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During I/O and simultaneous cat of /sys/kernel/debug/lpfc/fnX/rx_monitor, a hard lockup similar to the call trace below may occur. The spin_lock_bh in lpfc_rx_monitor_report is not protecting from timer interrupts as expected, so change the strength of the spin lock to _irq. Kernel panic - not syncing: Hard LOCKUP CPU: 3 PID: 110402 Comm: cat Kdump: loaded exception RIP: native_queued_spin_lock_slowpath+91 [IRQ stack] native_queued_spin_lock_slowpath at ffffffffb814e30b _raw_spin_lock at ffffffffb89a667a lpfc_rx_monitor_record at ffffffffc0a73a36 [lpfc] lpfc_cmf_timer at ffffffffc0abbc67 [lpfc] __hrtimer_run_queues at ffffffffb8184250 hrtimer_interrupt at ffffffffb8184ab0 smp_apic_timer_interrupt at ffffffffb8a026ba apic_timer_interrupt at ffffffffb8a01c4f [End of IRQ stack] apic_timer_interrupt at ffffffffb8a01c4f lpfc_rx_monitor_report at ffffffffc0a73c80 [lpfc] lpfc_rx_monitor_read at ffffffffc0addde1 [lpfc] full_proxy_read at ffffffffb83e7fc3 vfs_read at ffffffffb833fe71 ksys_read at ffffffffb83402af do_syscall_64 at ffffffffb800430b entry_SYSCALL_64_after_hwframe at ffffffffb8a000ad Signed-off-by: Justin Tee <justin.tee@broadcom.com> Link: https://lore.kernel.org/r/20221017164323.14536-2-justintee8345@gmail.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> |
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| .. | ||
| lpfc_attr.c | ||
| lpfc_attr.h | ||
| lpfc_bsg.c | ||
| lpfc_bsg.h | ||
| lpfc_compat.h | ||
| lpfc_crtn.h | ||
| lpfc_ct.c | ||
| lpfc_debugfs.c | ||
| lpfc_debugfs.h | ||
| lpfc_disc.h | ||
| lpfc_els.c | ||
| lpfc_hbadisc.c | ||
| lpfc_hw.h | ||
| lpfc_hw4.h | ||
| lpfc_ids.h | ||
| lpfc_init.c | ||
| lpfc_logmsg.h | ||
| lpfc_mbox.c | ||
| lpfc_mem.c | ||
| lpfc_nl.h | ||
| lpfc_nportdisc.c | ||
| lpfc_nvme.c | ||
| lpfc_nvme.h | ||
| lpfc_nvmet.c | ||
| lpfc_scsi.c | ||
| lpfc_scsi.h | ||
| lpfc_sli.c | ||
| lpfc_sli.h | ||
| lpfc_sli4.h | ||
| lpfc_version.h | ||
| lpfc_vmid.c | ||
| lpfc_vport.c | ||
| lpfc_vport.h | ||
| lpfc.h | ||
| Makefile | ||