Hello everyone, I have an issue with my ssd where a btrfs partition is located. I have a /dev/sdb1 in ext4 for the /boot, and the rest of the ssd is /dev/sdb2 which is the root of my Archlinux. When I boot, it hangs up after loading the kernel. So I tried with an Archlinux liveboot, and I have the same behavior with the following trace in logs when I try to mount the btrfs partition : Apr 11 16:25:56 archiso kernel: INFO: task mount:573 blocked for more than 120 seconds. Apr 11 16:25:56 archiso kernel: Not tainted 3.19.2-1-ARCH #1 Apr 11 16:25:56 archiso kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Apr 11 16:25:56 archiso kernel: mount D ffff8807f1c937f8 0 573 524 0x00000004 Apr 11 16:25:56 archiso kernel: ffff8807f1c937f8 ffff8807f7d6ed50 0000000000013f00 ffff8807f1c93fd8 Apr 11 16:25:56 archiso kernel: 0000000000013f00 ffff8807f98109f0 ffff8807f7d6ed50 ffff8807ecce5ea0 Apr 11 16:25:56 archiso kernel: 0000000000000004 ffff8807f1c93758 ffffffffa048ec91 ffff8807ecce5ea0 Apr 11 16:25:56 archiso kernel: Call Trace: Apr 11 16:25:56 archiso kernel: [<ffffffffa048ec91>] ? set_extent_buffer_dirty+0x71/0xc0 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffffa0464796>] ? btrfs_buffer_uptodate+0x56/0x80 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffff8155e999>] schedule+0x29/0x70 Apr 11 16:25:56 archiso kernel: [<ffffffffa04a6745>] btrfs_tree_lock+0x65/0x200 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffff810b4380>] ? wait_woken+0x90/0x90 Apr 11 16:25:56 archiso kernel: [<ffffffffa0444cd9>] btrfs_search_slot+0x799/0xaa0 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffff810b43c0>] ? autoremove_wake_function+0x40/0x40 Apr 11 16:25:56 archiso kernel: [<ffffffffa04469f5>] btrfs_insert_empty_items+0x75/0xd0 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffffa04a6a37>] btrfs_insert_orphan_item+0x67/0xa0 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffffa04a912e>] insert_orphan_item+0x5e/0x90 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffffa04ab531>] replay_one_buffer+0x361/0x380 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffffa048e244>] ? alloc_extent_buffer+0x34/0x370 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffffa04a78f3>] walk_down_log_tree+0x1d3/0x410 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffffa04a7bfb>] walk_log_tree+0xcb/0x1d0 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffffa04af7f7>] btrfs_recover_log_trees+0x1e7/0x490 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffffa04ab1d0>] ? replay_one_dir_item+0xf0/0xf0 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffffa0467b3e>] open_ctree+0x17ae/0x2030 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffffa043c633>] btrfs_mount+0x843/0x920 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffff8117b7aa>] ? pcpu_alloc+0x35a/0x680 Apr 11 16:25:56 archiso kernel: [<ffffffff811d5d68>] mount_fs+0x38/0x1c0 Apr 11 16:25:56 archiso kernel: [<ffffffff8117bb05>] ? __alloc_percpu+0x15/0x20 Apr 11 16:25:56 archiso kernel: [<ffffffff811f116b>] vfs_kern_mount+0x6b/0x120 Apr 11 16:25:56 archiso kernel: [<ffffffff811f4184>] do_mount+0x224/0xb40 Apr 11 16:25:56 archiso kernel: [<ffffffff811f4dae>] SyS_mount+0x7e/0xe0 Apr 11 16:25:56 archiso kernel: [<ffffffff81562809>] system_call_fastpath+0x12/0x17 Apr 11 16:25:56 archiso kernel: INFO: task btrfs-transacti:596 blocked for more than 120 seconds. Apr 11 16:25:56 archiso kernel: Not tainted 3.19.2-1-ARCH #1 Apr 11 16:25:56 archiso kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Apr 11 16:25:56 archiso kernel: btrfs-transacti D ffff8807e8937d98 0 596 2 0x00000000 Apr 11 16:25:56 archiso kernel: ffff8807e8937d98 ffff8807f2e7bba0 0000000000013f00 ffff8807e8937fd8 Apr 11 16:25:56 archiso kernel: 0000000000013f00 ffff8807f9e76d50 ffff8807f2e7bba0 ffff8807eccb90c8 Apr 11 16:25:56 archiso kernel: ffff8807ecc79000 ffff880000000000 ffff8807ecc79000 ffff880700000033 Apr 11 16:25:56 archiso kernel: Call Trace: Apr 11 16:25:56 archiso kernel: [<ffffffff811b5d1a>] ? kmem_cache_alloc+0x16a/0x180 Apr 11 16:25:56 archiso kernel: [<ffffffffa043f7ca>] ? btrfs_free_path+0x2a/0x40 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffffa04c3213>] ? __btrfs_run_delayed_items+0xf3/0x1d0 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffff8155e999>] schedule+0x29/0x70 Apr 11 16:25:56 archiso kernel: [<ffffffffa046a555>] btrfs_commit_transaction+0x2a5/0xbe0 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffff810b4380>] ? wait_woken+0x90/0x90 Apr 11 16:25:56 archiso kernel: [<ffffffffa0465fc5>] transaction_kthread+0x1d5/0x240 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffffa0465df0>] ? btrfs_cleanup_transaction+0x5a0/0x5a0 [btrfs] Apr 11 16:25:56 archiso kernel: [<ffffffff81091748>] kthread+0xd8/0xf0 Apr 11 16:25:56 archiso kernel: [<ffffffff81091670>] ? kthread_create_on_node+0x1c0/0x1c0 Apr 11 16:25:56 archiso kernel: [<ffffffff81562758>] ret_from_fork+0x58/0x90 Apr 11 16:25:56 archiso kernel: [<ffffffff81091670>] ? kthread_create_on_node+0x1c0/0x1c0 Additional information : Label: none uuid: aa6b1bae-3c28-482d-a446-c31875f21cf0 Total devices 1 FS bytes used 64.63GiB devid 1 size 111.29GiB used 111.02GiB path /dev/sda2 btrfs-progs v3.19 Linux archiso 3.19.2-1-ARCH #1 SMP PREEMPT Wed Mar 18 16:21:02 CET 2015 x86_64 GNU/Linux And the full output from journald is available there : http://sprunge.us/jPMG Is it a known bug? Or does someone have an idea about how I could fix this issue? Thank you in advance. Olivier. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
