On testday we found: https://bugzilla.redhat.com/show_bug.cgi?id=1018615 which have dmesg after sysrq-t (also have some lines down). We setted cache_mode to writeback, mounted to foldear and started copy files to mounted bcache folder. It was copied some % and stayed. We running 3.11.4 kernel, which have fix for flushing data. [ 1550.135293] BUG: unable to handle kernel NULL pointer dereference at 000000000000006c [ 1550.135335] IP: [<ffffffffa04cc659>] bch_insert_data+0x19/0x30 [bcache] [ 1550.135378] PGD 1eb80f067 PUD 1dd330067 PMD 0 [ 1550.135401] Oops: 0002 [#1] SMP [ 1550.135417] Modules linked in: nf_conntrack_netbios_ns nf_conntrack_broadcast ipt_MASQUERADE joydev ip6table_mangle ip6table_security ip6table_raw ip6t_REJECT iptable_nat nf_nat_ipv4 iptable_mangle iptable_security iptable_raw bnep nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack bluetooth rfkill ebtable_filter ebtables ip6table_filter ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 nf_nat nf_conntrack ip6_tables binfmt_misc snd_hda_codec_hdmi bcache uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev snd_usb_audio snd_usbmidi_lib media snd_rawmidi kvm_amd kvm microcode serio_raw k10temp snd_hda_codec_realtek edac_core edac_mce_amd snd_hda_intel snd_hda_codec snd_seq sp5100_tco snd_hwdep i2c_piix4 snd_seq_device snd_pcm r8169 mii snd_page_alloc snd_timer snd soundcore shpchp [ 1550.135731] acpi_cpufreq mperf nfsd auth_rpcgss nfs_acl lockd sunrpc nouveau video mxm_wmi i2c_algo_bit ata_generic pata_acpi drm_kms_helper firewire_ohci ttm firewire_core pata_jmicron drm pata_atiixp crc_itu_t i2c_core wmi [ 1550.135838] CPU: 0 PID: 680 Comm: jbd2/bcache0-8 Not tainted 3.11.4-301.fc20.x86_64 #1 [ 1550.135857] Hardware name: Gigabyte Technology Co., Ltd. GA-890GPA-UD3H/GA-890GPA-UD3H, BIOS F4 03/08/2010 [ 1550.135878] task: ffff880221d68f40 ti: ffff880217474000 task.ti: ffff880217474000 [ 1550.135894] RIP: 0010:[<ffffffffa04cc659>] [<ffffffffa04cc659>] bch_insert_data+0x19/0x30 [bcache] [ 1550.135934] RSP: 0018:ffff880217475af0 EFLAGS: 00010246 [ 1550.135948] RAX: 0000000000000000 RBX: ffff880217739e30 RCX: 0000000000000000 [ 1550.135963] RDX: ffff880217739f30 RSI: 0000000000000000 RDI: ffff880217739f30 [ 1550.135978] RBP: ffff880217475af0 R08: 0000000000016f60 R09: 0000000000000000 [ 1550.135993] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88021a960000 [ 1550.136009] R13: ffff8802212a19c0 R14: ffff880217739e90 R15: ffff880217739e30 [ 1550.136026] FS: 00007fafab1a9700(0000) GS:ffff88022fc00000(0000) knlGS:00000000f5fffb40 [ 1550.136043] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 1550.136056] CR2: 000000000000006c CR3: 00000001eb80d000 CR4: 00000000000007f0 [ 1550.136076] Stack: [ 1550.136085] ffff880217475b00 ffffffffa04d92c3 ffff880217475b60 ffffffffa04ccf35 [ 1550.136114] ffff88021a960010 8000000000000000 0000000000440128 8000000000000000 [ 1550.136142] 0000000000440130 ffff88021a960010 ffff8802212a19c0 0000000000000000 [ 1550.136169] Call Trace: [ 1550.136201] [<ffffffffa04d92c3>] closure_queue+0x43/0x50 [bcache] [ 1550.136233] [<ffffffffa04ccf35>] request_write+0x1c5/0x480 [bcache] [ 1550.136265] [<ffffffffa04cd362>] cached_dev_make_request+0x172/0x400 [bcache] [ 1550.136286] [<ffffffff812d41d2>] generic_make_request+0xc2/0x110 [ 1550.136303] [<ffffffff812d4291>] submit_bio+0x71/0x150 [ 1550.136322] [<ffffffff811dc5f6>] ? bio_alloc_bioset+0x196/0x2a0 [ 1550.136340] [<ffffffff811d7733>] _submit_bh+0x143/0x220 [ 1550.136357] [<ffffffff811d7820>] submit_bh+0x10/0x20 [ 1550.136375] [<ffffffff812708d5>] journal_submit_commit_record.isra.11+0x1b5/0x1e0 [ 1550.136395] [<ffffffff81271c00>] jbd2_journal_commit_transaction +0x12b0/0x1a90 [ 1550.136417] [<ffffffff8127630d>] kjournald2+0xbd/0x250 [ 1550.136437] [<ffffffff81089400>] ? wake_up_atomic_t+0x30/0x30 [ 1550.136454] [<ffffffff81276250>] ? commit_timeout+0x10/0x10 [ 1550.136474] [<ffffffff81088640>] kthread+0xc0/0xd0 [ 1550.136490] [<ffffffff81088580>] ? insert_kthread_work+0x40/0x40 [ 1550.136509] [<ffffffff8165726c>] ret_from_fork+0x7c/0xb0 [ 1550.136525] [<ffffffff81088580>] ? insert_kthread_work+0x40/0x40 [ 1550.136539] Code: 00 00 0f 0b 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 48 8d 47 68 55 48 89 47 60 48 89 e5 48 89 47 58 48 8b 47 40 <f0> ff 40 6c e8 3e fb ff ff 5d c3 66 66 66 2e 0f 1f 84 00 00 00 [ 1550.136772] RIP [<ffffffffa04cc659>] bch_insert_data+0x19/0x30 [bcache] [ 1550.136806] RSP <ffff880217475af0> [ 1550.136816] CR2: 000000000000006c [ 1550.142486] ---[ end trace 2360439c2bcfc286 ]--- -- Igor Gnatenko Fedora release 20 (Heisenbug) Linux 3.11.4-301.fc20.x86_64 -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
