* [Qemu-devel] Livelock with qemu 2.5.0
@ 2016-12-02 14:19 Brian Candler
2016-12-02 15:54 ` Brian Candler
0 siblings, 1 reply; 2+ messages in thread
From: Brian Candler @ 2016-12-02 14:19 UTC (permalink / raw)
To: qemu-devel
[-- Attachment #1: Type: text/plain, Size: 1113 bytes --]
I am running a VM under qemu 2.5.0/Ubuntu 16.04. The guest VM is also
Ubuntu 16.04, with ZFS and LXD, and I am hitting it hard with I/O,
concurrently building multiple LXD containers. Previously it was
serialized to build one container at a time, and it was fine.
With the concurrent builds I got to a point where the VM livelocked:
- CPU utilisation on the host is 100%:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
20321 libvirt+ 20 0 18.864g 0.014t 23032 S 100.3 45.7 603:33.30
qemu-system-x86
(host has 32GB of RAM, plenty of headroom there)
- VM does not respond to ping
- I can connect to VM's VNC console, and it shows the login prompt, but
keystrokes are ignored
I attached gdb and took backtraces (attached)
I imagine I could have hit a problem either with qemu, or with the guest
kernel itself. So next I'm going to try to replicate this with qemu
2.7.0. But I thought I'd post the backtraces here first to see if
anyone has any comments/thoughts about what's going on.
Thanks,
Brian.
P.S. I'm not subscribed to qemu-devel so please CC me directly.
[-- Attachment #2: qemu-2.5.0-livelock.txt --]
[-- Type: text/plain, Size: 9199 bytes --]
# gdb -p 20321 /usr/bin/qemu-system-x86_64
GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.04) 7.11.1
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /usr/bin/qemu-system-x86_64...(no debugging symbols found)...done.
Attaching to program: /usr/bin/qemu-system-x86_64, process 20321
[New LWP 20322]
[New LWP 20325]
[New LWP 20326]
[New LWP 20327]
[New LWP 20328]
[New LWP 20329]
[New LWP 20330]
[New LWP 20331]
[New LWP 20332]
[New LWP 20334]
warning: .dynamic section for "/usr/lib/x86_64-linux-gnu/librbd.so.1" is not at the expected address (wrong library or version mismatch?)
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f9b6957fc21 in __GI_ppoll (fds=0x559d5388e080, nfds=10, timeout=<optimised out>, sigmask=0x0)
at ../sysdeps/unix/sysv/linux/ppoll.c:50
50 ../sysdeps/unix/sysv/linux/ppoll.c: No such file or directory.
(gdb) bt
#0 0x00007f9b6957fc21 in __GI_ppoll (fds=0x559d5388e080, nfds=10, timeout=<optimised out>,
sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:50
#1 0x0000559d516ec8d9 in qemu_poll_ns ()
#2 0x0000559d516ec36a in main_loop_wait ()
#3 0x0000559d5146f2d4 in main ()
(gdb) info threads
Id Target Id Frame
* 1 Thread 0x7f9b6e86bc00 (LWP 20321) "qemu-system-x86" 0x00007f9b6957fc21 in __GI_ppoll (
fds=0x559d5388e080, nfds=10, timeout=<optimised out>, sigmask=0x0)
at ../sysdeps/unix/sysv/linux/ppoll.c:50
2 Thread 0x7f9b63727700 (LWP 20322) "qemu-system-x86" syscall ()
at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
3 Thread 0x7f9b4933d700 (LWP 20325) "qemu-system-x86" 0x00007f9b69581357 in ioctl ()
at ../sysdeps/unix/syscall-template.S:84
