I used 3.1.0-rc2+ kernel for some weeks before without any dmesg warnings. I've decided to enable autodegrag feature for my btrfs / today and got warning in $SUBJ.
It's an: > static void iput_final(struct inode *inode) > ... > WARN_ON(inode->i_state & I_NEW); Looks scary. Tried latest mainline kernel and got the same warning. The issue does not seem to appear at once. How do I reproduce it: - boot to the kernel - start Xorg - run liferea and firefox at once (parallel or just heavy write load?) - get warnings in dmesg (a ton of them): Aug 26 23:07:21 sf kernel: [ 204.268669] ------------[ cut here ]------------ Aug 26 23:07:21 sf kernel: [ 204.268685] WARNING: at fs/inode.c:1315 iput+0x20b/0x210() Aug 26 23:07:21 sf kernel: [ 204.268689] Hardware name: HP Compaq 2510p Notebook PC Aug 26 23:07:21 sf kernel: [ 204.268692] Modules linked in: ext2 loop kvm_intel kvm fuse scsi_wait_scan usb_storage tun sdhci_ pci yenta_socket sdhci pcmcia_core thermal mmc_core iwl4965 iwl_legacy mac80211 pcmcia_rsrc ac fan processor cfg80211 e1000e sn d_hda_codec_analog rfkill container battery i915 drm_kms_helper drm snd_hda_intel i2c_algo_bit snd_hda_codec button snd_hwdep Aug 26 23:07:21 sf kernel: [ 204.268753] Pid: 715, comm: btrfs-cleaner Tainted: G W 3.1.0-rc3-00202-g96d185c #138 Aug 26 23:07:21 sf kernel: [ 204.268758] Call Trace: Aug 26 23:07:21 sf kernel: [ 204.268769] [<ffffffff8103e7ba>] warn_slowpath_common+0x7a/0xb0 Aug 26 23:07:21 sf kernel: [ 204.268776] [<ffffffff8103e805>] warn_slowpath_null+0x15/0x20 Aug 26 23:07:21 sf kernel: [ 204.268781] [<ffffffff810eafbb>] iput+0x20b/0x210 Aug 26 23:07:21 sf kernel: [ 204.268789] [<ffffffff811b990b>] btrfs_iget+0x1eb/0x4a0 Aug 26 23:07:21 sf kernel: [ 204.268797] [<ffffffff811c3ce6>] btrfs_run_defrag_inodes+0x136/0x210 Aug 26 23:07:21 sf kernel: [ 204.268803] [<ffffffff811ad76f>] cleaner_kthread+0x17f/0x1a0 Aug 26 23:07:21 sf kernel: [ 204.268810] [<ffffffff81035b7d>] ? sub_preempt_count+0x9d/0xd0 Aug 26 23:07:21 sf kernel: [ 204.268816] [<ffffffff811ad5f0>] ? transaction_kthread+0x280/0x280 Aug 26 23:07:21 sf kernel: [ 204.268822] [<ffffffff8105b056>] kthread+0x96/0xa0 Aug 26 23:07:21 sf kernel: [ 204.268830] [<ffffffff81433914>] kernel_thread_helper+0x4/0x10 Aug 26 23:07:21 sf kernel: [ 204.268836] [<ffffffff8105afc0>] ? kthread_worker_fn+0x190/0x190 Aug 26 23:07:21 sf kernel: [ 204.268842] [<ffffffff81433910>] ? gs_change+0xb/0xb Aug 26 23:07:21 sf kernel: [ 204.268846] ---[ end trace 495191005b4af701 ]--- Thanks! -- Sergei
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