From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail1.merlins.org (magic.merlins.org [209.81.13.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 946B637D12F for ; Sun, 12 Apr 2026 20:21:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.81.13.136 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776025314; cv=none; b=MKynU9IVQu7dMq2lg2Nc3aQrjby+h96stanRIWdnBDwiYRmw/QLtatwv38KVrj5N67gtgOI4+uvLlQlUerCXfKPHKVkdX22ds51maF8iKz9gQ62eraW57u1ya/Dg6JfNvC9ZuULgmuTg9hQxRHlRqhQTOIGE7DeH8sk/tJYzXzo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776025314; c=relaxed/simple; bh=4SIBBFPiLKKMKK19ot31tZ+qpZbdNpprOPdfM5h2l9Q=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=mZ5n18lmJTfzlToKrqOfKFeW5y7Pzidc5rpioGj3FM2lEmn1eeBwQlhvRu8ifBmmZUFfN19CPqud9bY+gEJSfz74c2NCBaLadJaRTfChGpgFnkiOPecgJhIcox0MQGx9BJrYiO2kbvvDwmCwwuTmGmQKgN/+QQTkNCu4zkuWc/Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=merlins.org; spf=pass smtp.mailfrom=merlins.org; dkim=pass (2048-bit key) header.d=merlins.org header.i=@merlins.org header.b=rUOcFenT; arc=none smtp.client-ip=209.81.13.136 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=merlins.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=merlins.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=merlins.org header.i=@merlins.org header.b="rUOcFenT" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=merlins.org ; s=20251023; h=In-Reply-To:Content-Transfer-Encoding:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=tmg9xvb5fXPHSouYUTfcPUwWs48UfLyCrHEJHyx0YCg=; b=rUOcFenTRomOER+rfV0j8Ots3f i/94+nzpspBVtuZh6heBlDxwYn5bD0VAIvdBCe5E+POU9EVocHd3JX973gLn16O9k327EeQlrE6qw PGgrumNJyvYzs9JTQt9u+Rbyl6XmDsYXR5Bp5oZWvJ4tgpPGuBzjVs9OeI/+99CB2Kz+Pa9z1yada fReZZCbp41fsXWqWt4/fZoHuyVBAi3BcqVjGsc/DeX2bCxZfUYucyzU8HC14z89BPKt6RQUdYqE+K vRdfIfunFtksV/HC++KmktrHvioBJ19uVLqfaOylULLgs9p50ApQoiEYBl6MU+SK+sDIkO1yrbXbX 62EjbcOA==; Received: from [24.6.49.44] (port=54736 helo=sauron.svh.merlins.org) by mail1.merlins.org with esmtpsa (Cipher TLS1.3:ECDHE_SECP256R1__ECDSA_SECP256R1_SHA256__AES_256_GCM:256) (Exim 4.98.2 #2) id 1wC1JU-00000007qtp-1vHH by authid with srv_auth_plain; Sun, 12 Apr 2026 13:21:48 -0700 Received: from merlin by sauron.svh.merlins.org with local (Exim 4.96) (envelope-from ) id 1wC1JS-003Wkb-2f; Sun, 12 Apr 2026 13:21:46 -0700 Date: Sun, 12 Apr 2026 13:21:46 -0700 From: Marc MERLIN To: linux-btrfs , Boris Burkov , Josef Bacik , QuWenruo , Qu Wenruo , Filipe Manana Cc: Chris Murphy , Zygo Blaxell , Roman Mamedov , To: Su Yue , Su Yue ; Subject: Re: BTRFS discard crash: failed to run delayed ref for logical 15506102321152 num_bytes 16384 type 182 action 2 ref_mod 1: -2 6.11.2) Message-ID: References: Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: X-Sysadmin: BOFH X-URL: http://marc.merlins.org/ X-SA-Exim-Connect-IP: 24.6.49.44 X-SA-Exim-Mail-From: marc@merlins.org One last ditch effort from Gemini: moremagic:~# btrfs rescue zero-log /dev/mapper/crypt_bcache0 Clearing log on /dev/mapper/crypt_bcache0, previous log_root 0, level 0 moremagic:~# mount -o rw,clear_cache,skip_balance /dev/mapper/crypt_bcache0= /mnt/btrfs_bigbackup mount: /mnt/btrfs_bigbackup: fsconfig() failed: No such file or directory. dmesg(1) may have more information after failed mount system call. moremagic:~# mount -wno remount,skip_balance /mnt/btrfs_bigbackup/ ^^^ works, filesystem is still there: Read/write still failing :-/ Gemini says the following, whether it's right or wrong about the details, it would be nice to have a way to btrfs --repair or force cleanup/revert/delete on read-write mount to recover to a working