4 Thread 0x7f9b48b3c700 (LWP 20326) "qemu-system-x86" 0x00007f9b69581357 in ioctl ()
at ../sysdeps/unix/syscall-template.S:84
5 Thread 0x7f9b3bfff700 (LWP 20327) "qemu-system-x86" 0x00007f9b69581357 in ioctl ()
at ../sysdeps/unix/syscall-template.S:84
6 Thread 0x7f9b3b7fe700 (LWP 20328) "qemu-system-x86" 0x00007f9b69581357 in ioctl ()
at ../sysdeps/unix/syscall-template.S:84
7 Thread 0x7f9b3affd700 (LWP 20329) "qemu-system-x86" 0x00007f9b69581357 in ioctl ()
at ../sysdeps/unix/syscall-template.S:84
8 Thread 0x7f9b3a7fc700 (LWP 20330) "qemu-system-x86" 0x00007f9b69581357 in ioctl ()
at ../sysdeps/unix/syscall-template.S:84
9 Thread 0x7f9b39ffb700 (LWP 20331) "qemu-system-x86" 0x00007f9b69581357 in ioctl ()
at ../sysdeps/unix/syscall-template.S:84
10 Thread 0x7f9b397fa700 (LWP 20332) "qemu-system-x86" 0x00007f9b69581357 in ioctl ()
at ../sysdeps/unix/syscall-template.S:84
11 Thread 0x7f979bbff700 (LWP 20334) "qemu-system-x86" pthread_cond_wait@@GLIBC_2.3.2 ()
at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
(gdb) thread 2
[Switching to thread 2 (Thread 0x7f9b63727700 (LWP 20322))]
#0 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
38 ../sysdeps/unix/sysv/linux/x86_64/syscall.S: No such file or directory.
(gdb) bt
#0 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1 0x0000559d5175d101 in qemu_event_wait ()
#2 0x0000559d5176b5be in ?? ()
#3 0x00007f9b6985570a in start_thread (arg=0x7f9b63727700) at pthread_create.c:333
#4 0x00007f9b6958b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
(gdb) thread 3
[Switching to thread 3 (Thread 0x7f9b4933d700 (LWP 20325))]
#0 0x00007f9b69581357 in ioctl () at ../sysdeps/unix/syscall-template.S:84
84 ../sysdeps/unix/syscall-template.S: No such file or directory.
(gdb) bt
#0 0x00007f9b69581357 in ioctl () at ../sysdeps/unix/syscall-template.S:84
#1 0x0000559d514b0e44 in kvm_vcpu_ioctl ()
#2 0x0000559d514b0efd in kvm_cpu_exec ()
#3 0x0000559d5149f8d2 in ?? ()
#4 0x00007f9b6985570a in start_thread (arg=0x7f9b4933d700) at pthread_create.c:333
#5 0x00007f9b6958b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
(gdb) thread 4
[Switching to thread 4 (Thread 0x7f9b48b3c700 (LWP 20326))]
#0 0x00007f9b69581357 in ioctl () at ../sysdeps/unix/syscall-template.S:84
84 in ../sysdeps/unix/syscall-template.S
(gdb) bt
#0 0x00007f9b69581357 in ioctl () at ../sysdeps/unix/syscall-template.S:84
#1 0x0000559d514b0e44 in kvm_vcpu_ioctl ()
#2 0x0000559d514b0efd in kvm_cpu_exec ()
#3 0x0000559d5149f8d2 in ?? ()
#4 0x00007f9b6985570a in start_thread (arg=0x7f9b48b3c700) at pthread_create.c:333
#5 0x00007f9b6958b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
(gdb) thread 5
[Switching to thread 5 (Thread 0x7f9b3bfff700 (LWP 20327))]
#0 0x00007f9b69581357 in ioctl () at ../sysdeps/unix/syscall-template.S:84
84 in ../sysdeps/unix/syscall-template.S
(gdb) bt
#0 0x00007f9b69581357 in ioctl () at ../sysdeps/unix/syscall-template.S:84
#1 0x0000559d514b0e44 in kvm_vcpu_ioctl ()
#2 0x0000559d514b0efd in kvm_cpu_exec ()
#3 0x0000559d5149f8d2 in ?? ()
