specific routine.. 5984.19 BogoMIPS (lpj=2992096) CPU: After generic identify, caps: bfebfbff 00000000 00000000 00000000 00004400 00000000 00000000 CPU: After vendor identify, caps: bfebfbff 00000000 00000000 00000000 00004400 00000000 00000000 CPU: Trace cache: 12K uops, L1 D cache: 8K CPU: L2 cache: 512K CPU: Physical Processor ID: 0 CPU: After all inits, caps: bfebfbff 00000000 00000000 00000080 00004400 00000000 00000000 Intel machine check architecture supported. Intel machine check reporting enabled on CPU#1. CPU1: Intel P4/Xeon Extended MCE MSRs (12) available CPU1: Thermal monitoring enabled CPU1: Intel(R) Pentium(R) 4 CPU 3.00GHz stepping 09 Total of 2 processors activated (11971.16 BogoMIPS). ENABLING IO-APIC IRQs ..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1 Clock event device pit new caps set: 01 Clock event device lapic configured with caps set: 06 checking TSC synchronization across 2 CPUs: passed. Clock event device pit new caps set: 01 Clock event device lapic configured with caps set: 06 Brought up 2 CPUs ... Starting balanced_irq Using IPI No-Shortcut mode Time: pit clocksource has been installed. ... BUG: time warp detected! prev > now, 101faf80ccb64133 > 101faf80ccb64132: = 1 delta, on CPU#0 [<b10041fb>] show_trace_log_lvl+0x179/0x18f [<b10048bd>] show_trace+0x12/0x14 [<b10049de>] dump_stack+0x19/0x1b [<b102c0cc>] do_gettimeofday+0x19e/0x1c7 [<b12bacc5>] evdev_event+0xea/0x167 [<b12b6f25>] input_event+0xc5/0x467 [<b12b24f6>] hidinput_report_event+0x34/0x5e [<b12ad115>] hid_input_report+0x286/0x3a1 [<b12ae791>] hid_irq_in+0x4b/0x118 [<b1296800>] usb_hcd_giveback_urb+0x1a/0x4f [<b12a7077>] uhci_giveback_urb+0x80/0x171 [<b12a77e0>] uhci_scan_schedule+0x57a/0x8cf [<b12a988b>] uhci_irq+0x6d/0x162 [<b12973b6>] usb_hcd_irq+0x27/0x56 [<b104f9d5>] handle_IRQ_event+0x5e/0xdb [<b104fef7>] thread_simple_irq+0x4b/0x85 [<b10507d5>] do_irqd+0x2a9/0x314 [<b1035f79>] kthread+0xe4/0xe8 [<b1001005>] kernel_thread_helper+0x5/0xb DWARF2 unwinder stuck at kernel_thread_helper+0x5/0xb Leftover inexact backtrace: [<b10048bd>] show_trace+0x12/0x14 [<b10049de>] dump_stack+0x19/0x1b [<b102c0cc>] do_gettimeofday+0x19e/0x1c7 [<b12bacc5>] evdev_event+0xea/0x167 [<b12b6f25>] input_event+0xc5/0x467 [<b12b24f6>] hidinput_report_event+0x34/0x5e [<b12ad115>] hid_input_report+0x286/0x3a1 [<b12ae791>] hid_irq_in+0x4b/0x118 [<b1296800>] usb_hcd_giveback_urb+0x1a/0x4f [<b12a7077>] uhci_giveback_urb+0x80/0x171 [<b12a77e0>] uhci_scan_schedule+0x57a/0x8cf [<b12a988b>] uhci_irq+0x6d/0x162 [<b12973b6>] usb_hcd_irq+0x27/0x56 [<b104f9d5>] handle_IRQ_event+0x5e/0xdb [<b104fef7>] thread_simple_irq+0x4b/0x85 [<b10507d5>] do_irqd+0x2a9/0x314 [<b1035f79>] kthread+0xe4/0xe8 [<b1001005>] kernel_thread_helper+0x5/0xb - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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