I don't think I've seen this one reported yet.
This kernel was a 2.6.18rc3-gitSomething, but I don't think
anything has changed recently that would explain this?
Dave
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http://www.codemonkey.org.uk
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https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=201726
Summary: massive kernel spewage with DWARF2 unwinder errors
Product: Fedora Core
Version: fc6test2
Platform: x86_64
OS/Version: Linux
Status: NEW
Severity: high
Priority: normal
Component: kernel
AssignedTo: [email protected]
ReportedBy: [email protected]
QAContact: [email protected]
CC: [email protected]
Description of problem:
Version-Release number of selected component (if applicable):
2.6.17-1.2517.fc6 and 2.6.17-1.2530.fc6
How reproducible:
Steps to Reproduce:
1. Boot, and the fireworks begin early on at "checking if image is initramfs..."
2. Even after booting, there's a ton more spewage, seemingly at random when
doing things as simple as ssh/scp, and also when running the attached sysreport.
Actual results:
#######
checking if image is initramfs...
=============================================
[ INFO: possible recursive locking detected ]
---------------------------------------------
swapper/1 is trying to acquire lock:
(&nc->lock){....}, at: [<ffffffff8020782c>] kmem_cache_free+0x1a1/0x26c
but task is already holding lock:
(&nc->lock){....}, at: [<ffffffff8020b47e>] kfree+0x1b3/0x27e
other info that might help us debug this:
2 locks held by swapper/1:
#0: (&nc->lock){....}, at: [<ffffffff8020b47e>] kfree+0x1b3/0x27e
#1: (&parent->list_lock){....}, at: [<ffffffff802dae22>]
__drain_alien_cache+0x37/0
x77
stack backtrace:
Call Trace:
[<ffffffff8026e77d>] show_trace+0xae/0x30e
[<ffffffff8026e9f2>] dump_stack+0x15/0x17
[<ffffffff802a7f23>] __lock_acquire+0x135/0xa54
[<ffffffff802a8de3>] lock_acquire+0x4b/0x69
[<ffffffff8026774b>] _spin_lock+0x25/0x31
[<ffffffff8020782c>] kmem_cache_free+0x1a1/0x26c
[<ffffffff802da9a8>] slab_destroy+0x12b/0x138
[<ffffffff802dab5f>] free_block+0x1aa/0x1ee
[<ffffffff802dae48>] __drain_alien_cache+0x5d/0x77
[<ffffffff8020b49b>] kfree+0x1d0/0x27e
[<ffffffff80968444>] free+0x9/0xb
[<ffffffff80968461>] huft_free+0x1b/0x27
[<ffffffff8096961c>] inflate_dynamic+0x4f0/0x525
[<ffffffff80969b18>] unpack_to_rootfs+0x4c7/0x930
[<ffffffff80969fe6>] populate_rootfs+0x65/0xe7
[<ffffffff8026d710>] init+0x190/0x3cd
[<ffffffff8026135e>] child_rip+0x8/0x12
DWARF2 unwinder stuck at child_rip+0x8/0x12
Leftover inexact backtrace:
[<ffffffff80267a32>] _spin_unlock_irq+0x2b/0x31
[<ffffffff8026099c>] restore_args+0x0/0x30
[<ffffffff8036c696>] acpi_os_acquire_lock+0x9/0xb
[<ffffffff8026d580>] init+0x0/0x3cd
[<ffffffff80261356>] child_rip+0x0/0x12
it is
##############
############
sibling
task PC pid father child younger older
init S ffff8101442eda08 0 1 0 2 (NOTLB)
ffff8101442eda08 ffff8101442ed988 ffffffff806c0d80 0000000000000008
ffff81013fc6a040 ffffffff80567e80 000000a047ea2983 0000000000015fe9
ffff81013fc6a228 ffff810100000000 ffffffff806c0d80 ffff8101442eda08
Call Trace:
[<ffffffff80265886>] schedule_timeout+0x8c/0xb3
[<ffffffff8021204c>] do_select+0x470/0x4de
[<ffffffff802e705b>] core_sys_select+0x1b7/0x266
[<ffffffff80217106>] sys_select+0x147/0x172
[<ffffffff8026040e>] system_call+0x7e/0x83
DWARF2 unwinder stuck at system_call+0x7e/0x83
Leftover inexact backtrace:
migration/0 S ffff81013fc77e98 0 2 1 3 (L-TLB)
ffff81013fc77e98 0000000100000296 0000000000000002 0000000000000001
ffff8101442ea040 ffffffff80567e80 000000a0598b50f5 000000000000119a
ffff8101442ea228 ffff810100000000 0000000000000046 ffff81013fc77e78
Call Trace:
[<ffffffff80246a22>] migration_thread+0x1a2/0x23f
[<ffffffff802353fe>] kthread+0x100/0x136
[<ffffffff8026135e>] child_rip+0x8/0x12
DWARF2 unwinder stuck at child_rip+0x8/0x12
Leftover inexact backtrace:
[<ffffffff80267a32>] _spin_unlock_irq+0x2b/0x31
[<ffffffff8026099c>] restore_args+0x0/0x30
[<ffffffff802352fe>] kthread+0x0/0x136
[<ffffffff80261356>] child_rip+0x0/0x12
#########
Expected results:
No spewage
Additional info:
I'm seeing all of this behavior on an HP xw9300 workstation
------- Additional Comments From [email protected] 2006-08-08 11:27 EST -------
Created an attachment (id=133794)
--> (https://bugzilla.redhat.com/bugzilla/attachment.cgi?id=133794&action=view)
dmesg which includes the copious backtraces
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