Re: [patch v3 35/36] x86/smpboot: Support parallel startup of secondary CPUs

From: Peter Zijlstra
Date: Tue May 09 2023 - 09:58:48 EST

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On Mon, May 08, 2023 at 09:44:23PM +0200, Thomas Gleixner wrote:
> + /* APIC ID not found in the table. Drop the trampoline lock and bail. */
> + movq trampoline_lock(%rip), %rax

Again:

movl $0, (%rax)

is sufficient for unlock.

> + lock
> + btrl $0, (%rax)

Next message: Jens Axboe: "Re: [GIT PULL] Final io_uring updates for 6.4-rc1"
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In reply to: Thomas Gleixner: "[patch v3 35/36] x86/smpboot: Support parallel startup of secondary CPUs"
Next in thread: Thomas Gleixner: "[patch v3 25/36] parisc: Switch to hotplug core state synchronization"
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