From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 103351] Machine check exception on Broadwell quad-core with
SpeedStep enabled
Date: Thu, 08 Oct 2015 10:09:28 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=103351
--- Comment #45 from Alexey Dyachenko ---
Yup, getting elision lock crashes even with updated microcode 0x12.
Core was generated by `/usr/lib/gnome-session/gnome-session-check-accelerated'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00007ff7c1e7c7e0 in __lll_unlock_elision () from /usr/lib/libpthread.so.0
#1 0x00007ff7ba0bf42c in ?? () from /usr/lib/libEGL_nvidia.so.0
#2 0x00007ff7ba04e732 in ?? () from /usr/lib/libEGL_nvidia.so.0
#3 0x00007ffd2dc7c5d0 in ?? ()
#4 0x00007ff7ba0d3fa1 in ?? () from /usr/lib/libEGL_nvidia.so.0
#5 0x00007ffd2dc7c5d0 in ?? ()
#6 0x00007ff7c5cb8885 in _dl_fini () from /lib64/ld-linux-x86-64.so.2
When glibc compiled without lock-elision there is no crash and gdm starts
normally.
I do microcode update with the script from kernel@benjam.info, which I put into
systemd unit, so its not an 'early' update.
Oct 08 09:52:21 yuuzora kernel: microcode: CPU0 sig=0x40671, pf=0x2,
revision=0x10
Oct 08 09:52:21 yuuzora kernel: microcode: CPU0 updated to revision 0x12, date
= 2015-06-19
Oct 08 09:52:21 yuuzora kernel: microcode: CPU1 sig=0x40671, pf=0x2,
revision=0x10
Oct 08 09:52:21 yuuzora kernel: microcode: CPU1 updated to revision 0x12, date
= 2015-06-19
Oct 08 09:52:21 yuuzora kernel: microcode: CPU2 sig=0x40671, pf=0x2,
revision=0x10
Oct 08 09:52:21 yuuzora kernel: microcode: CPU2 updated to revision 0x12, date
= 2015-06-19
Oct 08 09:52:21 yuuzora kernel: microcode: CPU3 sig=0x40671, pf=0x2,
revision=0x10
Oct 08 09:52:21 yuuzora kernel: microcode: CPU3 updated to revision 0x12, date
= 2015-06-19
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