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From devnull@lkml.org Sat Apr 27 03:55:30 2024 Delivery-date: Wed, 22 Dec 2010 16:14:53 +0100 Received: from virgo.iok.hu ([212.40.97.103]:52499 "EHLO virgo.iok.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752763Ab0LVPOi (ORCPT ); Wed, 22 Dec 2010 10:14:38 -0500 Received: from kag.elte.hu (kag.elte.hu [157.181.177.1]) by virgo.iok.hu (Postfix) with ESMTP id 6931E580BD; Wed, 22 Dec 2010 16:14:34 +0100 (CET) Received: from genesis.frugalware.org (frugalware.elte.hu [157.181.177.34]) by kag.elte.hu (Postfix) with ESMTP id 4DDA844659; Wed, 22 Dec 2010 16:14:34 +0100 (CET) Received: by genesis.frugalware.org (Postfix, from userid 1000) id 3F3E8132C39C; Wed, 22 Dec 2010 16:14:34 +0100 (CET) Date: Wed, 22 Dec 2010 16:14:34 +0100 From: Miklos Vajna To: Peter Zijlstra Cc: Mike Galbraith , shenghui , kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@elte.hu, Greg KH Subject: Re: [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Message-Id: <20101222151434.GW10557@genesis.frugalware.org> References: <1277808215.1868.5.camel@laptop> <20101219020313.GJ31750@genesis.frugalware.org> <20101222002248.GP10557@genesis.frugalware.org> <1293006589.2170.41.camel@laptop> <1293007311.11370.172.camel@ Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="p6hDAtPN9q+ZnUca" Content-Disposition: inline In-Reply-To: <1293027112.2170.140.camel@laptop> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-Id: X-Mailing-List: linux-kernel@vger.kernel.org --p6hDAtPN9q+ZnUca Content-Type: multipart/mixed; boundary="OwXh6gFRjCd3qPCM" Content-Disposition: inline --OwXh6gFRjCd3qPCM Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Dec 22, 2010 at 03:11:52PM +0100, Peter Zijlstra wrote: > > I started it with something like:=20 > > qemu -kernel foo-build/arch/x86/boot/bzImage -append "root=3D/dev/sda1 > > debug sched_debug ignore_loglevel sysrq_always_enabled console=3DttyS0" > > -hda systemd.img -serial stdio -m 1G > >=20 > > Where foo-build/ contains a kernel build using your .config. > >=20 > > I'll have a poke at it.. >=20 > Hrm,. its not really wanting to start properly.. >=20 > --- > EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null) > VFS: Mounted root (ext4 filesystem) readonly on device 8:1. > Freeing unused kernel memory: 520k freed > EXT4-fs (sda1): re-mounted. Opts: (null) > md: stopping all md devices. > Restarting system. > machine restart > --- >=20 > Does it _require_ initrd like muck? Or are there some modules that need > to get built-in in order for the thing to boot? Nope. > This is an utter lack of error reporting here, no idea what's wrong. I tried to do something really similar to your commandline: qemu -enable-kvm -kernel kernel-build/arch/x86/boot/bzImage -append "root= =3D/dev/sda1 debug sched_debug ignore_loglevel sysrq_always_enabled console= =3DttyS0" -hda systemd.img -serial stdio -m 1G -vnc :0 This boots up properly here, I can login using root/root from vnc. qemu -enable-kvm -kernel kernel-build/arch/x86/boot/bzImage -append "root= =3D/dev/sda1 debug sched_debug ignore_loglevel sysrq_always_enabled console= =3DttyS0 init=3D/bin/systemd" -hda systemd.img -serial stdio -m 1G -vnc :0 ^ Only init=3D/bin/systemd added, and this results in a panic in most cases. I'm attaching the stdout of qemu, showing the fail in put_prev_task_fair. $ qemu -version QEMU emulator version 0.13.0, Copyright (c) 2003-2008 Fabrice Bellard kernel-build is a git build using the config I already sent and after a 'git checkout v2.6.36'. I can try to build master as