state. Coping 22TB off from r/o FS is pointless, it's an offsite backup, never mind that I have nowhere to copy that too anyway, I really would like to get it back to read/write if there isn't massive corruption, and there does not seem to be. Btrfs operates on a strict "clean up your mess first" policy. Read-Only: The kernel simply reads the B-trees as they currently exist on the disk. It completely ignores the Btrfs "to-do" list (the delayed refs and the aborted relocation tree). Read-Write: The kernel refuses to let you write new data until it finishes the aborted relocation from when the system crashed days ago. It tries to execute that "to-do" list, hits the corrupted Extent Tree/Squota bug (ENOENT), and instantly panics and aborts the mount to prevent further corruption. Because there is no skip_relocation mount option in the Linux kernel, you cannot force this filesystem to mount Read-Write without clearing that broken tree. And because standard tools cannot clear a broken relocation tree offline, the RW mount is effectively bricked. moremagic:~# mount -wno remount,skip_balance /mnt/btrfs_bigbackup/ kernel: usb 2-1: reset SuperSpeed USB device number 3 using xhci-hcd kernel: ------------[ cut here ]------------ kernel: BTRFS: Transaction aborted (error -2) kernel: WARNING: CPU: 1 PID: 325244 at fs/btrfs/extent-tree.c:2996 __btrfs_= free_extent.isra.0+0x13a0/0x14a0 [btrfs] kernel: Modules linked in: dm_crypt dm_mod bcache raid456 async_raid6_recov= async_memcpy async_pq async_xor async_tx xt_MASQUERADE ipt_REJECT nf_rejec= t_ipv4 xt_tcpudp xt_conntrack xt_LOG nf_log_syslog nft_compat nft_chain_nat= nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables rfcomm algif_h= ash algif_skcipher af_alg bnep cp210x brcmfmac_wcc binfmt_misc usbserial hc= i_uart brcmfmac btbcm vc4 snd_soc_hdmi_codec brcmutil bluetooth drm_display= _helper cfg80211 cec drm_dma_helper rpi_hevc_dec ecdh_generic v4l2_mem2mem = ecc snd_soc_core pisp_be videobuf2_dma_contig v3d videobuf2_memops videobuf= 2_v4l2 gpu_sched rfkill videodev drm_shmem_helper snd_compress snd_pcm_dmae= ngine snd_pcm videobuf2_common rp1_pio snd_timer snd drm_kms_helper mc rasp= berrypi_gpiomem rp1_fw sg sch_fq_codel ecryptfs fuse drm drm_panel_orientat= ion_quirks backlight nfnetlink ip_tables x_tables raid1 aes_ce_blk aes_ce_c= ipher ghash_ce gf128mul libaes sha2_ce spidev sha256_arm64 sha1_ce raspberr= ypi_hwmon sha1_generic ahci i2c_brcmstb spi_bcm2835 kernel: md_mod gpio_keys libahci pwm_fan rp1_adc libata rp1_mailbox nvmem_= rmem uio_pdrv_genirq uio btrfs blake2b_generic xor xor_neon raid6_pq zram l= z4_compress ipv6 kernel: CPU: 1 UID: 0 PID: 325244 Comm: mount Tainted: G W = 6.12.47+rpt-rpi-2712 #1 Debian 1:6.12.47-1+rpt1 kernel: Tainted: [W]=3DWARN kernel: Hardware name: Raspberry Pi 5 Model B Rev 1.1 (DT) kernel: pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=3D--) kernel: pc : __btrfs_free_extent.isra.0+0x13a0/0x14a0 [btrfs] kernel: lr : __btrfs_free_extent.isra.0+0x13a0/0x14a0 [btrfs] kernel: sp : ffffc0008a843820 kernel: x29: ffffc0008a8438c0 x28: 0000000000000000 x27: 0000000000002f02 kernel: x26: 000000000000007f x25: ffff80011fbbae60 x24: 0000000000004000 kernel: x23: 0000000000000000 x22: ffff8001033a9068 x21: 0000000000004000 kernel: x20: 00000e1a4bb88000 x19: 00000000fffffffe x18: 0000000000000000 kernel: x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 kernel: x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 kernel: x11: 00000000000000c0 x10: 0000000000001a40 x9 : ffffd06fce4e06c0 kernel: x8 : ffff80011e5a9ea0 x7 : ffffc0008293bc30 x6 : 0000000000000043 