tbsaunde
commented
9 years ago So, I didn't look closely enough at dmesgg. Turns out this is a bug in linux introduced sometime before 4.0.2 and not yet fixed in master. So feel free to close if your not interested in trying to work around it whatever exactly it is. The full dmesg output for anyone interested is:
[ 490.073615] ------------[ cut here ]------------
[ 490.073636] kernel BUG at mm/memory.c:3137!
[ 490.073648] invalid opcode: 0000 [#1] SMP
[ 490.073665] Modules linked in: ctr ccm bnep cpufreq_conservative cpufreq_powersave cpufreq_userspace cpufreq_stats binfmt_misc uinput nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc loop parport_pc ppdev lp parport x86_pkg_temp_thermal intel_powerclamp intel_rapl iosf_mbi arc4 iwldvm coretemp kvm_intel kvm snd_hda_codec_hdmi mac80211 i915 snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_controller btusb btbcm snd_hda_codec btintel iwlwifi uvcvideo joydev bluetooth snd_hda_core snd_hwdep snd_pcm iTCO_wdt drm_kms_helper iTCO_vendor_support crct10dif_pclmul crc32_pclmul cfg80211 drm psmouse videobuf2_vmalloc thinkpad_acpi videobuf2_memops videobuf2_core ghash_clmulni_intel v4l2_common evdev snd_timer serio_raw nvram videodev aesni_intel aes_x86_64 lrw gf128mul glue_helper
[ 490.073980] snd media ablk_helper pcspkr cryptd tpm_tis battery wmi tpm shpchp ac soundcore rfkill i2c_i801 i2c_algo_bit i2c_core processor video lpc_ich mfd_core button mei_me mei ext4 crc16 mbcache jbd2 dm_mod sg sd_mod crc32c_intel ahci libahci e1000e libata ehci_pci xhci_pci ehci_hcd sdhci_pci xhci_hcd scsi_mod sdhci mmc_core ptp usbcore pps_core thermal usb_common thermal_sys [last unloaded: speakup]
[ 490.074168] CPU: 2 PID: 10737 Comm: rr Tainted: G C 4.1.0-rc5+ #1
[ 490.074185] Hardware name: LENOVO 232039U/232039U, BIOS G2ET95WW (2.55 ) 07/09/2013
[ 490.074202] task: ffff8804098d0290 ti: ffff8804098e4000 task.ti: ffff8804098e4000
[ 490.074219] RIP: 0010:[
rocallahan
str checkout and build rr at commit 6915ac0 then record firefox startup just until the first page is shown is more than enough. run rr replay set a breakpoint on do_main run continue in gdb observe after js pretty printers say they have been loaded gdb prints connection closed, and the rr process is now a zombie.