well, so far what I saw is that the bug occurs there as well, but less frequently, so maybe that's a bit harder to debug. I also want to note that - at least on my machine - if I drop -enable-kvm the bug is hard to reproduce, maybe that's because that way it does not trigger a race condition or my machine is just too slow without kvm and it triggers some timeout, changing the behaviour; I'm not exactly sure. (But again, I can reproduce the bug on real hardware, so I don't think we have a kvm bug here.) Thanks, Miklos --OwXh6gFRjCd3qPCM Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: attachment; filename="qemu.log" Content-Transfer-Encoding: quoted-printable Initializing cgroup subsys cpuset=0D Initializing cgroup subsys cpu=0D Linux version 2.6.36 (vmiklos@helicon) (gcc version 4.5.2 (Frugalware Linux= ) ) #1 SMP PREEMPT Wed Dec 22 15:37:51 CET 2010=0D BIOS-provided physical RAM map:=0D BIOS-e820: 0000000000000000 - 000000000009f400 (usable)=0D BIOS-e820: 000000000009f400 - 00000000000a0000 (reserved)=0D BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)=0D BIOS-e820: 0000000000100000 - 000000003fffd000 (usable)=0D BIOS-e820: 000000003fffd000 - 0000000040000000 (reserved)=0D BIOS-e820: 00000000fffbc000 - 0000000100000000 (reserved)=0D debug: ignoring loglevel setting.=0D Notice: NX (Execute Disable) protection missing in CPU or disabled in BIOS!= =0D DMI 2.4 present.=0D e820 update range: 0000000000000000 - 0000000000001000 (usable) =3D=3D> (re= served)=0D e820 remove range: 00000000000a0000 - 0000000000100000 (usable)=0D last_pfn =3D 0x3fffd max_arch_pfn =3D 0x100000=0D e820 update range: 0000000000002000 - 0000000000010000 (usable) =3D=3D> (re= served)=0D Scanning 1 areas for low memory corruption=0D modified physical RAM map:=0D modified: 0000000000000000 - 0000000000001000 (reserved)=0D modified: 0000000000001000 - 0000000000002000 (usable)=0D modified: 0000000000002000 - 0000000000010000 (reserved)=0D modified: 0000000000010000 - 000000000009f400 (usable)=0D modified: 000000000009f400 - 00000000000a0000 (reserved)=0D modified: 00000000000f0000 - 0000000000100000 (reserved)=0D modified: 0000000000100000 - 000000003fffd000 (usable)=0D modified: 000000003fffd000 - 0000000040000000 (reserved)=0D modified: 00000000fffbc000 - 0000000100000000 (reserved)=0D initial memory mapped : 0 - 01c00000=0D found SMP MP-table at [c00fdc00] fdc00=0D init_memory_mapping: 0000000000000000-00000000377fe000=0D 0000000000 - 0000400000 page 4k=0D 0000400000 - 0037400000 page 2M=0D 0037400000 - 00377fe000 page 4k=0D kernel direct mapping tables up to 377fe000 @ 15000-1a000=0D ACPI: RSDP 000fdbb0 00014 (v00 BOCHS )=0D ACPI: RSDT 3fffde30 00034 (v01 BOCHS BXPCRSDT 00000001 BXPC 00000001)=0D ACPI: FACP 3ffffe70 00074 (v01 BOCHS BXPCFACP 00000001 BXPC 00000001)=0D ACPI: DSDT 3fffdfd0 01E22 (v01 BXPC BXDSDT 00000001 INTL 20090123)=0D ACPI: FACS 3ffffe00 00040=0D ACPI: SSDT 3fffdf90 00037 (v01 BOCHS BXPCSSDT 00000001 BXPC 00000001)=0D ACPI: APIC 3fffdeb0 00072 (v01 BOCHS BXPCAPIC 00000001 BXPC 00000001)=0D ACPI: HPET 3fffde70 00038 (v01 BOCHS BXPCHPET 00000001 BXPC 00000001)=0D ACPI: Local APIC address 0xfee00000=0D 135MB HIGHMEM available.=0D 887MB LOWMEM available.