I'm also getting kcompactd0 hanging on its own on another host, which presumably blocks btrfs-transaction later on: [606364.285752] INFO: task kcompactd0:27 blocked for more than 120 seconds. [606364.285994] Not tainted 4.15.0-112-generic #113-Ubuntu [606364.286129] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [606364.286268] kcompactd0 D 0 27 2 0x80000000 [606364.286270] Call Trace: [606364.286284] __schedule+0x24e/0x880 [606364.286341] ? btree_releasepage+0x42/0x50 [btrfs] [606364.286343] schedule+0x2c/0x80 [606364.286344] io_schedule+0x16/0x40 [606364.286345] __lock_page+0xff/0x140 [606364.286347] ? page_cache_tree_insert+0xe0/0xe0 [606364.286348] migrate_pages+0x91f/0xb80 [606364.286349] ? __ClearPageMovable+0x10/0x10 [606364.286350] ? isolate_freepages_block+0x3b0/0x3b0 [606364.286351] compact_zone+0x681/0x950 [606364.286352] kcompactd_do_work+0xfe/0x2a0 [606364.286354] ? __switch_to_asm+0x35/0x70 [606364.286355] ? __switch_to_asm+0x41/0x70 [606364.286356] kcompactd+0x86/0x1c0 [606364.286357] ? kcompactd+0x86/0x1c0 [606364.286358] ? wait_woken+0x80/0x80 [606364.286360] kthread+0x121/0x140 [606364.286361] ? kcompactd_do_work+0x2a0/0x2a0 [606364.286361] ? kthread_create_worker_on_cpu+0x70/0x70 [606364.286363] ret_from_fork+0x35/0x40
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1891773 Title: kcompactd0 and btrfs-transaction keep deadlocking with each other To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1891773/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
