On 12/29/2017 10:17 PM, Linus Torvalds wrote:
On Fri, Dec 29, 2017 at 1:02 PM, Toralf Förster toralf.foerster@gmx.de wrote:
On 12/29/2017 09:12 PM, Linus Torvalds wrote:
instead, and see if that makes a difference, that would narrow down the possible root cause of this problem.
not at this ThinkPad T440s (didn't test at the server with an i7-3930).
Boot stops just at:
tsc: Refined TSC clocksource calibration: 2494.225 MHz clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x23f3ea95b09, max_idle_ns: 440795287034 ns
Uhhuh. So for Alexander Troy, just getting rid of the -march=core2 fixed the boot.
But not for you.
Strange. It really looked like the exact same thing.
This is a "Intel(R) Core(TM) i5-4300U CPU @ 1.90GHz" with gcc-6.4
Yeah, other reporters of this have used gcc-6.4.0 too.
But there's been some muddying of the waters there too - changing compilers have fixed it for some cases, but there's at least one report that a kernel build with gcc-7.2.0 still had the issue (and another that said it didn't).
But the MCORE2 was consistent for several people - including you. Until this point.
Strange.
The only other thing (apart from the compiler flag) that MCORE2 results in is to enable
CONFIG_X86_INTEL_USERCOPY CONFIG_X86_USE_PPRO_CHECKSUM CONFIG_X86_P6_NOP
and the two first of those shouldn't even matter on x86-64, and I don't see that last one making any difference either.
So because it looks so impossible that the "-march=core2" didn't make a difference for you, I'll ask you to please double-check that you actually booted into the right kernel.
Sorry for doubting you, but your report just broke the _one_ consistent thing we've seen about this bug.
Linus
I double-checked it.
The bad news - the issue is not solved with the changed cflags. The good news - I could compile eventually a working config for my desktop (works fine with 4.14.10 with generic CPU) having a higher screen resolution during boot.
So I made a "make distclean", followed by a "sudo zcat /proc/config.gz > .config", changed the .config to use MCORE2 instead of GENERIC and defined the string "-local" to ensure that the modules directory is really unique. Then I run "time make -j4 && sudo make modules_install && sudo cp arch/x86_64/boot/bzImage /boot/vmlinuz-0 && sudo grub-mkconfig -o /boot/grub/grub.cfg", booted and made 3 fotos which were uploaded to [1], look for IMG_*
[1] https://zwiebeltoralf.de/pub/