=0D mapped low ram: 0 - 377fe000=0D low ram: 0 - 377fe000=0D kvm-clock: Using msrs 12 and 11=0D kvm-clock: cpu 0, msr 0:17b2b91, boot clock=0D Zone PFN ranges:=0D DMA 0x00000001 -> 0x00001000=0D Normal 0x00001000 -> 0x000377fe=0D HighMem 0x000377fe -> 0x0003fffd=0D Movable zone start PFN for each node=0D early_node_map[3] active PFN ranges=0D 0: 0x00000001 -> 0x00000002=0D 0: 0x00000010 -> 0x0000009f=0D 0: 0x00000100 -> 0x0003fffd=0D On node 0 totalpages: 262029=0D free_area_init_node: node 0, pgdat c1725620, node_mem_map c1848020=0D DMA zone: 32 pages used for memmap=0D DMA zone: 0 pages reserved=0D DMA zone: 3952 pages, LIFO batch:0=0D Normal zone: 1744 pages used for memmap=0D Normal zone: 221486 pages, LIFO batch:31=0D HighMem zone: 272 pages used for memmap=0D HighMem zone: 34543 pages, LIFO batch:7=0D Using APIC driver default=0D ACPI: PM-Timer IO Port: 0xb008=0D ACPI: Local APIC address 0xfee00000=0D ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)=0D ACPI: IOAPIC (id[0x01] address[0xfec00000] gsi_base[0])=0D IOAPIC[0]: apic_id 1, version 17, address 0xfec00000, GSI 0-23=0D ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)=0D ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)=0D ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)=0D ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)=0D ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)=0D ACPI: IRQ0 used by override.=0D ACPI: IRQ2 used by override.=0D ACPI: IRQ5 used by override.=0D ACPI: IRQ9 used by override.=0D ACPI: IRQ10 used by override.=0D ACPI: IRQ11 used by override.=0D Using ACPI (MADT) for SMP configuration information=0D ACPI: HPET id: 0x8086a201 base: 0xfed00000=0D SMP: Allowing 1 CPUs, 0 hotplug CPUs=0D nr_irqs_gsi: 40=0D PM: Registered nosave memory: 0000000000002000 - 0000000000010000=0D early_res array is doubled to 64 at [16000 - 167ff]=0D PM: Registered nosave memory: 000000000009f000 - 00000000000a0000=0D PM: Registered nosave memory: 00000000000a0000 - 00000000000f0000=0D PM: Registered nosave memory: 00000000000f0000 - 0000000000100000=0D Allocating PCI resources starting at 40000000 (gap: 40000000:bffbc000)=0D Booting paravirtualized kernel on KVM=0D setup_percpu: NR_CPUS:8 nr_cpumask_bits:8 nr_cpu_ids:1 nr_node_ids:1=0D PERCPU: Embedded 14 pages/cpu @c2400000 s33296 r0 d24048 u4194304=0D pcpu-alloc: s33296 r0 d24048 u4194304 alloc=3D1*4194304=0D pcpu-alloc: [0] 0 =0D kvm-clock: cpu 0, msr 0:2407b91, primary cpu clock=0D Built 1 zonelists in Zone order, mobility grouping on. Total pages: 259981= =0D Kernel command line: root=3D/dev/sda1 debug sched_debug ignore_loglevel sys= rq_always_enabled console=3DttyS0 init=3D/bin/systemd=0D PID hash table entries: 4096 (order: 2, 16384 bytes)=0D Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)=0D Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)=0D Enabling fast FPU save and restore... done.=0D Enabling unmasked SIMD FPU exception support... done.=0D Initializing CPU#0=0D allocated 5242800 bytes of page_cgroup=0D please try 'cgroup_disable=3Dmemory' option if you don't want memory cgroup= s=0D Subtract (43 early reservations)=0D #1 [0000001000 - 0000002000] EX TRAMPOLINE=0D #2 [0001000000 - 000183e7c4] TEXT DATA BSS=0D #3 [000183f000 - 0001846049] BRK=0D #4 [000009f400 - 00000fdc00] BIOS reserved=0D #5 [00000fdc00 - 00000fdc10] MP-table mpf=0D #6 [00000fdcf0 - 0000100000] BIOS reserved=0D #7 [00000fdc10 - 00000fdcf0] MP-table mpc=0D #8 [0000010000 - 0000011000] TRAMPOLINE=0D #9 [0000011000 - 0000015000] ACPI WAKEUP=0D #10 [0000015000 - 0000016000] PGTABLE=0D #11 [0001847000 - 0001848000] BOOTMEM=0D #12 [0001848000 - 0002048000] BOOTMEM=0D #13 [000183e7d0 - 000183e7d4] BOOTMEM=0D #14 [000183e7e0 - 000183e8a0] BOOTMEM=0D #15 [000183e8a0 - 000183e8f4] BOOTMEM=0D #16 [0002048000 - 000204b000] BOOTMEM=0D #17 [000183e900 - 000183e910] BOOTMEM=0D #18 [0001846050 - 0001846c50] BOOTMEM=0D #19 [000183e910 - 000183e935] BOOTMEM=0D #20 [000183e940 - 000183e967] BOOTMEM=0D #21 [000183e970 - 000183ea6c] BOOTMEM=0D #22 [000183ea70 - 000183eab0] BOOTMEM=0D #23 [000183eab0 - 000183eaf0] BOOTMEM=0D #24 [000183eaf0 - 000183eb30] BOOTMEM=0D #25 [000183eb30 - 000183eb70] BOOTMEM=0D #26 [000183eb70 - 000183ebb0] BOOTMEM=0D #27 [000183ebb0 - 000183ebf0] BOOTMEM=0D #28 [000183ebf0 - 000183ec00] BOOTMEM=0D #29 [000183ec00 - 000183ec10] BOOTMEM=0D #30 [000183ec10 - 000183ec76] BOOTMEM=0D #31 [000183ec80 - 000183ece6] BOOTMEM=0D #32 [0002400000 - 000240e000] BOOTMEM=0D #33 [000183ecf0 - 000183ecf4] BOOTMEM=0D #34 [000183ed00 - 000183ed04] BOOTMEM=0D #35 [000183ed10 - 000183ed14] BOOTMEM=0D #36 [000183ed20 - 000183ed24] BOOTMEM=0D #37 [000183ed30 - 000183ede0] BOOTMEM=0D #38 [000183ede0 - 000183ee88] BOOTMEM=0D #39 [000204b000 - 000204f000] BOOTMEM=0D #40 [000204f000 - 00020cf000] BOOTMEM=0D #41 [00020cf000 - 000210f000] BOOTMEM=0D #42 [000240e000 - 000290dfb0] BOOTMEM=0D Initializing HighMem for node 0 (000377fe:0003fffd)=0D Memory: 1025444k/1048564k available (5423k kernel code, 22672k reserved, 19= 60k data, 504k init, 139260k highmem)=0D virtual kernel memory layout:=0D fixmap : 0xfff17000 - 0xfffff000 ( 928 kB)=0D pkmap : 0xff800000 - 0xffc00000 (4096 kB)=0D vmalloc : 0xf7ffe000 - 0xff7fe000 ( 120 MB)=0D lowmem : 0xc0000000 - 0xf77fe000 ( 887 MB)=0D .init : 0xc1736000 - 0xc17b4000 ( 504 kB)=0D .data : 0xc154bd93 - 0xc1735dcc (1960 kB)=0D .text : 0xc1000000 - 0xc154bd93 (5423 kB)=0D Checking if this processor honours the WP bit even in supervisor mode...Ok.= =0D SLUB: Genslabs=3D13, HWalign=3D32, Order=3D0-3, MinObjects=3D0, CPUs=3D1, N= odes=3D1=0D Hierarchical RCU implementation.=0D RCU-based detection of stalled CPUs is disabled.=0D Verbose stalled-CPUs detection is disabled.=0D NR_IRQS:2304 nr_irqs:256=0D Console: colour VGA+ 80x25=0D console [ttyS0] enabled=0D hpet clockevent registered=0D Detected 2665.754 MHz processor.=0D Calibrating delay loop (skipped) preset value.. 5331.50 BogoMIPS (lpj=3D266= 5754)=0D pid_max: default: 32768 minimum: 301=0D Security Framework initialized=0D AppArmor: AppArmor disabled by boot time parameter=0D Mount-cache hash table entries: 512=0D Initializing cgroup subsys ns=0D Initializing cgroup subsys cpuacct=0D Initializing cgroup subsys memory=0D Initializing cgroup subsys devices=0D Initializing cgroup subsys freezer=0D Performance Events: p6 PMU driver.=0D =2E.. version: 0=0D =2E.. bit width: 32=0D =2E.. generic registers: 2=0D =2E.. value mask: 00000000ffffffff=0D =2E.. max period: 000000007fffffff=0D =2E.. fixed-purpose events: 0=0D =2E.. event mask: 0000000000000003=0D SMP alternatives: switching to UP code=0D Freeing SMP alternatives: 24k freed=0D ACPI: Core revision 20100702=0D Enabling APIC mode: Flat. Using 1 I/O APICs=0D =2E.TIMER: vector=3D0x30 apic1=3D0 pin1=3D2 apic2=3D-1 pin2=3D-1=0D CPU0: Intel QEMU Virtual CPU version 0.13.0 stepping 03=0D Brought up 1 CPUs=0D Total of 1 processors activated (5331.50 BogoMIPS).=0D devtmpfs: initialized=0D xor: automatically using best checksumming function: pIII_sse=0D pIII_sse : 7564.000 MB/sec=0D xor: using function: pIII_sse (7564.000 MB/sec)=0D regulator: core version 0.5=0D NET: Registered protocol family 16=0D EISA bus registered=0D ACPI: bus type pci registered=0D PCI: Using configuration type 1 for base access=0D bio: create slab at 0=0D raid6: int32x1 941 MB/s=0D raid6: int32x2 878 MB/s=0D raid6: int32x4 757 MB/s=0D raid6: int32x8 644 MB/s=0D raid6: mmxx1 3105 MB/s=0D raid6: mmxx2 3484 MB/s=0D raid6: sse1x1 1964 MB/s=0D raid6: sse1x2 2550 MB/s=0D raid6: sse2x1 3566 MB/s=0D raid6: sse2x2 4328 MB/s=0D raid6: using algorithm sse2x2 (4328 MB/s)=0D ACPI: EC: Look up EC in DSDT=0D ACPI: Interpreter enabled=0D ACPI: (supports S0 S3 S4 S5)=0D ACPI: Using IOAPIC for interrupt routing=0D ACPI: No dock devices found.