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Date: Sat, 12 Apr 2008 03:43:45 +0400 From: Alexey Dobriyan <adobriyan@...il.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: linux-kernel@...r.kernel.org Subject: 2.6.25-rc8-mm2: panic involving mount_block_root and down the road Pekka fixed SLUB for me, and now core2 box survives up and including to not finding / : Setup is SATA disk with plain old partitions, nothing lvmancy: /dev/sda2 on / type ext3 (rw,noatime) CONFIG_ATA=y CONFIG_ATA_ACPI=y CONFIG_SATA_AHCI=y CONFIG_ATA_PIIX=y CONFIG_PATA_JMICRON=y sda1 is for swap. [ 3.920000] NET: Registered protocol family 1 [ 3.920000] VFS: Cannot open root device "sda2" or unknown-block(0,0) [ 3.920000] Please append a correct "root=" boot option; here are the available partitions: [ 3.920000] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) [ 3.920000] Pid: 1, comm: swapper Not tainted 2.6.25-rc8-mm2 #19 [ 3.920000] [ 3.920000] Call Trace: [ 3.920000] [<ffffffff8022ff80>] panic+0xa0/0x180 [ 3.920000] [<ffffffff8044d8c9>] ? mutex_unlock+0x9/0x10 [ 3.920000] [<ffffffff805d8e03>] ? printk_all_partitions+0x23/0x180 [ 3.920000] [<ffffffff8044d8c9>] ? mutex_unlock+0x9/0x10 [ 3.920000] [<ffffffff805d8efc>] ? printk_all_partitions+0x11c/0x180 [ 3.920000] [<ffffffff8044ee46>] ? _read_unlock+0x26/0x30 [ 3.920000] [<ffffffff805c8e82>] mount_block_root+0x102/0x2a0 [ 3.920000] [<ffffffff805c9076>] mount_root+0x56/0x60 [ 3.920000] [<ffffffff805c90cc>] prepare_namespace+0x4c/0x160 [ 3.920000] [<ffffffff805c8bce>] kernel_init+0x23e/0x2f0 [ 3.920000] [<ffffffff80228b17>] ? finish_task_switch+0x67/0xe0 [ 3.920000] [<ffffffff8020c358>] child_rip+0xa/0x12 [ 3.920000] [<ffffffff803184d2>] ? acpi_os_acquire_lock+0x9/0xb [ 3.920000] [<ffffffff805c8990>] ? kernel_init+0x0/0x2f0 [ 3.920000] [<ffffffff8020c34e>] ? child_rip+0x0/0x12 The very same sequence with lockdep on (I originally thought it's the culprit): [ 12.770000] eth1: link up, 100Mbps, full-duplex, lpa 0x45E1 [ 17.820000] atl1 0000:03:00.0: eth0 link is up 1000 Mbps full duplex [ 3.500000] ahci 0000:02:00.0: AHCI 0001.0000 32 slots 2 ports 3 Gbps 0x3 impl SATA mode [ 3.500000] ahci 0000:02:00.0: flags: 64bit ncq pm led clo pmp pio slum part [ 3.500000] PCI: Setting latency timer of device 0000:02:00.0 to 64 [ 3.500000] scsi0 : ahci [ 3.500000] scsi1 : ahci [ 3.500000] ata1: SATA max UDMA/133 abar m8192@...e8fe000 port 0xfe8fe100 irq 16 [ 3.500000] ata2: SATA max UDMA/133 abar m8192@...e8fe000 port 0xfe8fe180 irq 16 [ 3.500000] INFO: trying to register non-static key. [ 3.500000] the code is fine but needs lockdep annotation. [ 3.500000] turning off the locking correctness validator. [ 3.500000] Pid: 358, comm: scsi_eh_0 Not tainted 2.6.25-rc8-mm2 #17 [ 3.500000] [ 3.500000] Call Trace: [ 3.500000] [<ffffffff80250631>] ? static_obj+0xd1/0xe0 [ 3.500000] [<ffffffff80252bba>] register_lock_class+0x44a/0x4f0 [ 3.500000] [<ffffffff80252cd0>] __lock_acquire+0x70/0xc50 [ 3.500000] [<ffffffff80253907>] lock_acquire+0x57/0x80 [ 3.500000] [<ffffffff80241ea5>] ? __cancel_work_timer+0x55/0x230 [ 3.500000] [<ffffffff80241ed5>] __cancel_work_timer+0x85/0x230 [ 3.500000] [<ffffffff8025262d>] ? trace_hardirqs_on+0xd/0x10 [ 