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Message-ID: <1A7043D5F58CCB44A599DFD55ED4C9484693770E@fmsmsx115.amr.corp.intel.com> Date: Thu, 15 Oct 2015 02:09:30 +0000 From: "Brown, Len" <len.brown@...el.com> To: shrybman <shrybman@...savvy.com>, Donald Parsons <dparsons@...ghtdsl.net> CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: RE: Re[2]: 3.4-rc smpboot: do_boot_cpu failed(-1) to wakeup CPU#1 Donald, Shane, Thanks for reporting this. > > 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. right, if the issue is caused by the patch below, that cmdline will not help. > Did you try reverting the "x86/smpboot: Remove APIC.wait_for_init_deassert > and atomic init_deasserted" patch? Yes, please let me know if reverting that patch helps you too. You have similar hardware: Shane: smpboot: CPU0: Intel(R) Core(TM)2 CPU 6400 @ 2.13GHz (fam: 06, model: 0f, stepping: 06) Donald: CPU : Intel Core 2 CPU 6600 @ 2.4GHz I think I can get ahold of a core2 6xxx box tomorrow. Please send me your .config directly, and I'll see if I can reproduce the issue. thanks, -Len
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