From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomasz Chmielewski Subject: 4.0.5: WARNING: CPU: 3 PID: 249 at /home/kernel/COD/linux/mm/backing-dev.c:372 bdi_unregister+0x36/0x40() Date: Mon, 15 Jun 2015 21:39:03 +0900 Message-ID: <6d6f7bd7a906a79bacf8e622d348efcf@admin.virtall.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-kernel@vger.kernel.org Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Got this after stopping a RAID-1 array: [ 626.694737] md: md3 still in use. [ 626.694946] md: delaying resync of md3 until md2 has finished (they share one or more physical units) [ 628.256210] md3: detected capacity change from 3888444473344 to 0 [ 628.256372] md: md3 stopped. [ 628.256383] md: unbind [ 628.274852] md: export_rdev(sdb4) [ 628.274909] md: unbind [ 628.282856] md: export_rdev(sda4) [ 628.283246] ------------[ cut here ]------------ [ 628.283258] WARNING: CPU: 3 PID: 249 at /home/kernel/COD/linux/mm/backing-dev.c:372 bdi_unregister+0x36/0x40() [ 628.283261] Modules linked in: intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper eeepc_wmi asus_wmi ppdev sparse_keymap parport_pc cryptd video shpchp 8250_fintek lpc_ich lp tpm_infineon wmi mac_hid parport serio_raw btrfs pata_acpi raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid1 ahci r8169 libahci raid0 mii pata_via multipath linear [ 628.283320] CPU: 3 PID: 249 Comm: kworker/3:1 Not tainted 4.0.5-040005-generic #201506061639 [ 628.283322] Hardware name: System manufacturer System Product Name/P8H67-M PRO, BIOS 3904 04/27/2013 [ 628.283328] Workqueue: md_misc mddev_delayed_delete [ 628.283341] 0000000000000174 ffff88040867bca8 ffffffff817e4a5d 0000000000000007 [ 628.283347] 0000000000000000 ffff88040867bce8 ffffffff81079227 ffffffff81adc895 [ 628.283352] ffff880409197c00 0000000000000000 0000000000000000 ffff88041f2da900 [ 628.283365] Call Trace: [ 628.283374] [] dump_stack+0x45/0x57 [ 628.283381] [] warn_slowpath_common+0x97/0xe0 [ 628.283386] [] warn_slowpath_null+0x1a/0x20 [ 628.283390] [] bdi_unregister+0x36/0x40 [ 628.283397] [] del_gendisk+0x108/0x260 [ 628.283402] [] md_free+0x4c/0x70 [ 628.283408] [] kobject_cleanup+0x82/0x1c0 [ 628.283413] [] kobject_put+0x30/0x70 [ 628.283417] [] mddev_delayed_delete+0x34/0x40 [ 628.283422] [] process_one_work+0x144/0x490 [ 628.283426] [] worker_thread+0x11e/0x450 [ 628.283431] [] ? create_worker+0x1f0/0x1f0 [ 628.283436] [] kthread+0xc9/0xe0 [ 628.283442] [] ? flush_kthread_worker+0x90/0x90 [ 628.283448] [] ret_from_fork+0x58/0x90 [ 628.283453] [] ? flush_kthread_worker+0x90/0x90 [ 628.283457] ---[ end trace 2c187f15cc11aca4 ]--- -- Tomasz Chmielewski http://wpkg.org