kernel: x5 : 0000000000000001 x4 : 0000000000001ab0 x3 : 0000000000000804 kernel: x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff80011e5a8400 kernel: Call trace: kernel: __btrfs_free_extent.isra.0+0x13a0/0x14a0 [btrfs] kernel: __btrfs_run_delayed_refs+0x508/0xec0 [btrfs] kernel: btrfs_run_delayed_refs+0x48/0x198 [btrfs] kernel: btrfs_commit_transaction+0x88/0xe20 [btrfs] kernel: btrfs_recover_relocation+0x55c/0x5d0 [btrfs] kernel: btrfs_start_pre_rw_mount+0x1d4/0x470 [btrfs] kernel: btrfs_reconfigure+0x198/0x6d8 [btrfs] kernel: reconfigure_super+0xc8/0x260 kernel: __arm64_sys_fsconfig+0x510/0x5b8 kernel: invoke_syscall+0x50/0x120 kernel: el0_svc_common.constprop.0+0x48/0xf0 kernel: do_el0_svc+0x24/0x38 kernel: el0_svc+0x30/0xf8 kernel: el0t_64_sync_handler+0x120/0x130 kernel: el0t_64_sync+0x190/0x198 kernel: ---[ end trace 0000000000000000 ]--- kernel: BTRFS: error (device dm-0 state MA) in do_free_extent_accounting:29= 96: errno=3D-2 No such entry kernel: BTRFS error (device dm-0 state EMA): failed to run delayed ref for = logical 15506102321152 num_bytes 16384 type 182 action 2 ref_mod 1: -2 kernel: BTRFS: error (device dm-0 state EMA) in btrfs_run_delayed_refs:2215= : errno=3D-2 No such entry kernel: BTRFS warning (device dm-0 state EMA): failed to recover relocation= : -2 mount: /mnt/btrfs_bigbackup: fsconfig() failed: No such file or directory. dmesg(1) may have more information after failed mount system call. --=20 "A mouse is a device used to point at the xterm you want to type in" - A.S.= R. =20 Home page: http://marc.merlins.org/ | PGP 7F55D5F27AA= F9D08 From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail1.merlins.org (magic.merlins.org [209.81.13.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 378BC34F241 for ; Wed, 15 Apr 2026 05:12:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.81.13.136 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776229964; cv=none; b=ZF0zfZgydrDIAUoJdKsbp5vqyvAcWzvFkih20zhNyr4NZxj437U0jArYaiHdFZsp0r19vK2UaPhYik/szYhhzpYZ6hsYT34KyVasBp03ozc3GLu337SvQuR+OvvOLvKOYhz9iavEJX+DpvWhxx9Lwemex+txkFT+NFX481AHCLU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776229964; c=relaxed/simple; bh=4SIBBFPiLKKMKK19ot31tZ+qpZbdNpprOPdfM5h2l9Q=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=JYd9+roqJiw+zdS4gXZ0rPCA9HSrN2ALB5OrY8zoZL1ENYvoHDes8OoN3oL1OgbnD0LnPfRlLdX5whGg0YhP6Db4vbOgMK3iyuxWDAN/1gE3cbapugWCGrYrAsTALrWwjeL3iNJPnq7CW+wAgRkTIuaSWxiK1I1o8jVXKL3MhJw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=merlins.org; spf=pass smtp.mailfrom=merlins.org; dkim=pass (2048-bit key) header.d=merlins.org header.i=@merlins.org header.b=dkvOAESj; arc=none smtp.client-ip=209.81.13.136 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=merlins.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=merlins.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=merlins.org header.i=@merlins.org header.b="dkvOAESj" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=merlins.org ; s=20251023; h=In-Reply-To:Content-Transfer-Encoding:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Resent-To: Resent-Message-ID:Resent-Date:Resent-From:Sender:Reply-To:Content-ID: Content-Description:Resent-Sender:Resent-Cc:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=tmg9xvb5fXPHSouYUTfcPUwWs48UfLyCrHEJHyx0YCg=; b=dkvOAESj3G5cRfp7rvv7JRH/Vq BgjFC3KWVIwv3D9k+PaWcuPnTM5cOA85w+6M5YLJoIPGalOC+OT3ireFBFmJfd86JPQppIZuGCq/0 hbkECMY1VWlxdqriYlYOgDGBlf+vEag0IG+LptX38GZj1dglzOKqUdvrkggzRO9DCGgsDqIVtR5cn bq414SvrVoorBGk/Jievw20iPFty+uD8XHeTkP+Gg0oP0tgxat9COmHKhit//yMXrKLyIjvJhnZ33 