#4 0x00007f9b6985570a in start_thread (arg=0x7f9b3bfff700) at pthread_create.c:333
#5 0x00007f9b6958b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
(gdb) thread 6
[Switching to thread 6 (Thread 0x7f9b3b7fe700 (LWP 20328))]
#0 0x00007f9b69581357 in ioctl () at ../sysdeps/unix/syscall-template.S:84
84 in ../sysdeps/unix/syscall-template.S
(gdb) bt
#0 0x00007f9b69581357 in ioctl () at ../sysdeps/unix/syscall-template.S:84
#1 0x0000559d514b0e44 in kvm_vcpu_ioctl ()
#2 0x0000559d514b0efd in kvm_cpu_exec ()
#3 0x0000559d5149f8d2 in ?? ()
#4 0x00007f9b6985570a in start_thread (arg=0x7f9b3b7fe700) at pthread_create.c:333
#5 0x00007f9b6958b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
(gdb) thread 7
[Switching to thread 7 (Thread 0x7f9b3affd700 (LWP 20329))]
#0 0x00007f9b69581357 in ioctl () at ../sysdeps/unix/syscall-template.S:84
84 in ../sysdeps/unix/syscall-template.S
(gdb) bt
#0 0x00007f9b69581357 in ioctl () at ../sysdeps/unix/syscall-template.S:84
#1 0x0000559d514b0e44 in kvm_vcpu_ioctl ()
#2 0x0000559d514b0efd in kvm_cpu_exec ()
#3 0x0000559d5149f8d2 in ?? ()
#4 0x00007f9b6985570a in start_thread (arg=0x7f9b3affd700) at pthread_create.c:333
#5 0x00007f9b6958b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
(gdb) thread 8
[Switching to thread 8 (Thread 0x7f9b3a7fc700 (LWP 20330))]
#0 0x00007f9b69581357 in ioctl () at ../sysdeps/unix/syscall-template.S:84
84 in ../sysdeps/unix/syscall-template.S
(gdb) bt
#0 0x00007f9b69581357 in ioctl () at ../sysdeps/unix/syscall-template.S:84
#1 0x0000559d514b0e44 in kvm_vcpu_ioctl ()
#2 0x0000559d514b0efd in kvm_cpu_exec ()
#3 0x0000559d5149f8d2 in ?? ()
#4 0x00007f9b6985570a in start_thread (arg=0x7f9b3a7fc700) at pthread_create.c:333
#5 0x00007f9b6958b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
(gdb) thread 9
[Switching to thread 9 (Thread 0x7f9b39ffb700 (LWP 20331))]
#0 0x00007f9b69581357 in ioctl () at ../sysdeps/unix/syscall-template.S:84
84 in ../sysdeps/unix/syscall-template.S
(gdb) bt
#0 0x00007f9b69581357 in ioctl () at ../sysdeps/unix/syscall-template.S:84
#1 0x0000559d514b0e44 in kvm_vcpu_ioctl ()
#2 0x0000559d514b0efd in kvm_cpu_exec ()
#3 0x0000559d5149f8d2 in ?? ()
#4 0x00007f9b6985570a in start_thread (arg=0x7f9b39ffb700) at pthread_create.c:333
#5 0x00007f9b6958b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
(gdb) thread 10
[Switching to thread 10 (Thread 0x7f9b397fa700 (LWP 20332))]
#0 0x00007f9b69581357 in ioctl () at ../sysdeps/unix/syscall-template.S:84
84 in ../sysdeps/unix/syscall-template.S
(gdb) bt
#0 0x00007f9b69581357 in ioctl () at ../sysdeps/unix/syscall-template.S:84
#1 0x0000559d514b0e44 in kvm_vcpu_ioctl ()
#2 0x0000559d514b0efd in kvm_cpu_exec ()
#3 0x0000559d5149f8d2 in ?? ()
#4 0x00007f9b6985570a in start_thread (arg=0x7f9b397fa700) at pthread_create.c:333
#5 0x00007f9b6958b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
(gdb) thread 11
[Switching to thread 11 (Thread 0x7f979bbff700 (LWP 20334))]
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
185 ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S: No such file or directory.
