> On 2020-02-05, Sergey Senozhatsky <sergey.senozhatsky.work@xxxxxxxxx> wrote: >>>>> So there is a General protection fault. That's the type of a >>>>> problem that kills the boot for me as well (different backtrace, >>>>> tho). >>>> >>>> Do you have CONFIG_RELOCATABLE and CONFIG_RANDOMIZE_BASE (KASLR) >>>> enabled? >>> >>> Yes. These two options are enabled. >>> >>> CONFIG_RELOCATABLE=y >>> CONFIG_RANDOMIZE_BASE=y >> >> So KASLR kills the boot for me. So does KASAN. > > Sergey, thanks for looking into this already! > >> John, do you see any of these problems on your test machine? > > For x86 I have only been using qemu. (For hardware tests I use arm64-smp > in order to verify memory barriers.) With qemu-x86_64 I am unable to > reproduce the problem. > > Lianbo, thanks for the report. Can you share your boot args? Anything > special in there (like log_buf_len=, earlyprintk, etc)? > Thanks for your response. Here is my kernel command line: Command line: BOOT_IMAGE=(hd0,msdos1)/vmlinuz-5.5.0-rc7+ root=/dev/mapper/intel--wildcatpass--07-root ro crashkernel=512M resume=/dev/mapper/intel--wildcatpass--07-swap rd.lvm.lv=intel-wildcatpass-07/root rd.lvm.lv=intel-wildcatpass-07/swap console=ttyS0,115200n81 BTW: Actually, I put the complete kernel log in my last email reply, you could check the attachment if needed. > Also, could you share your CONFIG_LOG_* and CONFIG_PRINTK_* options? > Sure. Please refer to it. [root@intel-wildcatpass-07 linux]# grep -nr "CONFIG_LOG_" .config 134:CONFIG_LOG_BUF_SHIFT=20 135:CONFIG_LOG_CPU_MAX_BUF_SHIFT=12 [root@intel-wildcatpass-07 linux]# grep -nr "CONFIG_PRINTK_" .config 136:CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=13 207:CONFIG_PRINTK_NMI=y 7758:CONFIG_PRINTK_TIME=y 7759:# CONFIG_PRINTK_CALLER is not set Do you have any suggestions about the size of CONFIG_LOG_* and CONFIG_PRINTK_* options by default? Thanks. Lianbo > I will move to bare metal x86_64 and hopefully see it as well. > > John > _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
