Hi, I am using btrfs at home on my root system because I want to be able to send useful bug reports when things go wrong. And I have 3 questions: What kernel should I be using? And how do I create good bug reports? Is a "Call Trace" that I find in /var/log/messages enough, or do I need to install some debug packages and run some tools? Can someone also tell me how to find device error counts? (like what ZFS's zpool status shows under the "read" and "write" columns, not scrub/checksums on data, but the device errors) I am using version 3.4.0-rc7-1-default which I got using openSUSE KOTD. Is that a good choice? It would be convenient to use these openSUSE repositories. Someone in the #btrfs IRC channel told me to use this: git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next.git I managed to crash my system today with a USB stick that is defective. (dd to the direct device hangs and causes it to change device names, eg. from sdb to sdc.) I would like to properly report this so it can be fixed. A bad disk should not take down the system. All I did was create a btrfs fs, dd a file onto the disk which caused an Input/Output error, and then try to run "btrfs scrub start" and "btrfs filesystem show" to try to find an error count like you would find in a "zpool status" using the ZFS file system. Here are 50 lines from /var/log/messages, starting with what I assume is the first error. May 17 10:30:01 peterlaptop kernel: [ 3119.537086] lost page write due to I/O error on sdb1 May 17 10:30:01 peterlaptop kernel: [ 3119.537100] lost page write due to I/O error on sdb1 May 17 10:30:01 peterlaptop kernel: [ 3119.537105] BTRFS error (device sdb1) in write_all_supers:2890: IO failure (1 errors while writing supers) May 17 10:30:01 peterlaptop kernel: [ 3119.537108] btrfs: commit super ret -5 May 17 10:30:01 peterlaptop kernel: [ 3119.542081] ------------[ cut here ]------------ May 17 10:30:01 peterlaptop kernel: [ 3119.542135] WARNING: at /home/abuild/rpmbuild/BUILD/kernel-default-3.4.rc7/linux-3.4-rc7/fs/btrfs/extent-tree.c:124 btrfs_put_block_group+0x5a/0x60 [btrfs]() May 17 10:30:01 peterlaptop kernel: [ 3119.542139] Hardware name: HP Compaq nx8220 (PY522ET#ABD) May 17 10:30:01 peterlaptop kernel: [ 3119.542141] Modules linked in: loop nls_iso8859_1 nls_cp437 reiserfs minix hfs vfat fat usb_storage uas xt_tcpudp xt_pkttype xt_LOG xt_limit af_packet ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_raw xt_NOTRACK ipt_REJECT iptable_raw iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4 nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack ip6table_filter ip6_tables x_tables cpufreq_conservative cpufreq_userspace cpufreq_powersave acpi_cpufreq mperf fuse snd_intel8x0m snd_intel8x0 snd_ac97_codec sr_mod sg ppdev firewire_ohci iTCO_wdt iTCO_vendor_support ac97_bus snd_pcm ipw2200 snd_timer firewire_core cdrom hp_wmi tifm_7xx1 tifm_core parport_pc parport joydev pcmcia snd sparse_keymap libipw tg3 pcspkr irda wmi sdhci_pci serio_raw yenta_socket pcmcia_rsrc pcmcia_core sdhci microcode mmc_core video cfg80211 rfkill button ac soundcore crc_ccitt container battery snd_page_alloc lib80211 crc_itu_t autofs4 btrfs zlib_deflate usbhid hid a May 17 10:30:01 peterlaptop kernel: ta_generic uhci_hcd ehci_hcd ata_piix ahci libahci radeon ttm drm_kms_helper libata rtc_cmos fan thermal drm i2c_algo_bit i2c_core processor thermal_sys hwmon usbcore usb_common May 17 10:30:01 peterlaptop kernel: [ 3119.542221] Pid: 7558, comm: umount Tainted: G W 3.4.0-rc7-1-default #1 May 17 10:30:01 peterlaptop kernel: [ 3119.542224] Call Trace: May 17 10:30:01 peterlaptop kernel: [ 3119.542239] [<c0205359>] try_stack_unwind+0x199/0x1b0 May 17 10:30:01 peterlaptop kernel: [ 3119.542248] [<c02041d7>] dump_trace+0x47/0xf0 May 17 10:30:01 peterlaptop kernel: [ 3119.542253] [<c02053bb>] show_trace_log_lvl+0x4b/0x60 May 17 10:30:01 peterlaptop kernel: [ 3119.542258] [<c02053e8>] show_trace+0x18/0x20 May 17 10:30:01 peterlaptop kernel: [ 3119.542264] [<c06952f1>] dump_stack+0x6d/0x72 May 17 10:30:01 peterlaptop kernel: [ 3119.542271] [<c0231058>] warn_slowpath_common+0x78/0xb0 May 17 10:30:01 peterlaptop kernel: [ 3119.542276] [<c02310ab>] warn_slowpath_null+0x1b/0x20 May 17 10:30:01 peterlaptop