..snip.. > > smpboot: Total of 1 processors activated (4272.42 BogoMIPS) > > devtmpfs: initialized > > I took a guess and got lucky. > > Reverting "x86/smpboot: Remove APIC.wait_for_init_deassert and atomic > > init_deasserted" resolved the issue. > > > As a followup, I updated compiler to gcc-5.2 (no help or change). > I also tried suggested /vmlinuz-4.3.0-rc3 parameter in grub: > "cpu_init_udelay=10000" > which did not help getting missing CPU back online.
Did you try reverting the "x86/smpboot: Remove APIC.wait_for_init_deassert and atomic init_deasserted" patch? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/