(gdb) bt
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1 0x0000559d5175ce09 in qemu_cond_wait ()
#2 0x0000559d516dc32b in ?? ()
#3 0x0000559d516dc848 in ?? ()
#4 0x00007f9b6985570a in start_thread (arg=0x7f979bbff700) at pthread_create.c:333
#5 0x00007f9b6958b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
(gdb) cont
Continuing.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [Qemu-devel] Livelock with qemu 2.5.0
2016-12-02 14:19 [Qemu-devel] Livelock with qemu 2.5.0 Brian Candler
@ 2016-12-02 15:54 ` Brian Candler
0 siblings, 0 replies; 2+ messages in thread
From: Brian Candler @ 2016-12-02 15:54 UTC (permalink / raw)
To: qemu-devel
On 02/12/2016 14:19, Brian Candler wrote:
> I am running a VM under qemu 2.5.0/Ubuntu 16.04. The guest VM is also
> Ubuntu 16.04, with ZFS and LXD
Correction: it's btrfs (not zfs).
I re-ran the test with qemu 2.7.0, and this time got a btrfs kernel
panic in the guest [below].
The guest is running kernel 4.4.0-45, which I can update to 4.4.0-51 and
retry. But at the moment this looks like a kernel btrfs bug, not a qemu
bug. Sorry for the noise.
Regards,
Brian.
[ 808.782266] BUG: unable to handle kernel
[ 808.786126] ------------[ cut here ]------------
[ 808.786152] WARNING: CPU: 2 PID: 25962 at
/build/linux-kOWph6/linux-4.4.0/fs/btrfs/inode.c:9374
btrfs_rename2+0x386/0x7b0 [btrfs]()
[ 808.786160] BTRFS: Transaction aborted (error -2)
[ 808.786160] Modules linked in:
[ 808.786161] binfmt_misc
[ 808.786162] veth
[ 808.786163] ufs
[ 808.786163] qnx4
[ 808.786163] hfsplus
[ 808.786164] hfs
[ 808.786164] minix
[ 808.786165] ntfs
[ 808.786165] msdos
[ 808.786166] jfs
[ 808.786166] xfs
[ 808.786167] xt_CHECKSUM
[ 808.786168] iptable_mangle
[ 808.786168] xt_comment
[ 808.786169] xt_tcpudp
[ 808.786169] bridge
[ 808.786170] stp
[ 808.786170] llc
[ 808.786170] ip6table_filter
[ 808.786171] ip6t_MASQUERADE
[ 808.786171] nf_nat_masquerade_ipv6
[ 808.786172] ip6table_nat
[ 808.786173] nf_conntrack_ipv6
[ 808.786173] nf_defrag_ipv6
[ 808.786173] nf_nat_ipv6
[ 808.786174] ip6_tables
[ 808.786174] iptable_filter
[ 808.786175] ipt_MASQUERADE
[ 808.786175] nf_nat_masquerade_ipv4
[ 808.786176] iptable_nat
[ 808.786176] nf_conntrack_ipv4
[ 808.786177] nf_defrag_ipv4
[ 808.786177] nf_nat_ipv4
[ 808.786178] nf_nat
[ 808.786178] nf_conntrack
[ 808.786179] ip_tables
[ 808.786179] x_tables
[ 808.786180] ppdev
[ 808.786180] kvm_intel
[ 808.786181] input_leds
[ 808.786181] kvm
[ 808.786182] irqbypass
[ 808.786182] joydev
[ 808.786182] parport_pc
[ 808.786183] serio_raw
[ 808.786184] 8250_fintek
[ 808.786184] parport
[ 808.786185] mac_hid
[ 808.786185] i2c_piix4
[ 808.786185] ib_iser
[ 808.786186] rdma_cm
[ 808.786186] iw_cm
[ 808.786187] ib_cm
[ 808.786187] ib_sa
[ 808.786188] ib_mad
[ 808.786188] ib_core
[ 808.786189] ib_addr
[ 808.786189] iscsi_tcp
[ 808.786190] libiscsi_tcp
[ 808.786190] libiscsi
[ 808.786191] scsi_transport_iscsi
[ 808.786191] autofs4
[ 808.786191] btrfs
[ 808.786192] raid10
[ 808.786192] raid456
[ 808.786193] async_raid6_recov
