Hi On linux-2.6.20.1, we're seeing hard lockups with 2 raid systems connected to a qla2xxx card and used as a single volume via lvm. The system seems to lock up only if data gets written to both raid systems at the same time. On a standard kernel nothing makes it to the log, the system just freezes. So we tried a lockdep kernel which reports two BUGs during boot, see below. Could this be related to our problem? Thanks Andre [ 64.150773] Loading iSCSI transport class v2.0-724. [ 64.151096] QLogic Fibre Channel HBA Driver [ 64.151405] ACPI: PCI Interrupt 0000:05:08.0[A] -> GSI 32 (level, low) -> IRQ 32 [ 64.151821] qla2xxx 0000:05:08.0: Found an ISP2422, irq 32, iobase 0xffffc20000006000 [ 64.152231] qla2xxx 0000:05:08.0: Configuring PCI space... [ 64.152498] qla2xxx 0000:05:08.0: Configure NVRAM parameters... [ 64.159088] qla2xxx 0000:05:08.0: Verifying loaded RISC code... [ 74.169623] qla2xxx 0000:05:08.0: Firmware image unavailable. [ 74.169737] qla2xxx 0000:05:08.0: Firmware images can be retrieved from: ftp://ftp.qlogic.com/outgoing/linux/firmware/. [ 74.169902] qla2xxx 0000:05:08.0: Attempting to load (potentially outdated) firmware from flash. [ 74.760935] qla2xxx 0000:05:08.0: Allocated (64 KB) for EFT... [ 74.761186] qla2xxx 0000:05:08.0: Allocated (1413 KB) for firmware dump... [ 74.776988] scsi0 : qla2xxx [ 74.961451] qla2xxx 0000:05:08.0: [ 74.961452] QLogic Fibre Channel HBA Driver: 8.01.07-k4 [ 74.961453] QLogic HP AE369-60001 - QLA2340 [ 74.961454] ISP2422: PCI-X Mode 1 (133 MHz) @ 0000:05:08.0 hdma+, host#=0, fw=4.00.70 [IP] [ 74.961970] ACPI: PCI Interrupt 0000:05:08.1[B] -> GSI 33 (level, low) -> IRQ 33 [ 74.962296] qla2xxx 0000:05:08.1: Found an ISP2422, irq 33, iobase 0xffffc20000172000 [ 74.962662] qla2xxx 0000:05:08.1: Configuring PCI space... [ 74.962914] qla2xxx 0000:05:08.1: Configure NVRAM parameters... [ 74.969494] qla2xxx 0000:05:08.1: Verifying loaded RISC code... [ 75.353426] qla2xxx 0000:05:08.0: LIP reset occured (f7f7). [ 75.385670] qla2xxx 0000:05:08.0: LIP occured (f7f7). [ 75.388282] qla2xxx 0000:05:08.0: LOOP UP detected (2 Gbps). [ 75.778656] BUG: at kernel/lockdep.c:1860 trace_hardirqs_on() [ 75.778771] [ 75.778772] Call Trace: [ 75.778967] <IRQ> [<ffffffff8024b877>] trace_hardirqs_on+0xd7/0x180 [ 75.779154] [<ffffffff8052bc1b>] _spin_unlock_irq+0x2b/0x40 [ 75.779271] [<ffffffff804605d7>] qla2x00_process_completed_request+0x137/0x1d0 [ 75.779424] [<ffffffff804606f2>] qla2x00_status_entry+0x82/0xa40 [ 75.779541] [<ffffffff8024b17f>] __lock_acquire+0xcdf/0xd90 [ 75.779657] [<ffffffff8052bcb2>] _spin_unlock_irqrestore+0x42/0x60 [ 75.779775] [<ffffffff8046228e>] qla24xx_intr_handler+0x4e/0x2b0 [ 75.779892] [<ffffffff804613e1>] qla24xx_process_response_queue+0xc1/0x1c0 [ 75.780012] [<ffffffff80462414>] qla24xx_intr_handler+0x1d4/0x2b0 [ 75.780131] [<ffffffff8025e950>] handle_IRQ_event+0x20/0x60 [ 75.780270] [<ffffffff802604ad>] handle_fasteoi_irq+0xbd/0x110 [ 75.780411] [<ffffffff8020cf62>] do_IRQ+0x132/0x1a0 [ 