=0D PCI: Ignoring host bridge windows from ACPI; if necessary, use "pci=3Duse_c= rs" and report a bug=0D ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])=0D pci_root PNP0A03:00: host bridge window [io 0x0000-0x0cf7] (ignored)=0D pci_root PNP0A03:00: host bridge window [io 0x0d00-0xffff] (ignored)=0D pci_root PNP0A03:00: host bridge window [mem 0x000a0000-0x000bffff] (ignore= d)=0D pci_root PNP0A03:00: host bridge window [mem 0xe0000000-0xfebfffff] (ignore= d)=0D pci 0000:00:01.1: reg 20: [io 0xc000-0xc00f]=0D pci 0000:00:01.3: quirk: [io 0xb000-0xb03f] claimed by PIIX4 ACPI=0D pci 0000:00:01.3: quirk: [io 0xb100-0xb10f] claimed by PIIX4 SMB=0D pci 0000:00:02.0: reg 10: [mem 0xf0000000-0xf1ffffff pref]=0D pci 0000:00:02.0: reg 14: [mem 0xf2000000-0xf2000fff]=0D pci 0000:00:02.0: reg 30: [mem 0xf2010000-0xf201ffff pref]=0D pci 0000:00:03.0: reg 10: [mem 0xf2020000-0xf203ffff]=0D pci 0000:00:03.0: reg 14: [io 0xc040-0xc07f]=0D pci 0000:00:03.0: reg 30: [mem 0xf2040000-0xf205ffff pref]=0D pci_bus 0000:00: on NUMA node 0=0D ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]=0D ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11)=0D ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)=0D ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)=0D ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11)=0D vgaarb: device added: PCI:0000:00:02.0,decodes=3Dio+mem,owns=3Dio+mem,locks= =3Dnone=0D vgaarb: loaded=0D SCSI subsystem initialized=0D libata version 3.00 loaded.=0D usbcore: registered new interface driver usbfs=0D usbcore: registered new interface driver hub=0D usbcore: registered new device driver usb=0D PCI: Using ACPI for IRQ routing=0D PCI: pci_cache_line_size set to 32 bytes=0D reserve RAM buffer: 0000000000002000 - 000000000000ffff =0D reserve RAM buffer: 000000000009f400 - 000000000009ffff =0D reserve RAM buffer: 000000003fffd000 - 000000003fffffff =0D NetLabel: Initializing=0D NetLabel: domain hash size =3D 128=0D NetLabel: protocols =3D UNLABELED CIPSOv4=0D NetLabel: unlabeled traffic allowed by default=0D HPET: 3 timers in total, 0 timers will be used for per-cpu timer=0D hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0=0D hpet0: 3 comparators, 64-bit 100.000000 MHz counter=0D Switching to clocksource kvm-clock=0D pnp: PnP ACPI init=0D ACPI: bus type pnp registered=0D pnp: PnP ACPI: found 8 devices=0D ACPI: ACPI bus type pnp unregistered=0D PnPBIOS: Disabled=0D pci_bus 0000:00: resource 0 [io 0x0000-0xffff]=0D pci_bus 0000:00: resource 1 [mem 0x00000000-0xffffffff]=0D NET: Registered protocol family 2=0D IP route cache hash table entries: 32768 (order: 5, 131072 bytes)=0D TCP established hash table entries: 131072 (order: 8, 1048576 bytes)=0D TCP bind hash table entries: 65536 (order: 7, 524288 bytes)=0D TCP: Hash tables configured (established 131072 bind 65536)=0D TCP reno registered=0D UDP hash table entries: 512 (order: 2, 16384 bytes)=0D UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)=0D NET: Registered protocol family 1=0D pci 0000:00:00.0: Limiting direct PCI/PCI transfers=0D pci 0000:00:01.0: PIIX3: Enabling Passive Release=0D pci 0000:00:01.0: Activating ISA DMA hang workarounds=0D pci 0000:00:02.0: Boot video device=0D PCI: CLS 0 bytes, default 32=0D Scanning for low memory corruption every 60 seconds=0D audit: