Hi, I discovered a bug when loading mpt2sas module with the current btrfs tree (which is 3.2.0 plus current btrfs) and verified with linux 3.3.0-rc4. It hides away when I set CONFIG_DEBUG_PREEMPT=n. Feb 20 13:53:04 zarzz kernel: [ 3.834047] Freeing unused kernel memory: 868k freed Feb 20 13:53:04 zarzz kernel: [ 3.835019] Freeing unused kernel memory: 192k freed Feb 20 13:53:04 zarzz kernel: [ 3.917143] modprobe used greatest stack depth: 4488 bytes left Feb 20 13:53:04 zarzz kernel: [ 3.942538] mpt2sas version 12.100.00.00 loaded Feb 20 13:53:04 zarzz kernel: [ 3.942994] scsi6 : Fusion MPT SAS Host Feb 20 13:53:04 zarzz kernel: [ 3.946028] mpt2sas0: 64 BIT PCI BUS DMA ADDRESSING SUPPORTED, total mem (16399548 kB) Feb 20 13:53:04 zarzz kernel: [ 3.946179] mpt2sas 0000:01:00.0: irq 57 for MSI/MSI-X Feb 20 13:53:04 zarzz kernel: [ 3.946238] mpt2sas0-msix0: PCI-MSI-X enabled: IRQ 57 Feb 20 13:53:04 zarzz kernel: [ 3.946241] mpt2sas0: iomem(0x00000000fb43c000), mapped(0xffffc90001860000), size(16384) Feb 20 13:53:04 zarzz kernel: [ 3.946245] mpt2sas0: ioport(0x000000000000c000), size(256) Feb 20 13:53:04 zarzz kernel: [ 3.962802] ata_id used greatest stack depth: 3904 bytes left Feb 20 13:53:04 zarzz kernel: [ 4.018627] mpt2sas0: sending message unit reset !! Feb 20 13:53:04 zarzz kernel: [ 4.020616] mpt2sas0: message unit reset: SUCCESS Feb 20 13:53:04 zarzz kernel: [ 4.087887] mpt2sas0: Allocated physical memory: size(8027 kB) Feb 20 13:53:04 zarzz kernel: [ 4.087890] mpt2sas0: Current Controller Queue Depth(3577), Max Controller Queue Depth(3712) Feb 20 13:53:04 zarzz kernel: [ 4.087892] mpt2sas0: Scatter Gather Elements per IO(128) Feb 20 13:53:04 zarzz kernel: [ 4.146377] BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/1330 Feb 20 13:53:04 zarzz kernel: [ 4.242064] caller is mpt2sas_base_put_smid_default+0x2f/0x80 [mpt2sas] Feb 20 13:53:04 zarzz kernel: [ 4.242067] Pid: 1330, comm: modprobe Not tainted 3.3.0-rc4 #43 Feb 20 13:53:04 zarzz kernel: [ 4.242069] Call Trace: Feb 20 13:53:04 zarzz kernel: [ 4.242076] [<ffffffff81436972>] debug_smp_processor_id+0xd2/0xf0 Feb 20 13:53:04 zarzz kernel: [ 4.242084] [<ffffffffa00152af>] mpt2sas_base_put_smid_default+0x2f/0x80 [mpt2sas] Feb 20 13:53:04 zarzz kernel: [ 4.242094] [<ffffffffa0015436>] _base_event_notification+0x136/0x280 [mpt2sas] Feb 20 13:53:04 zarzz kernel: [ 4.242104] [<ffffffffa0015a79>] _base_make_ioc_operational+0x469/0x10e0 [mpt2sas] Feb 20 13:53:04 zarzz kernel: [ 4.242111] [<ffffffff810e6b0b>] ? is_module_address+0x2b/0x60 