E61qXj9efkpcQlQ3Z3aW7Q5/AWsyYOMGvjiQmcPc+Ex9SFHkCp0A+lZql+dV8Xeca0WKACmtZNUml KmjK/99Q==; Received: from [24.6.49.44] (port=35858 helo=sauron.svh.merlins.org) by mail1.merlins.org with esmtpsa (Cipher TLS1.3:ECDHE_SECP256R1__ECDSA_SECP256R1_SHA256__AES_256_GCM:256) (Exim 4.98.2 #2) id 1wCsYL-00000004AUD-3czo by authid with srv_auth_plain for ; Tue, 14 Apr 2026 22:12:41 -0700 Received: from merlin by sauron.svh.merlins.org with local (Exim 4.96) (envelope-from ) id 1wCsYK-006sZq-1d for linux-btrfs@vger.kernel.org; Tue, 14 Apr 2026 22:12:40 -0700 Resent-From: Marc MERLIN Resent-Date: Tue, 14 Apr 2026 22:12:40 -0700 Resent-Message-ID: Resent-To: linux-btrfs@vger.kernel.org Date: Sun, 12 Apr 2026 13:21:46 -0700 From: Marc MERLIN To: linux-btrfs , Boris Burkov , Josef Bacik , QuWenruo , Qu Wenruo , Filipe Manana Cc: Chris Murphy , Zygo Blaxell , Roman Mamedov , To: Su Yue , Su Yue ; Subject: Re: BTRFS discard crash: failed to run delayed ref for logical 15506102321152 num_bytes 16384 type 182 action 2 ref_mod 1: -2 6.11.2) Message-ID: References: Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: X-Sysadmin: BOFH X-URL: http://marc.merlins.org/ X-SA-Exim-Connect-IP: 24.6.49.44 X-SA-Exim-Mail-From: marc@merlins.org Message-ID: <20260412202146.ut6NvgbK0X9WjeawuKMeD8LDD3d-kItoKDcolpz0xTw@z> One last ditch effort from Gemini: moremagic:~# btrfs rescue zero-log /dev/mapper/crypt_bcache0 Clearing log on /dev/mapper/crypt_bcache0, previous log_root 0, level 0 moremagic:~# mount -o rw,clear_cache,skip_balance /dev/mapper/crypt_bcache0= /mnt/btrfs_bigbackup mount: /mnt/btrfs_bigbackup: fsconfig() failed: No such file or directory. dmesg(1) may have more information after failed mount system call. moremagic:~# mount -wno remount,skip_balance /mnt/btrfs_bigbackup/ ^^^ works, filesystem is still there: Read/write still failing :-/ Gemini says the following, whether it's right or wrong about the details, it would be nice to have a way to btrfs --repair or force cleanup/revert/delete on read-write mount to recover to a working state. Coping 22TB off from r/o FS is pointless, it's an offsite backup, never mind that I have nowhere to copy that too anyway, I really would like to get it back to read/write if there isn't massive corruption, and there does not seem to be. Btrfs operates on a strict "clean up your mess first" policy. Read-Only: The kernel simply reads the B-trees as they currently exist on the disk. It completely ignores the Btrfs "to-do" list (the delayed refs and the aborted relocation tree). Read-Write: The kernel refuses to let you write new data until it finishes the aborted relocation from when the system crashed days ago. It tries to execute that "to-do" list, hits the corrupted Extent Tree/Squota bug (ENOENT), and instantly panics and aborts the mount to prevent further corruption. Because there is no skip_relocation mount option in the Linux kernel, you cannot force this filesystem to mount Read-Write without clearing that broken tree. And because standard tools cannot clear a broken relocation tree offline, the RW mount is effectively bricked. moremagic:~# mount -wno remount,skip_balance /mnt/btrfs_bigbackup/ kernel: usb 2-1: reset SuperSpeed USB device number 3 using xhci-hcd kernel: ------------[ cut here ]------------ kernel: BTRFS: Transaction aborted (error -2) kernel: WARNING: CPU: 1 PID: 325244 at fs/btrfs/extent-tree.c:2996 __btrfs_= free_extent.isra.0+0x13a0/0x14a0 [btrfs] kernel: Modules linked in: dm_crypt dm_mod bcache raid456 async_raid6_recov= async_memcpy async_pq async_xor async_tx xt_MASQUERADE ipt_REJECT nf_rejec= t_ipv4 xt_tcpudp xt_conntrack xt_LOG