initializing netlink socket (disabled)=0D type=3D2000 audit(1293030098.505:1): initialized=0D highmem bounce pool size: 64 pages=0D VFS: Disk quotas dquot_6.5.2=0D Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)=0D SGI XFS with ACLs, security attributes, realtime, large block/inode numbers= , no debug enabled=0D SGI XFS Quota Management subsystem=0D msgmni has been set to 1730=0D async_tx: api initialized (async)=0D Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253)=0D io scheduler noop registered=0D io scheduler deadline registered=0D io scheduler cfq registered (default)=0D pci_hotplug: PCI Hot Plug PCI Core version: 0.5=0D isapnp: Scanning for PnP cards...=0D isapnp: No Plug & Play device found=0D Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled=0D =FFserial8250: ttyS0 at I/O 0x3f8 (irq =3D 4) is a 16550A=0D 00:06: ttyS0 at I/O 0x3f8 (irq =3D 4) is a 16550A=0D FDC 0 is a S82078B=0D brd: module loaded=0D Compaq SMART2 Driver (v 2.6.0)=0D HP CISS Driver (v 3.6.26)=0D Uniform Multi-Platform E-IDE driver=0D ide-gd driver 1.18=0D ide-cd driver 5.00=0D stex: Promise SuperTrak EX Driver version: 4.6.0000.4=0D ata_piix 0000:00:01.1: version 2.13=0D ata_piix 0000:00:01.1: setting latency timer to 64=0D scsi0 : ata_piix=0D scsi1 : ata_piix=0D ata1: PATA max MWDMA2 cmd 0x1f0 ctl 0x3f6 bmdma 0xc000 irq 14=0D ata2: PATA max MWDMA2 cmd 0x170 ctl 0x376 bmdma 0xc008 irq 15=0D Fusion MPT base driver 3.04.17=0D Copyright (c) 1999-2008 LSI Corporation=0D Fusion MPT SPI Host driver 3.04.17=0D ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver=0D ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver=0D uhci_hcd: USB Universal Host Controller Interface driver=0D Initializing USB Mass Storage driver...=0D usbcore: registered new interface driver usb-storage=0D USB Mass Storage support registered.=0D usbcore: registered new interface driver ums-alauda=0D usbcore: registered new interface driver ums-cypress=0D usbcore: registered new interface driver ums-datafab=0D usbcore: registered new interface driver ums-freecom=0D usbcore: registered new interface driver ums-isd200=0D usbcore: registered new interface driver ums-jumpshot=0D usbcore: registered new interface driver ums-karma=0D usbcore: registered new interface driver ums-onetouch=0D usbcore: registered new interface driver ums-sddr09=0D usbcore: registered new interface driver ums-sddr55=0D usbcore: registered new interface driver ums-usbat=0D PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12=0D serio: i8042 KBD port at 0x60,0x64 irq 1=0D serio: i8042 AUX port at 0x60,0x64 irq 12=0D mice: PS/2 mouse device common for all mice=0D md: linear personality registered for level -1=0D md: raid0 personality registered for level 0=0D md: raid1 personality registered for level 1=0D md: raid10 personality registered for level 10=0D input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input= /input0=0D md: raid6 personality registered for level 6=0D md: raid5 personality registered for level 5=0D md: raid4 personality registered for level 4=0D EISA: Probing bus 0 at eisa.0=0D EISA: Detected 0 cards.