I have no idea if this is a problem or not so I''m reporting it in case it is. Non-critical throway test system. Warning occurs with kernel 3.12.0-0.rc3.git0.1.fc21.x86_64 1. Fedora 20 alpha installation, with boot root home on subvolumes. Autodefrag is not used by the installer. The file system is created with and system installed with: kernel-3.11.0-300.fc20.x86_64 btrfs-progs-0.20.rc1.20130917git194aa4a-1.fc20.x86_64 2. Before rebooting, changed /etc/fstab to include autodefrag. Reboot, which includes switch to kernel 3.12.0-0.rc3.git0.1.fc21.x86_64 Mount state is rw,relatime,seclabel,space_cache,autodefrag dmesg reports [ 15.480651] btrfs: device label fedora_f20s devid 1 transid 47 /dev/sda5 [ 15.491746] btrfs: device label fedora_f20s devid 1 transid 47 /dev/sda5 [ 15.571815] btrfs: device label fedora_f20s devid 1 transid 47 /dev/sda5 3. yum update, ~750MB of updates Warning occurs during the updating. This is the complete segment from dmesg. [13167.297795] SELinux: initialized (dev binfmt_misc, type binfmt_misc), uses genfs_contexts [13363.105253] btrfs: device label fedora_f20s devid 1 transid 199 /dev/sda5 [13471.491365] BTRFS debug (device sda5): unlinked 5 orphans [13478.878836] BTRFS debug (device sda5): unlinked 360 orphans [13591.757985] ------------[ cut here ]------------ [13591.758009] WARNING: CPU: 1 PID: 8600 at fs/btrfs/inode.c:7998 btrfs_rename+0x157/0x730 [btrfs]() [13591.758043] Modules linked in: binfmt_misc fuse ebtable_nat nf_conntrack_netbios_ns nf_conntrack_broadcast ipt_MASQUERADE ip6table_nat nf_nat_ipv6 ip6table_mangle ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 iptable_nat nf_nat_ipv4 nf_nat iptable_mangle nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ebtable_filter ebtables ip6table_filter ip6_tables bnep nls_utf8 hfsplus coretemp kvm_intel kvm b43 snd_hda_codec_realtek snd_hda_intel snd_hda_codec bcma snd_hwdep snd_seq snd_seq_device microcode mac80211 cfg80211 snd_pcm iTCO_wdt iTCO_vendor_support snd_page_alloc uvcvideo snd_timer applesmc ssb snd input_polldev btusb i2c_i801 videobuf2_vmalloc videobuf2_memops videobuf2_core lpc_ich bcm5974 mmc_core soundcore sky2 bluetooth hid_appleir videodev media mfd_core apple_bl rfkill shpchp acpi_cpufreq [13591.758081] nfsd auth_rpcgss nfs_acl lockd sunrpc btrfs libcrc32c xor raid6_pq nouveau mxm_wmi wmi i2c_algo_bit drm_kms_helper firewire_ohci ata_generic ttm pata_acpi firewire_core crc_itu_t drm i2c_core video [13591.758099] CPU: 1 PID: 8600 Comm: mv Tainted: G W 3.12.0-0.rc3.git0.1.fc21.x86_64 #1 [13591.758101] Hardware name: Apple Inc. MacBookPro4,1/Mac-F42C89C8, BIOS MBP41.88Z.00C1.B03.0802271651 02/27/08 [13591.758103] 0000000000000009 ffff88000bd19c78 ffffffff8165e6e4 0000000000000000 [13591.758106] ffff88000bd19cb0 ffffffff810683ed ffff88000c9f3a40 0000000000000100 [13591.758109] 0000000000000000 ffff88000c9c9e08 ffff88000c9f3a01 ffff88000bd19cc0 [13591.758111] Call Trace: [13591.758119] [<ffffffff8165e6e4>] dump_stack+0x45/0x56 [13591.758124] [<ffffffff810683ed>] warn_slowpath_common+0x7d/0xa0 [13591.758126] [<ffffffff810684ca>] warn_slowpath_null+0x1a/0x20 [13591.758140] [<ffffffffa0226287>] btrfs_rename+0x157/0x730 [btrfs] [13591.758144] [<ffffffff811bacfa>] vfs_rename+0x33a/0x470 [13591.758146] [<ffffffff811bb1b9>] SYSC_renameat+0x389/0x430 [13591.758149] [<ffffffff811bd351>] ? user_path_at+0x11/0x20 [13591.758153] [<ffffffff811b1d62>] ? SYSC_newlstat+0x22/0x40 [13591.758155] [<ffffffff811bdc0e>] SyS_renameat+0xe/0x10 [13591.758157] [<ffffffff811bdc2b>] SyS_rename+0x1b/0x20 [13591.758162] [<ffffffff8166d6a9>] system_call_fastpath+0x16/0x1b [13591.758163] ---[ end trace 36ebd831d74ca650 ]--- [13616.544255] ------------[ cut here ]------------ [13616.544291] WARNING: CPU: 1 PID: 8608 at fs/btrfs/inode.c:7998 btrfs_rename+0x157/0x730 [btrfs]() [13616.544293] Modules linked in: binfmt_misc fuse ebtable_nat nf_conntrack_netbios_ns nf_conntrack_broadcast ipt_MASQUERADE ip6table_nat nf_nat_ipv6 ip6table_mangle ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 iptable_nat nf_nat_ipv4 nf_nat iptable_mangle nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ebtable_filter ebtables ip6table_filter ip6_tables bnep nls_utf8 hfsplus coretemp kvm_intel kvm b43 snd_hda_codec_realtek snd_hda_intel snd_hda_codec bcma snd_hwdep snd_seq snd_seq_device microcode mac80211 cfg80211 snd_pcm iTCO_wdt iTCO_vendor_support snd_page_alloc uvcvideo snd_timer applesmc ssb snd input_polldev btusb i2c_i801 videobuf2_vmalloc videobuf2_memops videobuf2_core lpc_ich bcm5974 mmc_core soundcore sky2 bluetooth hid_appleir videodev media mfd_core apple_bl rfkill shpchp acpi_cpufreq [13616.544330] nfsd auth_rpcgss nfs_acl lockd sunrpc btrfs libcrc32c xor raid6_pq nouveau mxm_wmi wmi i2c_algo_bit drm_kms_helper firewire_ohci ata_generic ttm pata_acpi firewire_core crc_itu_t drm i2c_core video [13616.544347] CPU: 1 PID: 8608 Comm: mv Tainted: G W 3.12.0-0.rc3.git0.1.fc21.x86_64 #1 [13616.544349] Hardware name: Apple Inc. MacBookPro4,1/Mac-F42C89C8, BIOS MBP41.88Z.00C1.B03.0802271651 02/27/08 [13616.544351] 0000000000000009 ffff88000bd63c78 ffffffff8165e6e4 0000000000000000 [13616.544354] ffff88000bd63cb0 ffffffff810683ed ffff88000c9f3a40 0000000000000100 [13616.544356] 0000000000000000 ffff88000c9c9e08 ffff88000c9f3a01 ffff88000bd63cc0 [13616.544359] Call Trace: [13616.544366] [<ffffffff8165e6e4>] dump_stack+0x45/0x56 [13616.544370] [<ffffffff810683ed>] warn_slowpath_common+0x7d/0xa0 [13616.544373] [<ffffffff810684ca>] warn_slowpath_null+0x1a/0x20 [13616.544387] [<ffffffffa0226287>] btrfs_rename+0x157/0x730 [btrfs] [13616.544390] [<ffffffff811bacfa>] vfs_rename+0x33a/0x470 [13616.544393] [<ffffffff811bb1b9>] SYSC_renameat+0x389/0x430 [13616.544396] [<ffffffff811bd351>] ? user_path_at+0x11/0x20 [13616.544399] [<ffffffff811b1d62>] ? SYSC_newlstat+0x22/0x40 [13616.544402] [<ffffffff811bdc0e>] SyS_renameat+0xe/0x10 [13616.544404] [<ffffffff811bdc2b>] SyS_rename+0x1b/0x20 [13616.544407] [<ffffffff8166d6a9>] system_call_fastpath+0x16/0x1b [13616.544409] ---[ end trace 36ebd831d74ca651 ]--- [13720.422719] BTRFS debug (device sda5): unlinked 360 orphans [13727.309658] BTRFS debug (device sda5): unlinked 5 orphans Chris Murphy-- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html