Bug#908216: btrfs blocked for more than 120 seconds
Package: linux-image-4.18.0-0.bpo.1-amd64
Severity: important
Sep 22 17:15:44 lxc008 kernel: INFO: task backup cleanup:2165 blocked for more t
han 120 seconds.
Sep 22 17:15:44 lxc008 kernel: Tainted: G I 4.18.0-0.bpo.1-
amd64 #1 Debian 4.18.6-1~bpo9+1
Sep 22 17:15:44 lxc008 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Sep 22 17:15:44 lxc008 kernel: backup cleanup D 0 2165 1681 0x00000100
Sep 22 17:15:44 lxc008 kernel: Call Trace:
Sep 22 17:15:44 lxc008 kernel: ? __schedule+0x3f5/0x880
Sep 22 17:15:44 lxc008 kernel: schedule+0x32/0x80
Sep 22 17:15:44 lxc008 kernel: btrfs_start_ordered_extent+0xed/0x120 [btrfs]
Sep 22 17:15:44 lxc008 kernel: ? remove_wait_queue+0x60/0x60
Sep 22 17:15:44 lxc008 kernel: btrfs_wait_ordered_range+0xa0/0x100 [btrfs]
Sep 22 17:15:44 lxc008 kernel: btrfs_sync_file+0x1a7/0x420 [btrfs]
Sep 22 17:15:44 lxc008 kernel: do_fsync+0x38/0x60
Sep 22 17:15:44 lxc008 kernel: __x64_sys_fsync+0x10/0x20
Sep 22 17:15:44 lxc008 kernel: do_syscall_64+0x55/0x110
Sep 22 17:15:44 lxc008 kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9
Sep 22 17:15:44 lxc008 kernel: RIP: 0033:0x7f260b87a6ed
Sep 22 17:15:44 lxc008 kernel: Code: Bad RIP value.
Sep 22 17:15:44 lxc008 kernel: RSP: 002b:00007f25dfffddc0 EFLAGS: 00000293 ORIG_RAX: 000000000000004a
Sep 22 17:15:44 lxc008 kernel: RAX: ffffffffffffffda RBX: 00007f25dfffe080 RCX: 00007f260b87a6ed
Sep 22 17:15:44 lxc008 kernel: RDX: 0000000000000000 RSI: 00007f25e41d3c10 RDI: 000000000000005d
Sep 22 17:15:44 lxc008 kernel: RBP: 0000000000000000 R08: 0000558bfe6e0fe8 R09: 00007f25e41aae00
Sep 22 17:15:44 lxc008 kernel: R10: 00007f25e403ca50 R11: 0000000000000293 R12: 0000000000011940
Sep 22 17:15:44 lxc008 kernel: R13: 00007f25e407cc20 R14: 00007f25e4075df0 R15: 000000008ca00000
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