=0D cpuidle: using governor ladder=0D cpuidle: using governor menu=0D usbcore: registered new interface driver hiddev=0D usbcore: registered new interface driver usbhid=0D usbhid: USB HID core driver=0D TCP bic registered=0D Initializing XFRM netlink socket=0D NET: Registered protocol family 17=0D Registering the dns_resolver key type=0D Using IPI No-Shortcut mode=0D registered taskstats version 1=0D drivers/rtc/hctosys.c: unable to open rtc device (rtc0)=0D ata1.01: NODEV after polling detection=0D ata2.01: NODEV after polling detection=0D ata2.00: ATAPI: QEMU DVD-ROM, 0.13.0, max UDMA/100=0D ata1.00: ATA-7: QEMU HARDDISK, 0.13.0, max UDMA/100=0D ata1.00: 16777216 sectors, multi 16: LBA48 =0D ata2.00: configured for MWDMA2=0D ata1.00: configured for MWDMA2=0D scsi 0:0:0:0: Direct-Access ATA QEMU HARDDISK 0.13 PQ: 0 ANSI: = 5=0D sd 0:0:0:0: [sda] 16777216 512-byte logical blocks: (8.58 GB/8.00 GiB)=0D sd 0:0:0:0: [sda] Write Protect is off=0D sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00=0D sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't suppo= rt DPO or FUA=0D scsi 1:0:0:0: CD-ROM QEMU QEMU DVD-ROM 0.13 PQ: 0 ANSI: = 5=0D sda: sda1=0D sr0: scsi3-mmc drive: 4x/4x xa/form2 tray=0D cdrom: Uniform CD-ROM driver Revision: 3.20=0D sd 0:0:0:0: [sda] Attached SCSI disk=0D sr 1:0:0:0: Attached scsi CD-ROM sr0=0D md: Waiting for all devices to be available before autodetect=0D md: If you don't use raid, use raid=3Dnoautodetect=0D md: Autodetecting RAID arrays.=0D md: Scanned 0 and added 0 devices.=0D md: autorun ...=0D md: ... autorun DONE.=0D EXT3-fs (sda1): error: couldn't mount because of unsupported optional featu= res (240)=0D EXT2-fs (sda1): error: couldn't mount because of unsupported optional featu= res (244)=0D EXT4-fs (sda1): INFO: recovery required on readonly filesystem=0D EXT4-fs (sda1): write access will be enabled during recovery=0D EXT4-fs (sda1): recovery complete=0D EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)=0D VFS: Mounted root (ext4 filesystem) readonly on device 8:1.=0D devtmpfs: mounted=0D Freeing unused kernel memory: 504k freed=0D systemd[1]: systemd 15 running in system mode. (+PAM -LIBWRAP -AUDIT -SELIN= UX +SYSVINIT -LIBCRYPTSETUP; frugalware)=0D Welcome to =1B[1;36mFrugalware 1.4pre2 (Nexon)=1B[0m!=0D systemd[1]: /sbin/modprobe failed with error code 1.=0D systemd[1]: Set hostname to .=0D systemd[1]: /etc/mtab is not a symlink or not pointing to /proc/self/mounts= =2E This is not supported anymore. Please make sure to replace this file by= a symlink to avoid incorrect or misleading mount(8) output.=0D Starting LSB: Clean /tmp, /var/run and /var/lock....=0D Starting Apply Kernel Variables...=0D Starting Load Kernel Modules...=0D systemd[1]: Failed to open /dev/autofs: No such file or directory=0D systemd[1]: Failed to initialize automounter: No such file or directory=0D systemd[1]: Unit sys-kernel-debug.automount entered failed state.=0D systemd[1]: Failed to open /dev/autofs: No such file or directory=0D systemd[1]: Failed to initialize automounter: No such file or directory=0D systemd[1]: Unit proc-sys-fs-binfmt_misc.automount entered failed state.=0D systemd[1]: Failed to open /dev/autofs: No such file or directory=0D systemd[1]: Failed to initialize automounter: No such file or directory=0D systemd[1]: Unit sys-kernel-security.automount entered failed state.=0D systemd[1]: Failed to open /dev/autofs: No such file or directory=0D systemd[1]: Failed to initialize automounter: No such file or directory=0D systemd[1]: Unit dev-mqueue.automount entered failed state.=0D Starting Setup Virtual Console...=0D Starting Apply System Clock UTC Offset...=0D Starting Remount API VFS...=0D Starting File System Check on Root Device...=0D systemd[1]: systemd-modules-load.service: main process exited, code=3Dexite= d, status=3D1=0D Starting Load Kernel Modules =1B[1;31mfailed=1B[0m.=0D systemd[1]: Unit systemd-modules-load.service entered failed state.=0D Starting systemd Syslog Kernel Log Buffer Bridge...