75.780545] [<ffffffff80208430>] default_idle+0x0/0x60 [ 75.780682] [<ffffffff8020a236>] ret_from_intr+0x0/0xf [ 75.780818] <EOI> [<ffffffff80208467>] default_idle+0x37/0x60 [ 75.781021] [<ffffffff80208469>] default_idle+0x39/0x60 [ 75.781156] [<ffffffff80208467>] default_idle+0x37/0x60 [ 75.781294] [<ffffffff802084f1>] cpu_idle+0x61/0x90 [ 75.781429] [<ffffffff806d6f8b>] start_secondary+0x51b/0x530 [ 75.781569] [ 75.781873] scsi 0:0:0:0: Direct-Access transtec T6100F16R1-E 342I PQ: 0 ANSI: 5 [ 75.782532] BUG: workqueue leaked lock or atomic: scsi_wq_0/0x00000000/362 [ 75.782678] last function: fc_scsi_scan_rport+0x0/0x90 [ 75.782878] 1 lock held by scsi_wq_0/362: [ 75.783008] #0: (&shost->scan_mutex){--..}, at: [<ffffffff80529fe5>] mutex_lock+0x25/0x30 [ 75.783517] [ 75.783518] Call Trace: [ 75.783754] [<ffffffff80248319>] debug_show_held_locks+0x9/0x10 [ 75.783896] [<ffffffff8023eb49>] run_workqueue+0x149/0x1a0 [ 75.784036] [<ffffffff802427c0>] keventd_create_kthread+0x0/0x90 [ 75.784180] [<ffffffff8023edc1>] worker_thread+0x151/0x190 [ 75.784322] [<ffffffff80227e80>] default_wake_function+0x0/0x10 [ 75.784463] [<ffffffff8023ec70>] worker_thread+0x0/0x190 [ 75.784600] [<ffffffff80242a2a>] kthread+0xda/0x110 [ 75.784737] [<ffffffff8020ab08>] child_rip+0xa/0x12 [ 75.784875] [<ffffffff8052bc1b>] _spin_unlock_irq+0x2b/0x40 [ 75.785014] [<ffffffff8020a28c>] restore_args+0x0/0x30 [ 75.785149] [<ffffffff80242950>] kthread+0x0/0x110 [ 75.785285] [<ffffffff8020aafe>] child_rip+0x0/0x12 [ 75.785417] [ 84.980341] qla2xxx 0000:05:08.1: Firmware image unavailable. [ 84.980455] qla2xxx 0000:05:08.1: Firmware images can be retrieved from: ftp://ftp.qlogic.com/outgoing/linux/firmware/. [ 84.980620] qla2xxx 0000:05:08.1: Attempting to load (potentially outdated) firmware from flash. [ 85.571726] qla2xxx 0000:05:08.1: Allocated (64 KB) for EFT... [ 85.571956] qla2xxx 0000:05:08.1: Allocated (1413 KB) for firmware dump... [ 85.587766] scsi1 : qla2xxx [ 85.718476] qla2xxx 0000:05:08.1: [ 85.718478] QLogic Fibre Channel HBA Driver: 8.01.07-k4 [ 85.718479] QLogic HP AE369-60001 - QLA2340 [ 85.718480] ISP2422: PCI-X Mode 1 (133 MHz) @ 0000:05:08.1 hdma+, host#=1, fw=4.00.70 [IP] [ 85.719505] sda : very big device. try to use READ CAPACITY(16). [ 85.719727] SCSI device sda: 11714863104 512-byte hdwr sectors (5998010 MB) [ 85.720114] sda: Write Protect is off [ 85.720219] sda: Mode Sense: 9b 00 00 08 [ 85.720608] SCSI device sda: write cache: disabled, read cache: enabled, doesn't support DPO or FUA [ 85.721008] sda : very big device. try to use READ CAPACITY(16). [ 85.721206] SCSI device sda: 11714863104 512-byte hdwr sectors (5998010 MB) [ 85.721552] sda: Write Protect is off [ 85.721680] sda: Mode Sense: 9b 00 00 08 [ 85.722088] SCSI device sda: write cache: disabled, read cache: enabled, doesn't support DPO or FUA [ 85.722298] sda: unknown partition table [ 85.722897] sd 0:0:0:0: Attached scsi disk sda [ 85.723205] sd 0:0:0:0: Attached scsi generic sg0 type 0
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