Hi,
Thanks for your report.
I've sent a patch to btrfs community to fix this issue, currently it's
not merged.
Regards,
Xiaoguang Wang
On 09/01/2016 04:32 PM, kernel test robot wrote:
FYI, we noticed the following commit:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit 18513091af9483ba84328d42092bd4d42a3c958f ("btrfs: update btrfs_space_info's
bytes_may_use timely")
in testcase: xfstests
with following parameters:
disk: 4HDD
fs: btrfs
test: generic-quick1
on test machine: qemu-system-x86_64 -enable-kvm -cpu qemu64,+ssse3 -smp 4 -m 4G
caused below changes:
+---------------------------------------------------------------------------+------------+------------+
| |
4824f1f412 | 18513091af |
+---------------------------------------------------------------------------+------------+------------+
| boot_successes | 8
| 0 |
| boot_failures | 0
| 4 |
| WARNING:at_fs/btrfs/extent-tree.c:#btrfs_free_block_groups[btrfs] | 0
| 4 |
+---------------------------------------------------------------------------+------------+------------+
[ 279.132633] BTRFS info (device dm-0): has skinny extents
[ 279.242965] BTRFS info (device dm-0): checking UUID tree
[ 279.522977] ------------[ cut here ]------------
[ 279.524657] WARNING: CPU: 3 PID: 14091 at fs/btrfs/extent-tree.c:10008
btrfs_free_block_groups+0x29b/0x420 [btrfs]
[ 279.531051] Modules linked in: dm_flakey btrfs xor raid6_pq dm_mod
rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver sg sr_mod cdrom ata_generic
pata_acpi snd_pcm snd_timer ata_piix snd soundcore pcspkr ppdev serio_raw
libata floppy i2c_piix4 parport_pc parport acpi_cpufreq
[ 279.550377] CPU: 3 PID: 14091 Comm: umount Not tainted
4.7.0-rc6-00087-g1851309 #1
[ 279.556229] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
Debian-1.8.2-1 04/01/2014
[ 279.562315] 0000000000000000 ffff880124b7fcf0 ffffffff8143669b
0000000000000000
[ 279.568558] 0000000000000000 ffff880124b7fd30 ffffffff8107d3fb
0000271800000000
[ 279.574784] ffff88007e965288 ffff8800aacb4000 ffff88007e965200
ffff88007e964e00
[ 279.581047] Call Trace:
[ 279.582259] [<ffffffff8143669b>] dump_stack+0x63/0x88
[ 279.587003] [<ffffffff8107d3fb>] __warn+0xcb/0xf0
[ 279.588640] [<ffffffff8107d4ed>] warn_slowpath_null+0x1d/0x20
[ 279.593536] [<ffffffffa02a708b>] btrfs_free_block_groups+0x29b/0x420 [btrfs]
[ 279.598666] [<ffffffffa02b9092>] close_ctree+0x192/0x370 [btrfs]
[ 279.600538] [<ffffffff8121f1e9>] ? evict_inodes+0x189/0x1a0
[ 279.605395] [<ffffffffa02899c9>] btrfs_put_super+0x19/0x20 [btrfs]
[ 279.610339] [<ffffffff81203acf>] generic_shutdown_super+0x6f/0x100
[ 279.612236] [<ffffffff81203df2>] kill_anon_super+0x12/0x20
[ 279.617083] [<ffffffffa028a7a8>] btrfs_kill_super+0x18/0x110 [btrfs]
[ 279.622070] [<ffffffff81203fa3>] deactivate_locked_super+0x43/0x70
[ 279.623980] [<ffffffff8120448a>] deactivate_super+0x5a/0x60
[ 279.628770] [<ffffffff8122288f>] cleanup_mnt+0x3f/0x90
[ 279.630304] [<ffffffff81222922>] __cleanup_mnt+0x12/0x20
[ 279.634894] [<ffffffff8109b138>] task_work_run+0x88/0xc0
[ 279.636419] [<ffffffff81003312>] exit_to_usermode_loop+0xc2/0xd0
[ 279.638171] [<ffffffff81003c31>] syscall_return_slowpath+0xa1/0xb0
[ 279.639841] [<ffffffff8190d37a>] entry_SYSCALL_64_fastpath+0xa2/0xa4
[ 279.658835] ---[ end trace 4976d490d5aef958 ]---
[ 279.660401] BTRFS: space_info 1 has 8126464 free, is not full
To reproduce:
git clone
git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
Thanks,
Xiaolong
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