[ 579.507546] ------------[ cut here ]------------ [ 579.507566] WARNING: CPU: 1 PID: 2236 at mm/backing-dev.c:372 bdi_unregister+0x3a/0x50() [ 579.507570] Modules linked in: ... [ 579.507788] CPU: 1 PID: 2236 Comm: kworker/1:0 Not tainted 4.0.4-301.fc22.x86_64 #1 [ 579.507807] Workqueue: md_misc mddev_delayed_delete ... [ 579.507833] Call Trace: [ 579.507847] [<ffffffff81782644>] dump_stack+0x45/0x57 [ 579.507855] [<ffffffff8109c66a>] warn_slowpath_common+0x8a/0xc0 [ 579.507862] [<ffffffff8109c79a>] warn_slowpath_null+0x1a/0x20 [ 579.507870] [<ffffffff811c0a4a>] bdi_unregister+0x3a/0x50 [ 579.507880] [<ffffffff8137f5c1>] del_gendisk+0x131/0x240 [ 579.507888] [<ffffffff815e6853>] md_free+0x43/0x60 [ 579.507904] [<ffffffff8139e44a>] kobject_release+0x7a/0x1c0 [ 579.507911] [<ffffffff8139e2f5>] kobject_put+0x35/0x70 [ 579.507918] [<ffffffff815e4794>] mddev_delayed_delete+0x34/0x40 [ 579.507925] [<ffffffff810b596b>] process_one_work+0x1bb/0x410 [ 579.507932] [<ffffffff810b5c13>] worker_thread+0x53/0x470 [ 579.507939] [<ffffffff810b5bc0>] ? process_one_work+0x410/0x410 [ 579.507945] [<ffffffff810b5bc0>] ? process_one_work+0x410/0x410 [ 579.507952] [<ffffffff810bb678>] kthread+0xd8/0xf0 [ 579.507960] [<ffffffff810bb5a0>] ? kthread_worker_fn+0x180/0x180 [ 579.507969] [<ffffffff81788bd8>] ret_from_fork+0x58/0x90 [ 579.507977] [<ffffffff810bb5a0>] ? kthread_worker_fn+0x180/0x180 [ 579.507982] ---[ end trace b8bdede9e26ccf5c ]--- https://bugzilla.redhat.com/show_bug.cgi?id=1226621
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=aad653a https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/?id=aad653a
Fix is in Linus' tree.
mainline: 4.1-rc7: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/diff/block/genhd.c?id=v4.1-rc7&id2=v4.1-rc6 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/diff/include/linux/backing-dev.h?id=v4.1-rc7&id2=v4.1-rc6 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/diff/include/trace/events/writeback.h?id=v4.1-rc7&id2=v4.1-rc6 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/diff/mm/backing-dev.c?id=v4.1-rc7&id2=v4.1-rc6 Thanks.