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Message-ID: <87mt5qwc7q.ffs@tglx>
Date: Tue, 07 Feb 2023 01:28:25 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: Usama Arif <usama.arif@...edance.com>, dwmw2@...radead.org,
arjan@...ux.intel.com
Cc: mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
hpa@...or.com, x86@...nel.org, pbonzini@...hat.com,
paulmck@...nel.org, linux-kernel@...r.kernel.org,
kvm@...r.kernel.org, rcu@...r.kernel.org, mimoja@...oja.de,
hewenliang4@...wei.com, thomas.lendacky@....com, seanjc@...gle.com,
pmenzel@...gen.mpg.de, fam.zheng@...edance.com,
punit.agrawal@...edance.com, simon.evans@...edance.com,
liangma@...ngbit.com, David Woodhouse <dwmw@...zon.co.uk>,
Usama Arif <usama.arif@...edance.com>
Subject: Re: [PATCH v6 08/11] x86/smpboot: Send INIT/SIPI/SIPI to secondary
CPUs in parallel
On Thu, Feb 02 2023 at 21:56, Usama Arif wrote:
> From: David Woodhouse <dwmw@...zon.co.uk>
>
> When the APs can find their own APIC ID without assistance, we can do
We can do nothing ... Again, read Documentation/process ...
> the AP bringup in parallel.
> /**
> * arch_disable_smp_support() - disables SMP support for x86 at runtime
> */
> @@ -1550,6 +1560,10 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
> do_parallel_bringup = false;
> }
>
> + if (do_parallel_bringup)
> + cpuhp_setup_state_nocalls(CPUHP_BP_PARALLEL_DYN, "x86/cpu:kick",
> + native_cpu_kick, NULL);
https://www.kernel.org/doc/html/latest/process/maintainer-tip.html#bracket-rules
Thanks,
tglx
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