=0D Starting Logging Daemon...=0D modprobe[1210]: FATAL: Could not load /lib/modules/2.6.36/modules.dep: No s= uch file or directory=0D Starting udev Kernel Device Manager...=0D systemd-fsck[1216]: /dev/sda1: Superblock last mount time is in the future.= =0D systemd-fsck[1216]: (by less than a day, probably due to the hardware clock= being incorrectly set) FIXED.=0D systemd-fsck[1216]: /dev/sda1: Superblock last write time is in the future.= =0D systemd-fsck[1216]: (by less than a day, probably due to the hardware clock= being incorrectly set). FIXED.=0D systemd-fsck[1216]: /dev/sda1: clean, 45976/524288 files, 265205/2096474 bl= ocks (check after next mount)=0D Starting Remount Root FS...=0D EXT4-fs (sda1): re-mounted. Opts: (null)=0D Starting Load Random Seed...=0D Starting Recreate Volatile Files and Directories...=0D udev[1228]: starting version 165=0D BUG: unable to handle kernel NULL pointer dereference at 00000008=0D IP: [] rb_insert_color+0x20/0x110=0D *pde =3D 00000000 =0D Oops: 0000 [#1] PREEMPT SMP =0D last sysfs file: /sys/bus/eisa/uevent=0D Modules linked in:=0D =0D Pid: 1239, comm: find Not tainted 2.6.36 #1 /Bochs=0D EIP: 0060:[] EFLAGS: 00010046 CPU: 0=0D EIP is at rb_insert_color+0x20/0x110=0D EAX: 00000000 EBX: 00000000 ECX: f68a71e8 EDX: f6874b5c=0D ESI: f68a71e8 EDI: 00000000 EBP: f6874c68 ESP: f6903ba8=0D DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068=0D Process find (pid: 1239, ti=3Df6902000 task=3Df71329e0 task.ti=3Df6902000)= =0D Stack:=0D f6874b5c f6874c60 0cc35d16 00000000 00000000 c10348fc f68a71ec ffee2cc1=0D <0> ffffffff f6874b40 f6874b5c f7132b8c c2407bc0 f7169400 f71329e0 c1548162= =0D <0> f7169400 00000046 00000046 00000000 c1041ec4 c17b2bc0 00000000 f68e6dc0= =0D Call Trace:=0D [] ? put_prev_task_fair+0xdc/0x120=0D [] ? schedule+0x102/0x8c0=0D [] ? irq_exit+0x34/0x80=0D [] ? ata_link_init+0x9b/0xb0=0D [] ? preempt_schedule+0x2d/0x50=0D [] ? scsi_dispatch_cmd+0x15a/0x300=0D [] ? scsi_request_fn+0x37f/0x480=0D [] ? cfq_insert_request+0x35c/0x570=0D [] ? __blk_run_queue+0x52/0x140=0D [] ? elv_insert+0xbf/0x210=0D [] ? __make_request+0x10a/0x520=0D [] ? bio_add_page+0x2c/0x40=0D [] ? do_mpage_readpage+0x3ae/0x700=0D [] ? generic_make_request+0x217/0x530=0D [] ? mem_cgroup_charge_common+0x46/0x60=0D [] ? submit_bio+0x56/0xb0=0D [] ? mpage_readpages+0xba/0x100=0D [] ? mpage_bio_submit+0x18/0x20=0D [] ? mpage_readpages+0xe4/0x100=0D [] ? ext4_readpages+0x0/0x20=0D [] ? __do_page_cache_readahead+0x179/0x260=0D [] ? ext4_get_block+0x0/0x20=0D [] ? ra_submit+0x16/0x20=0D [] ? page_cache_async_readahead+0x65/0xa0=0D [] ? filemap_fault+0x262/0x3e0=0D [] ? __do_fault+0x42/0x5c0=0D [] ? handle_mm_fault+0x1b7/0xc10=0D [] ? remove_vma+0x37/0x50=0D [] ? do_page_fault+0x14e/0x3c0=0D [] ? filp_close+0x3b/0x70=0D [] ? sys_close+0x5f/0xb0=0D [] ? do_page_fault+0x0/0x3c0=0D [] ? error_code+0x5a/0x60=0D [] ? do_page_fault+0x0/0x3c0=0D Code: 83 e2 03 09 ca 89 10 5b 5e 5f c3 55 57 56 53 83 ec 04 89 c5 89 14 24 = 8b 30 66 90 83 e6 fc 74 3b 8b 06 a8 01 75 35 89 c3 83 e3 fc <8b> 7b 08 39 f= 7 74 59 85 ff 74 35 8b 17 f6 c2 01 75 2e 83 ca 01 =0D EIP: [] rb_insert_color+0x20/0x110 SS:ESP 0068:f6903ba8=0D CR2: 0000000000000008=0D ---[ end trace a7ee9d6edc552fbb ]---=0D note: find[1239] exited with preempt_count 268435458=0D --OwXh6gFRjCd3qPCM-- --p6hDAtPN9q+ZnUca Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEARECAAYFAk0SFdoACgkQe81tAgORUJZsIwCgitXwJYTCQOxui+YsX/ySdSQA FIsAn3HBKK8rVAVPopGI9HveqDcsibPC =J+q1 -----END PGP SIGNATURE----- --p6hDAtPN9q+ZnUca-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/