[ 808.786193] async_memcpy
[ 808.786194] async_pq
[ 808.786194] async_xor
[ 808.786195] async_tx
[ 808.786195] xor
[ 808.786196] raid6_pq
[ 808.786196] libcrc32c
[ 808.786197] raid1
[ 808.786197] raid0
[ 808.786198] multipath
[ 808.786198] linear
[ 808.786199] cirrus
[ 808.786199] crct10dif_pclmul
[ 808.786200] crc32_pclmul
[ 808.786200] ttm
[ 808.786200] drm_kms_helper
[ 808.786201] aesni_intel
[ 808.786201] syscopyarea
[ 808.786202] sysfillrect
[ 808.786202] aes_x86_64
[ 808.786203] sysimgblt
[ 808.786203] lrw
[ 808.786204] fb_sys_fops
[ 808.786204] gf128mul
[ 808.786205] glue_helper
[ 808.786205] ablk_helper
[ 808.786206] cryptd
[ 808.786206] psmouse
[ 808.786206] drm
[ 808.786207] virtio_scsi
[ 808.786207] pata_acpi
[ 808.786208] floppy
[ 808.786211] CPU: 2 PID: 25962 Comm: dpkg Not tainted 4.4.0-45-generic
#66-Ubuntu
[ 808.786212] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS rel-1.9.3-0-ge2fc41e-prebuilt.qemu-project.org 04/01/2014
[ 808.786213] 0000000000000286
[ 808.786213] 0000000039ded762
[ 808.786214] ffff88010184bce0
[ 808.786214] ffffffff813f1fe3
[ 808.786215] ffff88010184bd28
[ 808.786215] ffffffffc03e8220
[ 808.786216] ffff88010184bd18
[ 808.786216] ffffffff81081212
[ 808.786217] ffff880138389538
[ 808.786217] 00000000000145e8
[ 808.786218] ffff880115ef1538
[ 808.786218] ffff88016315c418
[ 808.786219] Call Trace:
[ 808.786224] [<ffffffff813f1fe3>] dump_stack+0x63/0x90
[ 808.786227] [<ffffffff81081212>] warn_slowpath_common+0x82/0xc0
[ 808.786229] [<ffffffff810812ac>] warn_slowpath_fmt+0x5c/0x80
[ 808.786246] [<ffffffffc0371996>] btrfs_rename2+0x386/0x7b0 [btrfs]
[ 808.786249] [<ffffffff81217f01>] ? __inode_permission+0x1/0xb0
[ 808.786251] [<ffffffff8121adbc>] vfs_rename+0x58c/0x8e0
[ 808.786254] [<ffffffff81344900>] ?
security_kernel_fw_from_file+0x40/0x70
[ 808.786255] [<ffffffff8121fc3f>] SyS_rename+0x39f/0x3c0
[ 808.786259] [<ffffffff818318b2>] entry_SYSCALL_64_fastpath+0x16/0x71
[ 808.786260] ---[ end trace 9067db09b6daeaab ]---
[ 808.786262] BTRFS: error (device sda1) in btrfs_rename:9374: errno=-2
No such entry
[ 808.786263] BTRFS info (device sda1): forced readonly
[ 808.961571] paging request
[ 808.963405] at fffffffffffffe58
[ 808.965154] IP: [<ffffffffc0368d3c>] __btrfs_unlink_inode+0x1c/0x470
[btrfs]
[ 808.967516] PGD 1e0d067 PUD 1e0f067 PMD 0
[ 808.969640] Oops: 0000 [#1] SMP
[ 808.971654] Modules linked in: binfmt_misc veth ufs qnx4 hfsplus hfs
minix ntfs msdos jfs xfs xt_CHECKSUM iptable_mangle xt_comment xt_tcpudp
bridge stp llc ip6table_filter ip6t_MASQUERADE nf_nat_masquerade_ipv6
ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6_tables
iptable_filter ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat
nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack
ip_tables x_tables ppdev kvm_intel input_leds kvm irqbypass joydev
parport_pc serio_raw 8250_fintek parport mac_hid i2c_piix4 ib_iser
rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp
libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456
