FYI, we noticed the following commit: commit: c3b004460d77bf3f980d877be539016f2df4df12 ("quota: Remove dqonoff_mutex") https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master in testcase: xfstests with following parameters: disk: 4HDD fs: ext4 test: generic-quick2 test-description: xfstests is a regression test suite for xfs and other files ystems. test-url: git://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git on test machine: 4 threads Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz with 6G memory caused below changes: +------------------------------------------------------------------+------------+------------+ | | 5f530de63c | c3b004460d | +------------------------------------------------------------------+------------+------------+ | boot_successes | 3 | 0 | | boot_failures | 3 | 4 | | WARNING:at_fs/sysfs/dir.c:#sysfs_warn_dup | 1 | 1 | | calltrace:parport_pc_init | 1 | 1 | | calltrace:SyS_finit_module | 1 | 1 | | WARNING:at_lib/kobject.c:#kobject_add_internal | 1 | 1 | | invoked_oom-killer:gfp_mask=0x | 2 | | | Mem-Info | 2 | | | Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 2 | | | WARNING:at_fs/quota/dquot.c:#dquot_disable | 0 | 4 | | calltrace:SyS_mount | 0 | 4 | +------------------------------------------------------------------+------------+------------+ [ 512.326475] EXT4-fs (sda8): re-mounted. Opts: (null) [ 512.337566] EXT4-fs (sda8): re-mounted. Opts: (null) [ 512.521234] ------------[ cut here ]------------ [ 512.527497] WARNING: CPU: 3 PID: 12705 at fs/quota/dquot.c:2188 dquot_disable+0x5ee/0x7a0 [ 512.538612] Modules linked in: dm_flakey dm_mod rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver netconsole btrfs xor raid6_pq sd_mod sg snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic ata_generic intel_rapl x86_pkg_temp_thermal coretemp kvm_intel i915 kvm irqbypass drm_kms_helper syscopyarea crct10dif_pclmul sysfillrect pata_acpi crc32_pclmul eeepc_wmi crc32c_intel sysimgblt ghash_clmulni_intel asus_wmi fb_sys_fops sparse_keymap snd_hda_intel ppdev rfkill aesni_intel snd_hda_codec ata_piix pata_via lrw gf128mul glue_helper ablk_helper cryptd pcspkr snd_hda_core snd_hwdep snd_pcm snd_timer snd serio_raw soundcore libata drm shpchp wmi parport_pc parport tpm_infineon video ip_tables [ 512.609615] CPU: 3 PID: 12705 Comm: mount Tainted: G W 4.9.0-rc6-00007-gc3b0044 #1 [ 512.619523] Hardware name: System manufacturer System Product Name/P8H67-M PRO, BIOS 1002 04/01/2011 [ 512.629870] ffffc9000131bc70 ffffffff81465dd9 0000000000000000 0000000000000000 [ 512.638573] ffffc9000131bcb0 ffffffff810803cb 0000088cbd320c18 ffff880158887628 [ 512.647270] 0000000000000000 ffff8801b8344800 ffffffff81ebc490 0000000000000001 [ 512.655953] Call Trace: [ 512.659602] [<ffffffff81465dd9>] dump_stack+0x63/0x8a [ 512.665929] [<ffffffff810803cb>] __warn+0xcb/0xf0 [ 512.671889] [<ffffffff810804bd>] warn_slowpath_null+0x1d/0x20 [ 512.678892] [<ffffffff8127bc8e>] dquot_disable+0x5ee/0x7a0 [ 512.685619] [<ffffffff81183b46>] ? filemap_write_and_wait+0x86/0x90 [ 512.693112] [<ffffffff812c891e>] ext4_remount+0x5ee/0x750 [ 512.699730] [<ffffffff8147c348>] ? find_next_bit+0x18/0x20 [ 512.706416] [<ffffffff81233cb8>] ? mnt_get_writers+0x48/0x60 [ 512.713964] [<ffffffff8121601a>] do_remount_sb+0x6a/0x1f0 [ 512.720538] [<ffffffff81236c5e>] do_mount+0x6fe/0xc70 [ 512.726741] [<ffffffff812374d3>] SyS_mount+0x83/0xd0 [ 512.732867] [<ffffffff81956377>] entry_SYSCALL_64_fastpath+0x1a/0xa9 [ 512.740383] ---[ end trace 2632ee5268b2c9bc ]--- To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml Thanks, Xiaolong