kernel: [ 3119.542295] [<f82ab0ba>] btrfs_put_block_group+0x5a/0x60 [btrfs] May 17 10:30:01 peterlaptop kernel: [ 3119.542350] [<f82b4dbe>] btrfs_free_block_groups+0x7e/0x2f0 [btrfs] May 17 10:30:01 peterlaptop kernel: [ 3119.542412] [<f82c02a4>] close_ctree+0x184/0x390 [btrfs] May 17 10:30:01 peterlaptop kernel: [ 3119.542475] [<c03236aa>] generic_shutdown_super+0x4a/0xc0 May 17 10:30:01 peterlaptop kernel: [ 3119.542481] [<c0323799>] kill_anon_super+0x9/0x20 May 17 10:30:01 peterlaptop kernel: [ 3119.542498] [<f829d3ac>] btrfs_kill_super+0xc/0x70 [btrfs] May 17 10:30:01 peterlaptop kernel: [ 3119.542516] [<c0323214>] deactivate_locked_super+0x44/0x70 May 17 10:30:01 peterlaptop kernel: [ 3119.542522] [<c033abd9>] sys_umount+0x69/0x360 May 17 10:30:01 peterlaptop kernel: [ 3119.542526] [<c033aee7>] sys_oldumount+0x17/0x20 May 17 10:30:01 peterlaptop kernel: [ 3119.542532] [<c069fd65>] syscall_call+0x7/0xb May 17 10:30:01 peterlaptop kernel: [ 3119.542540] [<b7678bbd>] 0xb7678bbc May 17 10:30:01 peterlaptop kernel: [ 3119.542542] ---[ end trace 9be3c75618b69fe7 ]--- May 17 10:30:01 peterlaptop kernel: [ 3119.542547] ------------[ cut here ]------------ May 17 10:30:01 peterlaptop kernel: [ 3119.542564] WARNING: at /home/abuild/rpmbuild/BUILD/kernel-default-3.4.rc7/linux-3.4-rc7/fs/btrfs/extent-tree.c:124 btrfs_put_block_group+0x5a/0x60 [btrfs]() May 17 10:30:01 peterlaptop kernel: [ 3119.542567] Hardware name: HP Compaq nx8220 (PY522ET#ABD) May 17 10:30:01 peterlaptop kernel: [ 3119.542569] Modules linked in: loop nls_iso8859_1 nls_cp437 reiserfs minix hfs vfat fat usb_storage uas xt_tcpudp xt_pkttype xt_LOG xt_limit af_packet ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_raw xt_NOTRACK ipt_REJECT iptable_raw iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4 nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack ip6table_filter ip6_tables x_tables cpufreq_conservative cpufreq_userspace cpufreq_powersave acpi_cpufreq mperf fuse snd_intel8x0m snd_intel8x0 snd_ac97_codec sr_mod sg ppdev firewire_ohci iTCO_wdt iTCO_vendor_support ac97_bus snd_pcm ipw2200 snd_timer firewire_core cdrom hp_wmi tifm_7xx1 tifm_core parport_pc parport joydev pcmcia snd sparse_keymap libipw tg3 pcspkr irda wmi sdhci_pci serio_raw yenta_socket pcmcia_rsrc pcmcia_core sdhci microcode mmc_core video cfg80211 rfkill button ac soundcore crc_ccitt container battery snd_page_alloc lib80211 crc_itu_t autofs4 btrfs zlib_deflate usbhid hid a May 17 10:30:01 peterlaptop kernel: ta_generic uhci_hcd ehci_hcd ata_piix ahci libahci radeon ttm drm_kms_helper libata rtc_cmos fan thermal drm i2c_algo_bit i2c_core processor thermal_sys hwmon usbcore usb_common May 17 10:30:01 peterlaptop kernel: [ 3119.542644] Pid: 7558, comm: umount Tainted: G W 3.4.0-rc7-1-default #1 May 17 10:30:01 peterlaptop kernel: [ 3119.542646] Call Trace: May 17 10:30:01 peterlaptop kernel: [ 3119.542650] [<c0205359>] try_stack_unwind+0x199/0x1b0 May 17 10:30:01 peterlaptop kernel: [ 3119.542657] [<c02041d7>] dump_trace+0x47/0xf0 May 17 10:30:01 peterlaptop kernel: [ 3119.542661] [<c02053bb>] show_trace_log_lvl+0x4b/0x60 May 17 10:30:01 peterlaptop kernel: [ 3119.542666] [<c02053e8>] show_trace+0x18/0x20 May 17 10:30:01 peterlaptop kernel: [ 3119.542670] [<c06952f1>] dump_stack+0x6d/0x72 May 17 10:30:01 peterlaptop kernel: [ 3119.542675] [<c0231058>] warn_slowpath_common+0x78/0xb0 May 17 10:30:01 peterlaptop kernel: [ 3119.542679] [<c02310ab>] warn_slowpath_null+0x1b/0x20 May 17 10:30:01 peterlaptop kernel: [ 3119.542698] [<f82ab0ba>] btrfs_put_block_group+0x5a/0x60 [btrfs] May 17 10:30:01 peterlaptop kernel: [ 3119.542748] [<f82b4dbe>] btrfs_free_block_groups+0x7e/0x2f0 [btrfs] May 17 10:30:01 peterlaptop kernel: [ 3119.542809] [<f82c02a4>] close_ctree+0x184/0x390 [btrfs] May 17 10:30:01 peterlaptop kernel: [ 3119.542871] [<c03236aa>] generic_shutdown_super+0x4a/0xc0 May 17 10:30:01 peterlaptop kernel: [ 3119.542876] [<c0323799>] kill_anon_super+0x9/0x20 May 17 10:30:01 peterlaptop kernel: [ 3119.542893] [<f829d3ac>] btrfs_kill_super+0xc/0x70 [btrfs] May 17 10:30:01 peterlaptop kernel: [ 3119.542910] [<c0323214>] deactivate_locked_super+0x44/0x70 Thanks, Peter -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
