Just wanted to add this as it might be useful (I'm trying to do
troubleshooting):
crash> dis -rl ffffffff810af2f8
/build/buildd/linux-lts-utopic-3.16.0/kernel/sched/fair.c: 4745
0xffffffff810af280 <pick_next_task_fair>: nopl 0x0(%rax,%rax,1)
0xffffffff810af285 <pick_next_task_fair+5>: push %rbp
/build/buildd/linux-lts-utopic-3.16.0/kernel/sched/fair.c: 4746
0xffffffff810af286 <pick_next_task_fair+6>: lea 0x80(%rdi),%rax
/build/buildd/linux-lts-utopic-3.16.0/kernel/sched/fair.c: 4745
0xffffffff810af28d <pick_next_task_fair+13>: mov %rsp,%rbp
0xffffffff810af290 <pick_next_task_fair+16>: push %r15
0xffffffff810af292 <pick_next_task_fair+18>: mov %rdi,%r15
0xffffffff810af295 <pick_next_task_fair+21>: push %r14
0xffffffff810af297 <pick_next_task_fair+23>: push %r13
0xffffffff810af299 <pick_next_task_fair+25>: push %r12
0xffffffff810af29b <pick_next_task_fair+27>: push %rbx
0xffffffff810af29c <pick_next_task_fair+28>: sub $0x30,%rsp
/build/buildd/linux-lts-utopic-3.16.0/kernel/sched/fair.c: 4746
0xffffffff810af2a0 <pick_next_task_fair+32>: mov %rax,-0x58(%rbp)
/build/buildd/linux-lts-utopic-3.16.0/kernel/sched/fair.c: 4745
0xffffffff810af2a4 <pick_next_task_fair+36>: mov %rsi,-0x48(%rbp)
/build/buildd/linux-lts-utopic-3.16.0/kernel/sched/fair.c: 6787
0xffffffff810af2a8 <pick_next_task_fair+40>: mov $0x130c0,%rax
0xffffffff810af2af <pick_next_task_fair+47>: mov %rax,-0x50(%rbp)
/build/buildd/linux-lts-utopic-3.16.0/kernel/sched/fair.c: 4753
0xffffffff810af2b3 <pick_next_task_fair+51>: mov 0x90(%r15),%edi
0xffffffff810af2ba <pick_next_task_fair+58>: test %edi,%edi
0xffffffff810af2bc <pick_next_task_fair+60>: je 0xffffffff810af318
<pick_next_task_fair+152>
/build/buildd/linux-lts-utopic-3.16.0/kernel/sched/fair.c: 4756
0xffffffff810af2be <pick_next_task_fair+62>: mov -0x48(%rbp),%rax
0xffffffff810af2c2 <pick_next_task_fair+66>: mov 0x60(%rax),%rax
0xffffffff810af2c6 <pick_next_task_fair+70>: cmp $0xffffffff818147e0,%rax
0xffffffff810af2cc <pick_next_task_fair+76>: je 0xffffffff810af790
<pick_next_task_fair+1296>
/build/buildd/linux-lts-utopic-3.16.0/kernel/sched/sched.h: 1160
0xffffffff810af2d2 <pick_next_task_fair+82>: mov -0x48(%rbp),%rsi
0xffffffff810af2d6 <pick_next_task_fair+86>: mov %r15,%rdi
0xffffffff810af2d9 <pick_next_task_fair+89>: callq *0x38(%rax)
0xffffffff810af2dc <pick_next_task_fair+92>: mov -0x58(%rbp),%r12
/build/buildd/linux-lts-utopic-3.16.0/kernel/sched/fair.c: 4835
0xffffffff810af2e0 <pick_next_task_fair+96>: xor %esi,%esi
0xffffffff810af2e2 <pick_next_task_fair+98>: mov %r12,%rdi
0xffffffff810af2e5 <pick_next_task_fair+101>: callq 0xffffffff810a66e0
<pick_next_entity>
/build/buildd/linux-lts-utopic-3.16.0/kernel/sched/fair.c: 4836
0xffffffff810af2ea <pick_next_task_fair+106>: mov %r12,%rdi
/build/buildd/linux-lts-utopic-3.16.0/kernel/sched/fair.c: 4835
0xffffffff810af2ed <pick_next_task_fair+109>: mov %rax,%rbx
/build/buildd/linux-lts-utopic-3.16.0/kernel/sched/fair.c: 4836
0xffffffff810af2f0 <pick_next_task_fair+112>: mov %rax,%rsi
0xffffffff810af2f3 <pick_next_task_fair+115>: callq 0xffffffff810a7d20
<set_next_entity>
/build/buildd/linux-lts-utopic-3.16.0/kernel/sched/fair.c: 4747
0xffffffff810af2f8 <pick_next_task_fair+120>: mov 0x158(%rbx),%r12
crash> cfs_rq ffff883ffedf3140
struct cfs_rq {
load = {
weight = 0,
inv_weight = 0
},
nr_running = 0,
h_nr_running = 0,
exec_clock = 50727270151190,
min_vruntime = 1126033353437518,
tasks_timeline = {
rb_node = 0x0
},
rb_leftmost = 0x0,
curr = 0x0,
next = 0x0,
last = 0x0,
skip = 0x0,
nr_spread_over = 960,
runnable_load_avg = 0,
blocked_load_avg = 108,
decay_counter = {
counter = 139289244
},
last_decay = 139289243,
removed_load = {
counter = 0
},
tg_runnable_contrib = 329,
tg_load_contrib = 108,
h_load = 75,
last_h_load_update = 4331424052,
h_load_next = 0xffff883fcab5d600,
rq = 0xffff883ffedf30c0,
on_list = 1,
leaf_cfs_rq_list = {
next = 0xffff883eec13eec0,
prev = 0xffff883fcab5fec0
},
tg = 0xffffffff81ebdd80 <root_task_group>,
runtime_enabled = 0,
runtime_expires = 0,
runtime_remaining = 0,
throttled_clock = 0,
throttled_clock_task = 0,
throttled_clock_task_time = 0,
throttled = 0,
throttle_count = 0,
throttled_list = {
next = 0xffff883ffedf3250,
prev = 0xffff883ffedf3250
}
}
crash>
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https://bugs.launchpad.net/bugs/1458045
Title:
KVM and CFS bandwidth control causes kernel crashes (oops)
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