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Re: [Qemu-devel] Livelock with qemu 2.5.0
From: |
Brian Candler |
Subject: |
Re: [Qemu-devel] Livelock with qemu 2.5.0 |
Date: |
Fri, 2 Dec 2016 15:54:46 +0000 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 |
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