3.500000] [<ffffffff80252599>] ? trace_hardirqs_on_caller+0xc9/0x150 [ 3.500000] [<ffffffff8025262d>] ? trace_hardirqs_on+0xd/0x10 [ 3.500000] [<ffffffff8045425b>] ? _spin_unlock_irq+0x2b/0x40 [ 3.500000] [<ffffffff80228e60>] ? finish_task_switch+0x0/0xe0 [ 3.500000] [<ffffffff80228ec7>] ? finish_task_switch+0x67/0xe0 [ 3.500000] [<ffffffff8024208d>] cancel_delayed_work_sync+0xd/0x10 [ 3.500000] [<ffffffff8037d0a8>] ata_port_flush_task+0x18/0x50 [ 3.500000] [<ffffffff80389ac4>] ata_scsi_error+0x24/0x680 [ 3.500000] [<ffffffff80371b70>] ? scsi_error_handler+0x0/0x330 [ 3.500000] [<ffffffff80371c4c>] scsi_error_handler+0xdc/0x330 [ 3.500000] [<ffffffff80451d4a>] ? thread_return+0x4e/0x4e4 [ 3.500000] [<ffffffff80252599>] ? trace_hardirqs_on_caller+0xc9/0x150 [ 3.500000] [<ffffffff80371b70>] ? scsi_error_handler+0x0/0x330 [ 3.500000] [<ffffffff802456fd>] kthread+0x4d/0x80 [ 3.500000] [<ffffffff8020c408>] child_rip+0xa/0x12 [ 3.500000] [<ffffffff8020bb1f>] ? restore_args+0x0/0x30 [ 3.500000] [<ffffffff802456b0>] ? kthread+0x0/0x80 [ 3.500000] [<ffffffff8020c3fe>] ? child_rip+0x0/0x12 [ 3.500000] [ 3.600000] ata1: SATA link down (SStatus 0 SControl 300) [ 3.690000] ata2: SATA link down (SStatus 0 SControl 300) [ 3.690000] PNP: PS/2 Controller [PNP0303:PS2K] at 0x60,0x64 irq 1 [ 3.690000] PNP: PS/2 appears to have AUX port disabled, if this is incorrect please boot with i8042.nopnp [ 3.690000] serio: i8042 KBD port at 0x60,0x64 irq 1 [ 3.690000] mice: PS/2 mouse device common for all mice [ 3.690000] Advanced Linux Sound Architecture Driver Version 1.0.16. [ 3.700000] ACPI: PCI Interrupt 0000:00:1b.0[A] -> GSI 22 (level, low) -> IRQ 22 [ 3.700000] PCI: Setting latency timer of device 0000:00:1b.0 to 64 [ 3.720000] input: AT Translated Set 2 keyboard as /class/input/input0 [ 4.000000] ALSA device list: [ 4.000000] #0: HDA Intel at 0xfebf8000 irq 22 [ 4.000000] TCP cubic registered [ 4.000000] NET: Registered protocol family 1 [ 4.000000] VFS: Cannot open root device "sda2" or unknown-block(0,0) [ 4.000000] Please append a correct "root=" boot option; here are the available partitions: [ 4.000000] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) [ 4.000000] Pid: 1, comm: swapper Not tainted 2.6.25-rc8-mm2 #17 [ 4.000000] [ 4.000000] Call Trace: [ 4.000000] [<ffffffff80230720>] panic+0xa0/0x180 [ 4.000000] [<ffffffff80452b79>] ? mutex_unlock+0x9/0x10 [ 4.000000] [<ffffffff80452b79>] ? mutex_unlock+0x9/0x10 [ 4.000000] [<ffffffff805df01c>] ? printk_all_partitions+0x11c/0x180 [ 4.000000] [<ffffffff804541e6>] ? _read_unlock+0x26/0x30 [ 4.000000] [<ffffffff805ceea2>] mount_block_root+0x102/0x2a0 [ 4.000000] [<ffffffff805cf096>] mount_root+0x56/0x60 [ 4.000000] [<ffffffff805cf0ec>] prepare_namespace+0x4c/0x160 [ 4.000000] [<ffffffff805cebeb>] kernel_init+0x23b/0x2f0 [ 4.000000] [<ffffffff80453f37>] ? trace_hardirqs_on_thunk+0x3a/0x3f [ 4.000000] [<ffffffff80252599>] ? trace_hardirqs_on_caller+0xc9/0x150 [ 4.000000] [<ffffffff8020c408>] child_rip+0xa/0x12 [ 4.000000] [<ffffffff8020bb1f>] ? restore_args+0x0/0x30 [ 4.000000] [<ffffffff805ce9b0>] ? kernel_init+0x0/0x2f0 [ 4.000000] [<ffffffff8020c3fe>] ? child_rip+0x0/0x12 -- 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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