Panic due to recursive mutex in eoib module function eib_fip_send_update
(Doc ID 1963420.1)
Last updated on OCTOBER 09, 2019
Applies to:
Solaris Operating System - Version 11.1 to 11.1 [Release 11.0]Information in this document applies to any platform.
Symptoms
Solaris x86 machine running solaris 11 update 1 panics in eoib module due to recursive mutex.
CAT(vmcore.8/11X)> panic
panic on CPU 20
panic string: recursive mutex_enter, lp=ffffc1c0f11a3ec0 owner=fffffffc823ecc20 thread=fffffffc823ecc20
==== panic kernel thread: 0xfffffffc823ecc20 PID: 0 on CPU: 20 ====
cmd: sched(eoib:eib_manage_keepalives)
just got mutex: 0xffffc1c0f11a3ec0
t_procp: 0xfffffffffc037440 (proc_sched)
p_as: 0xfffffffffc0394f0 (kas)
p_zone: 0xfffffffffc105ce0 (global)
t_stk: 0xfffffffc823ecc20 sp: 0xfffffffc823ec8f0 t_stkbase: 0xfffffffc823e8000
t_pri: 60 (SYS) pctcpu: 0.001305
t_transience: 10 (TRANSIENT) t_wkld_flags: 0
t_cpupart: 0xfffffffffc08f4b0(0) last CPU: 20
idle: 2986931923 hrticks (2.986931923s)
start: Wed Jan 8 17:36:46 2014
age: 27216677 seconds (315 days 11 minutes 17 seconds)
t_state: TS_ONPROC
t_flag: 0x10808 (T_TALLOCSTK|T_PANIC|T_PUSHPAGE)
t_proc_flag: 0 (none set)
t_schedflag: 3 (TS_LOAD|TS_DONT_SWAP)
p_flag: 1 (SSYS)
pc: unix:vpanic_common+0x13a: addq $0xf0,%rsp
unix:vpanic_common+0x13a()
unix:0xfffffffffb88d894()
unix:0xfffffffffb88958c()
void unix:mutex_vector_enter+0x197((mutex_impl_t *)0xffffc1c0f11a3ec0)
unix:mutex_enter - frame recycled
int eoib:eib_fip_send_update+0xd6((eib_t *)0xffffc1c0326ea700, (eib_vnic_t *)0xffffc1c0f11a3e40, (eib_chan_t *)0xffffc1c0d5363960, (eib_wqe_t *)
0xffffc1c03d001658, (uint_t)8, (int *)0xfffffffc823ecba4)
int eoib:eib_fip_send_ka+0x30((eib_t *)0xffffc1c0326ea700, (eib_vnic_t *)0xffffc1c0f11a3e40, (eib_wqe_t *)0xffffc1c03d001658, (int *)0xfffffffc823ecba4)
int eoib:eib_fip_heartbeat+0x7c((eib_t *)0xffffc1c0326ea700, (eib_vnic_t *)0xffffc1c0f11a3e40, (int *)0xfffffffc823ecba4)
void eoib:eib_manage_keepalives+0x1af((eib_t *)0xffffc1c0326ea700)
unix:thread_start+8()
-- end of kernel thread's stack --
CAT(vmcore.8/11X)> mutex -l 0xffffc1c0f11a3ec0
adaptive mutex: owner: 0xfffffffc823ecc20 waiters: false
Note: The owner 0xfffffffc823ecc20 is the same thread that panic'ed.
So, the thread that is holding the mutex is trying to grab the same mutex again.
That results in a panic.
Cause
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