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From: David Woodhouse <dwmw2@infradead.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	"Paul E. McKenney" <paulmck@kernel.org>,
	linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
	rcu@vger.kernel.org, mimoja@mimoja.de, hewenliang4@huawei.com,
	hushiyuan@huawei.com, luolongjun@huawei.com,
	hejingxian@huawei.com
Subject: Re: [PATCH 09/11] x86/boot: Support parallel startup of secondary CPUs
Date: Tue, 14 Dec 2021 11:33:10 +0000	[thread overview]
Message-ID: <e0ead5eafb83937ca6a9cacd5bcda2a1a862b078.camel@infradead.org> (raw)
In-Reply-To: <YbIl35L+8lH6RzE1@hirez.programming.kicks-ass.net>

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On Thu, 2021-12-09 at 16:50 +0100, Peter Zijlstra wrote:
> On Thu, Dec 09, 2021 at 03:09:36PM +0000, David Woodhouse wrote:
> 
> > +	lock
> > +	btrl	$0, (%rax)
> 
> 
> > +	lock
> > +	btsw	$0, tr_lock
> 
> I find that really weird style, but whatever..

I think it's fairly gratuitous too. There's no reason we can't use btsl
even in .code16. I'll fix it.

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  reply	other threads:[~2021-12-14 11:33 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-09 15:09 [PATCH 00/11] Parallel CPU bringup for x86_64 David Woodhouse
2021-12-09 15:09 ` [PATCH 01/11] x86/apic/x2apic: Fix parallel handling of cluster_mask David Woodhouse
2021-12-09 15:09 ` [PATCH 02/11] rcu: Kill rnp->ofl_seq and use only rcu_state.ofl_lock for exclusion David Woodhouse
2021-12-09 17:18   ` Paul E. McKenney
2021-12-09 18:52     ` David Woodhouse
2021-12-09 18:31   ` Neeraj Upadhyay
2021-12-09 18:43     ` David Woodhouse
2021-12-09 19:21     ` [PATCH v1.1 " David Woodhouse
2021-12-10  4:26       ` Neeraj Upadhyay
2021-12-13  8:57         ` David Woodhouse
2021-12-13  9:11           ` Neeraj Upadhyay
2021-12-09 15:09 ` [PATCH 03/11] rcu: Add mutex for rcu boost kthread spawning and affinity setting David Woodhouse
2021-12-09 17:20   ` Paul E. McKenney
2021-12-09 15:09 ` [PATCH 04/11] cpu/hotplug: Add dynamic parallel bringup states before CPUHP_BRINGUP_CPU David Woodhouse
2021-12-09 15:09 ` [PATCH 05/11] x86/smpboot: Reference count on smpboot_setup_warm_reset_vector() David Woodhouse
2021-12-09 15:09 ` [PATCH 06/11] x86/smpboot: Split up native_cpu_up into separate phases David Woodhouse
2021-12-09 15:09 ` [PATCH 07/11] cpu/hotplug: Move idle_thread_get() to <linux/smpboot.h> David Woodhouse
2021-12-09 15:09 ` [PATCH 08/11] x86/tsc: Avoid synchronizing TSCs with multiple CPUs in parallel David Woodhouse
2021-12-09 15:43   ` Peter Zijlstra
2021-12-09 15:50     ` David Woodhouse
2021-12-09 15:09 ` [PATCH 09/11] x86/boot: Support parallel startup of secondary CPUs David Woodhouse
2021-12-09 15:50   ` Peter Zijlstra
2021-12-14 11:33     ` David Woodhouse [this message]
2021-12-09 15:09 ` [PATCH 10/11] x86/smp: Bring up secondary CPUs in parallel David Woodhouse
2021-12-09 15:09 ` [PATCH 11/11] x86/kvm: Silence per-cpu pr_info noise about KVM clocks and steal time David Woodhouse
2021-12-09 17:39   ` Paolo Bonzini

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