diff --git a/qla2x00t-32gbit/qla2x00-target/README b/qla2x00t-32gbit/qla2x00-target/README index c410467f2..d057e08db 100644 --- a/qla2x00t-32gbit/qla2x00-target/README +++ b/qla2x00t-32gbit/qla2x00-target/README @@ -19,86 +19,4 @@ the previous version of the SCST QLogic target driver are: { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2281) }, { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2089) }, { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2289) }, -- Works in combination with Linux kernel v2.6.32 and later. - -Known Bugs ----------- - -When using the RHEL 6 debug kernel, a recursive locking complaint is reported -when loading this driver with qlini_mode=dual: - -============================================= -[ INFO: possible recursive locking detected ] -2.6.32-754.11.1.el6.x86_64.debug #1 ---------------------------------------------- -qla2xxx_wq/0/3557 is trying to acquire lock: - ((fmt)){+.+.+.}, at: [] flush_work+0x3d/0x120 - -but task is already holding lock: - ((fmt)){+.+.+.}, at: [] worker_thread+0x1cb/0x3f0 - -other info that might help us debug this: -2 locks held by qla2xxx_wq/0/3557: - #0: ((fmt)){+.+.+.}, at: [] worker_thread+0x1cb/0x3f0 - #1: (&base_vha->iocb_work){+.+.+.}, at: [] worker_thread+0x1cb/0x3f0 - -stack backtrace: -Pid: 3557, comm: qla2xxx_wq/0 Not tainted 2.6.32-754.11.1.el6.x86_64.debug #1 -Call Trace: - [] ? __lock_acquire+0x11b0/0x1560 - [] ? sched_clock+0x9/0x10 - [] ? sched_clock+0x9/0x10 - [] ? lock_acquire+0xa4/0x130 - [] ? flush_work+0x3d/0x120 - [] ? __wake_up+0x53/0x70 - [] ? flush_work+0x69/0x120 - [] ? flush_work+0x3d/0x120 - [] ? sched_clock_cpu+0xb8/0x110 - [] ? mark_held_locks+0x73/0xa0 - [] ? _spin_unlock_irqrestore+0x40/0x80 - [] ? trace_hardirqs_on_caller+0x14d/0x190 - [] ? trace_hardirqs_on+0xd/0x10 - [] ? qla24xx_do_nack_work+0x68/0x120 [qla2xxx_scst] - [] ? qla2x00_do_work+0x53b/0xba0 [qla2xxx_scst] - [] ? sched_clock+0x9/0x10 - [] ? sched_clock_local+0x25/0x90 - [] ? qla2x00_iocb_work_fn+0x54/0xa0 [qla2xxx_scst] - [] ? qla2x00_iocb_work_fn+0x0/0xa0 [qla2xxx_scst] - [] ? worker_thread+0x21e/0x3f0 - [] ? worker_thread+0x1cb/0x3f0 - [] ? autoremove_wake_function+0x0/0x40 - [] ? worker_thread+0x0/0x3f0 - [] ? kthread+0xa0/0xc0 - [] ? child_rip+0x20/0x30 - [] ? retint_restore_args+0x13/0x43 - [] ? kthread+0x0/0xc0 - [] ? child_rip+0x0/0x30 - -When using RHEL 6 unloading this driver triggers a deadlock: - -INFO: task events/0:35 blocked for more than 120 seconds. - Not tainted 2.6.32-754.11.1.el6.x86_64.debug #1 -"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. -events/0 D ffff880077e24408 12408 35 2 0x00000000 - ffff88007e02fa60 0000000000000046 0000000000000000 7fffffffffffffff - 7fffffffffffffff 00000365a5588f80 ffff88007e028a80 ffff88000d7d93d8 - 0000000100346a5e 00000000000003c8 ffff88007e029040 ffff88007e02ffd8 -Call Trace: - [] schedule_timeout+0x265/0x330 - [] ? wait_for_common+0x4f/0x180 - [] ? wait_for_common+0x4f/0x180 - [] ? default_wake_function+0x0/0x20 - [] wait_for_common+0x12b/0x180 - [] ? default_wake_function+0x0/0x20 - [] wait_for_completion+0x1d/0x20 - [] ? qlt_free_session_done+0x1d6/0x930 [qla2xxx_scst] - [] ? qlt_free_session_done+0x0/0x930 [qla2xxx_scst] - [] ? worker_thread+0x21e/0x3f0 - [] ? worker_thread+0x1cb/0x3f0 - [] ? autoremove_wake_function+0x0/0x40 - [] ? worker_thread+0x0/0x3f0 - [] ? kthread+0xa0/0xc0 - [] ? child_rip+0x20/0x30 - [] ? retint_restore_args+0x13/0x43 - [] ? kthread+0x0/0xc0 - [] ? child_rip+0x0/0x30 +- Works in combination with Linux kernel v3.15 and later.