I removed the mount options "compressed" and booted into recovery mode performing an filesystem check. now my problem is gone. I'll wait a few more 3.12 rcs, and will then try with compression re-enabled.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1237833 Title: Process freezes during IO on btrfs Status in “linux” package in Ubuntu: Incomplete Bug description: On a quite clean installation, I'm using btrfs with compression turned on. during a build, it seemed the build process stopped. dmesg showed [ 221.080504] warning: `VirtualBox' uses 32-bit capabilities (legacy support in use) [12161.785213] general protection fault: 0000 [#1] SMP [12161.785241] Modules linked in: pci_stub vboxpci(OF) vboxnetadp(OF) vboxnetflt(OF) vboxdrv(OF) snd_usb_audio snd_usbmidi_lib usb_storage(F) parport_pc(F) ppdev(F) bnep rfcomm bluetooth binfmt_misc(F) hid_generic usbhid x86_pkg_temp_thermal intel_powerclamp hid coretemp kvm_intel(F) kvm(F) crct10dif_pclmul(F) crc32_pclmul(F) ghash_clmulni_intel(F) aesni_intel(F) aes_x86_64(F) lrw(F) gf128mul(F) glue_helper(F) ablk_helper(F) cryptd(F) snd_hda_codec_hdmi dcdbas snd_hda_codec_realtek snd_hda_intel microcode(F) snd_hda_codec snd_hwdep(F) nls_iso8859_1(F) serio_raw(F) snd_pcm(F) snd_page_alloc(F) snd_seq_midi(F) snd_seq_midi_event(F) lpc_ich snd_rawmidi(F) snd_seq(F) snd_seq_device(F) snd_timer(F) tpm_tis snd(F) mac_hid mei_me soundcore(F) mei ext2(F) lp(F) parport(F) btrfs(F) xor(F) zlib_deflate(F) raid6_pq(F) libcrc32c(F) radeon i2c_algo_bit ttm drm_kms_helper drm ahci(F) libahci(F) e1000e(F) ptp(F) pps_core(F) video(F) [12161.785496] CPU: 2 PID: 22490 Comm: java Tainted: GF O 3.11.0-11-generic #17-Ubuntu [12161.785516] Hardware name: Dell Inc. OptiPlex 7010/0GY6Y8, BIOS A15 08/12/2013 [12161.785534] task: ffff880402141770 ti: ffff88003f9b6000 task.ti: ffff88003f9b6000 [12161.785551] RIP: 0010:[<ffffffff813690a6>] [<ffffffff813690a6>] memcpy+0x6/0x110 [12161.785572] RSP: 0018:ffff88003f9b7968 EFLAGS: 00010207 [12161.785585] RAX: ffff880255fad021 RBX: 000000000000000a RCX: 000000000000000a [12161.785601] RDX: 000000000000000a RSI: 0005080000000000 RDI: ffff880255fad021 [12161.785617] RBP: ffff88003f9b79a0 R08: 0000000000001000 R09: ffff880255fad000 [12161.785633] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8802a47a19d0 [12161.785649] R13: 0000160000000000 R14: ffff880255fad02b R15: 000000000000000a [12161.785666] FS: 00002b88695a9700(0000) GS:ffff88041dc80000(0000) knlGS:0000000000000000 [12161.785685] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [12161.785698] CR2: 0000000703266000 CR3: 000000015d79b000 CR4: 00000000001427e0 [12161.785715] Stack: [12161.785720] ffffffffa02b9d4c 0000000000001000 ffff880401db0800 0000000000000000 [12161.785739] ffff88040147c000 ffff880286faed20 ffff8802d96b2980 ffff88003f9b7a60 [12161.785758] ffffffffa029e3b6 0000000000000000 0000000000000f65 00000000ffffffff [12161.785781] Call Trace: [12161.785811] [<ffffffffa02b9d4c>] ? read_extent_buffer+0xbc/0x110 [btrfs] [12161.785837] [<ffffffffa029e3b6>] btrfs_get_extent+0x906/0x9b0 [btrfs] [12161.785859] [<ffffffffa02b704e>] __extent_read_full_page+0x2ee/0x710 [btrfs] [12161.785877] [<ffffffff8119c79a>] ? __mem_cgroup_commit_charge+0x9a/0x380 [12161.785899] [<ffffffffa029dab0>] ? btrfs_real_readdir+0x5c0/0x5c0 [btrfs] [12161.785926] [<ffffffff8115b873>] ? __inc_zone_page_state+0x33/0x40 [12161.785951] [<ffffffffa029dab0>] ? btrfs_real_readdir+0x5c0/0x5c0 [btrfs] [12161.785973] [<ffffffffa02b8465>] extent_readpages+0x1a5/0x210 [btrfs] [12161.785990] [<ffffffff81183969>] ? alloc_pages_current+0xa9/0x160 [12161.786010] [<ffffffffa029ba5f>] btrfs_readpages+0x1f/0x30 [btrfs] [12161.786026] [<ffffffff8114a888>] __do_page_cache_readahead+0x1a8/0x240 [12161.786043] [<ffffffff8114ad96>] ondemand_readahead+0x126/0x250 [12161.786058] [<ffffffff81316e33>] ? apparmor_file_alloc_security+0x23/0x40 [12161.786075] [<ffffffff8114aef3>] page_cache_sync_readahead+0x33/0x50 [12161.786090] [<ffffffff811406a5>] generic_file_aio_read+0x4b5/0x700 [12161.786106] [<ffffffff811a64e0>] do_sync_read+0x80/0xb0 [12161.786119] [<ffffffff811a6b3e>] vfs_read+0x9e/0x170 [12161.786131] [<ffffffff811a7669>] SyS_read+0x49/0xa0 [12161.786145] [<ffffffff817029dd>] system_call_fastpath+0x1a/0x1f [12161.786159] Code: 43 58 48 2b 43 50 88 43 4e 5b 5d c3 66 0f 1f 84 00 00 00 00 00 e8 fb fb ff ff eb e2 90 90 90 90 90 90 90 90 90 48 89 f8 48 89 d1 <f3> a4 c3 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 20 4c 8b 06 4c 8b [12161.786238] RIP [<ffffffff813690a6>] memcpy+0x6/0x110 [12161.786253] RSP <ffff88003f9b7968> [12161.793297] ---[ end trace ba94e36a29af0444 ]--- any hints? should i turn compression off? ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: linux-image (not installed) ProcVersionSignature: Ubuntu 3.11.0-11.17-generic 3.11.3 Uname: Linux 3.11.0-11-generic x86_64 ApportVersion: 2.12.5-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: juergen 2279 F.... pulseaudio /dev/snd/controlC1: juergen 2279 F.... pulseaudio /dev/snd/controlC0: juergen 2279 F.... pulseaudio /dev/snd/pcmC0D0p: juergen 2279 F...m pulseaudio Date: Thu Oct 10 10:30:14 2013 HibernationDevice: RESUME=UUID=d9c05c0f-8e3c-4690-9f47-9ac8625758ff InstallationDate: Installed on 2013-10-04 (5 days ago) InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Beta amd64 (20131003) IwConfig: vboxnet0 no wireless extensions. eth0 no wireless extensions. lo no wireless extensions. MachineType: Dell Inc. OptiPlex 7010 MarkForUpload: True ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.11.0-11-generic.efi.signed root=UUID=8e6dea65-9ed5-49b1-b46a-04de969952b1 ro rootflags=subvol=@ quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.11.0-11-generic N/A linux-backports-modules-3.11.0-11-generic N/A linux-firmware 1.116 RfKill: SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/12/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A15 dmi.board.name: 0GY6Y8 dmi.board.vendor: Dell Inc. dmi.board.version: A01 dmi.chassis.type: 6 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA15:bd08/12/2013:svnDellInc.:pnOptiPlex7010:pvr01:rvnDellInc.:rn0GY6Y8:rvrA01:cvnDellInc.:ct6:cvr: dmi.product.name: OptiPlex 7010 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. 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