nf_log_syslog nft_compat nft_chain_nat= nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables rfcomm algif_h= ash algif_skcipher af_alg bnep cp210x brcmfmac_wcc binfmt_misc usbserial hc= i_uart brcmfmac btbcm vc4 snd_soc_hdmi_codec brcmutil bluetooth drm_display= _helper cfg80211 cec drm_dma_helper rpi_hevc_dec ecdh_generic v4l2_mem2mem = ecc snd_soc_core pisp_be videobuf2_dma_contig v3d videobuf2_memops videobuf= 2_v4l2 gpu_sched rfkill videodev drm_shmem_helper snd_compress snd_pcm_dmae= ngine snd_pcm videobuf2_common rp1_pio snd_timer snd drm_kms_helper mc rasp= berrypi_gpiomem rp1_fw sg sch_fq_codel ecryptfs fuse drm drm_panel_orientat= ion_quirks backlight nfnetlink ip_tables x_tables raid1 aes_ce_blk aes_ce_c= ipher ghash_ce gf128mul libaes sha2_ce spidev sha256_arm64 sha1_ce raspberr= ypi_hwmon sha1_generic ahci i2c_brcmstb spi_bcm2835 kernel: md_mod gpio_keys libahci pwm_fan rp1_adc libata rp1_mailbox nvmem_= rmem uio_pdrv_genirq uio btrfs blake2b_generic xor xor_neon raid6_pq zram l= z4_compress ipv6 kernel: CPU: 1 UID: 0 PID: 325244 Comm: mount Tainted: G W = 6.12.47+rpt-rpi-2712 #1 Debian 1:6.12.47-1+rpt1 kernel: Tainted: [W]=3DWARN kernel: Hardware name: Raspberry Pi 5 Model B Rev 1.1 (DT) kernel: pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=3D--) kernel: pc : __btrfs_free_extent.isra.0+0x13a0/0x14a0 [btrfs] kernel: lr : __btrfs_free_extent.isra.0+0x13a0/0x14a0 [btrfs] kernel: sp : ffffc0008a843820 kernel: x29: ffffc0008a8438c0 x28: 0000000000000000 x27: 0000000000002f02 kernel: x26: 000000000000007f x25: ffff80011fbbae60 x24: 0000000000004000 kernel: x23: 0000000000000000 x22: ffff8001033a9068 x21: 0000000000004000 kernel: x20: 00000e1a4bb88000 x19: 00000000fffffffe x18: 0000000000000000 kernel: x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 kernel: x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 kernel: x11: 00000000000000c0 x10: 0000000000001a40 x9 : ffffd06fce4e06c0 kernel: x8 : ffff80011e5a9ea0 x7 : ffffc0008293bc30 x6 : 0000000000000043 kernel: x5 : 0000000000000001 x4 : 0000000000001ab0 x3 : 0000000000000804 kernel: x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff80011e5a8400 kernel: Call trace: kernel: __btrfs_free_extent.isra.0+0x13a0/0x14a0 [btrfs] kernel: __btrfs_run_delayed_refs+0x508/0xec0 [btrfs] kernel: btrfs_run_delayed_refs+0x48/0x198 [btrfs] kernel: btrfs_commit_transaction+0x88/0xe20 [btrfs] kernel: btrfs_recover_relocation+0x55c/0x5d0 [btrfs] kernel: btrfs_start_pre_rw_mount+0x1d4/0x470 [btrfs] kernel: btrfs_reconfigure+0x198/0x6d8 [btrfs] kernel: reconfigure_super+0xc8/0x260 kernel: __arm64_sys_fsconfig+0x510/0x5b8 kernel: invoke_syscall+0x50/0x120 kernel: el0_svc_common.constprop.0+0x48/0xf0 kernel: do_el0_svc+0x24/0x38 kernel: el0_svc+0x30/0xf8 kernel: el0t_64_sync_handler+0x120/0x130 kernel: el0t_64_sync+0x190/0x198 kernel: ---[ end trace 0000000000000000 ]--- kernel: BTRFS: error (device dm-0 state MA) in do_free_extent_accounting:29= 96: errno=3D-2 No such entry kernel: BTRFS error (device dm-0 state EMA): failed to run delayed ref for = logical 15506102321152 num_bytes 16384 type 182 action 2 ref_mod 1: -2 kernel: BTRFS: error (device dm-0 state EMA) in btrfs_run_delayed_refs:2215= : errno=3D-2 No such entry kernel: BTRFS warning (device dm-0 state EMA): failed to recover relocation= : -2 mount: /mnt/btrfs_bigbackup: fsconfig() failed: No such file or directory. dmesg(1) may have more information after failed mount system call. --=20 "A mouse is a device used to point at the xterm you want to type in" - A.S.= R. =20 Home page: http://marc.merlins.org/ | PGP 7F55D5F27AA= F9D08