Feb 20 13:53:04 zarzz kernel: [ 4.242118] [<ffffffff810d73c4>] ? static_obj+0x44/0x60 Feb 20 13:53:04 zarzz kernel: [ 4.242123] [<ffffffff810d89cb>] ? lockdep_init_map+0x5b/0x150 Feb 20 13:53:04 zarzz kernel: [ 4.242129] [<ffffffff810d5f96>] ? debug_mutex_init+0x36/0x50 Feb 20 13:53:04 zarzz kernel: [ 4.242138] [<ffffffffa001ac29>] mpt2sas_base_attach+0x10b9/0x15a0 [mpt2sas] Feb 20 13:53:04 zarzz kernel: [ 4.242147] [<ffffffffa00201d6>] _scsih_probe+0x3d6/0x610 [mpt2sas] Feb 20 13:53:04 zarzz kernel: [ 4.242151] [<ffffffff810b0eb1>] ? get_parent_ip+0x11/0x50 Feb 20 13:53:04 zarzz kernel: [ 4.242155] [<ffffffff819198a5>] ? sub_preempt_count+0x95/0xd0 Feb 20 13:53:04 zarzz kernel: [ 4.242158] [<ffffffff81916000>] ? _raw_spin_unlock+0x30/0x60 Feb 20 13:53:04 zarzz kernel: [ 4.242164] [<ffffffff8144cb32>] local_pci_probe+0x12/0x20 Feb 20 13:53:04 zarzz kernel: [ 4.242167] [<ffffffff8144dbf9>] pci_device_probe+0xf9/0x120 Feb 20 13:53:04 zarzz kernel: [ 4.242171] [<ffffffff8155a78a>] ? driver_sysfs_add+0x7a/0xb0 Feb 20 13:53:04 zarzz kernel: [ 4.242174] [<ffffffff8155a91b>] driver_probe_device+0x8b/0x2e0 Feb 20 13:53:04 zarzz kernel: [ 4.242177] [<ffffffff8155ac03>] __driver_attach+0x93/0xa0 Feb 20 13:53:04 zarzz kernel: [ 4.242180] [<ffffffff8155ab70>] ? driver_probe_device+0x2e0/0x2e0 Feb 20 13:53:04 zarzz kernel: [ 4.242184] [<ffffffff81558e38>] bus_for_each_dev+0x68/0x90 Feb 20 13:53:04 zarzz kernel: [ 4.242187] [<ffffffff8155a6b9>] driver_attach+0x19/0x20 Feb 20 13:53:04 zarzz kernel: [ 4.242190] [<ffffffff8155a378>] bus_add_driver+0x208/0x2b0 Feb 20 13:53:04 zarzz kernel: [ 4.242195] [<ffffffffa0041000>] ? 0xffffffffa0040fff Feb 20 13:53:04 zarzz kernel: [ 4.242199] [<ffffffff8155b248>] driver_register+0x78/0x140 Feb 20 13:53:04 zarzz kernel: [ 4.242204] [<ffffffff814366e6>] ? __raw_spin_lock_init+0x36/0x60 Feb 20 13:53:04 zarzz kernel: [ 4.242208] [<ffffffffa0041000>] ? 0xffffffffa0040fff Feb 20 13:53:04 zarzz kernel: [ 4.242213] [<ffffffff8144deb1>] __pci_register_driver+0x61/0xe0 Feb 20 13:53:04 zarzz kernel: [ 4.242217] [<ffffffffa0041000>] ? 0xffffffffa0040fff Feb 20 13:53:04 zarzz kernel: [ 4.242226] [<ffffffffa004116a>] _scsih_init+0x16a/0x18e [mpt2sas] Feb 20 13:53:04 zarzz kernel: [ 4.242233] [<ffffffff810001cd>] do_one_initcall+0x3d/0x170 Feb 20 13:53:04 zarzz kernel: [ 4.242238] [<ffffffff810ea67a>] sys_init_module+0x8a/0x1e0 Feb 20 13:53:04 zarzz kernel: [ 4.242242] [<ffffffff8191d122>] system_call_fastpath+0x16/0x1b -Jan -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