async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq
libcrc32c raid1 raid0 multipath linear cirrus crct10dif_pclmul
[ 808.991391] crc32_pclmul ttm drm_kms_helper aesni_intel syscopyarea
sysfillrect aes_x86_64 sysimgblt lrw fb_sys_fops gf128mul glue_helper
ablk_helper cryptd psmouse drm virtio_scsi pata_acpi floppy
[ 808.997652] CPU: 0 PID: 20735 Comm: dpkg Tainted: G W
4.4.0-45-generic #66-Ubuntu
[ 809.000758] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS rel-1.9.3-0-ge2fc41e-prebuilt.qemu-project.org 04/01/2014
[ 809.006530] task: ffff880287caac40 ti: ffff8800733a8000 task.ti:
ffff8800733a8000
[ 809.009620] RIP: 0010:[<ffffffffc0368d3c>] [<ffffffffc0368d3c>]
__btrfs_unlink_inode+0x1c/0x470 [btrfs]
[ 809.012942] RSP: 0018:ffff8800733abd08 EFLAGS: 00010282
[ 809.015766] RAX: ffff8802eb6dfdb0 RBX: ffff88010c748598 RCX:
0000000000000000
[ 809.042530] RDX: ffff88010c748598 RSI: ffff880256bc0000 RDI:
ffff8803aeea9850
[ 809.045379] RBP: ffff8800733abd80 R08: 0000000000000000 R09:
00000000ffffffff
[ 809.048307] R10: 00000000157d46a0 R11: 0000000000000002 R12:
0000000000000000
[ 809.051271] R13: ffff8801e5acf6e0 R14: 0000000000000000 R15:
ffff88014d7f2f00
[ 809.054167] FS: 00007f0ab8677800(0000) GS:ffff8803bfc00000(0000)
knlGS:0000000000000000
[ 809.058724] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 809.071232] CR2: fffffffffffffe58 CR3: 0000000307f90000 CR4:
00000000003406f0
[ 809.074297] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 809.086657] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 809.089377] Stack:
[ 809.091519] ffff88014d7f2f38 ffff8803aeea9850 ffff88000000000e
000000000000238b
[ 809.094282] 386c8800733abd80 7d0c000000000001 000000000000007b
ffffffff810caa91
[ 809.097019] 0000000000000002 ffffea000c9e7080 ffff88010c748598
000000000001386c
[ 809.099746] Call Trace:
[ 809.101950] [<ffffffff810caa91>] ?
__raw_callee_save___pv_queued_spin_unlock+0x11/0x20
[ 809.104744] [<ffffffffc0371954>] btrfs_rename2+0x344/0x7b0 [btrfs]
[ 809.107358] [<ffffffff8121adbc>] vfs_rename+0x58c/0x8e0
[ 809.109810] [<ffffffff81344900>] ?
security_kernel_fw_from_file+0x40/0x70
[ 809.112490] [<ffffffff8121fc3f>] SyS_rename+0x39f/0x3c0
[ 809.115029] [<ffffffff818318b2>] entry_SYSCALL_64_fastpath+0x16/0x71
[ 809.117687] Code: ff e9 41 ff ff ff 48 8b 53 40 eb eb 0f 1f 00 0f 1f
44 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 49 89 cc 53 48 89 d3 48 83
ec 50 <4c> 8b a9 58 fe ff ff 65 48 8b 04 25 28 00 00 00 48 89 44 24 48
[ 809.124816] RIP [<ffffffffc0368d3c>] __btrfs_unlink_inode+0x1c/0x470
[btrfs]
[ 809.127667] RSP <ffff8800733abd08>
[ 809.130057] CR2: fffffffffffffe58
[ 809.135772] ---[ end trace 9067db09b6daeaac ]---
[ 809.211377] lxdbr0: port 33(vethTL9MO4) entered forwarding state
^ permalink raw reply [flat|nested] 2+ messages in thread
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2016-12-02 14:19 [Qemu-devel] Livelock with qemu 2.5.0 Brian Candler
2016-12-02 15:54 ` Brian Candler
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