Date: Sat, 8 Oct 2022 15:26:04 -0700 From: Gleb Smirnoff <glebius@freebsd.org> To: Kristof Provost <kp@freebsd.org> Cc: src-committers@freebsd.org, dev-commits-src-all@freebsd.org, dev-commits-src-main@freebsd.org Subject: Re: git: 133935d26f20 - main - pf: atomically increment state ids Message-ID: <Y0H4/IQ3STFvnm6m@FreeBSD.org> In-Reply-To: <202210081641.298GfT2F036984@gitrepo.freebsd.org> References: <202210081641.298GfT2F036984@gitrepo.freebsd.org>
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On Sat, Oct 08, 2022 at 04:41:29PM +0000, Kristof Provost wrote: K> commit 133935d26f20c0b9c433da9a2b32bcbe562bc2c5 K> Author: Kristof Provost <kp@FreeBSD.org> K> AuthorDate: 2022-10-07 17:17:06 +0000 K> Commit: Kristof Provost <kp@FreeBSD.org> K> CommitDate: 2022-10-08 16:27:29 +0000 K> K> pf: atomically increment state ids K> K> Rather than using a per-cpu state counter, and adding in the CPU id we K> can atomically increment the number. K> This has the advantage of removing the assumption that the CPU ID fits K> in 8 bits. K> K> Event: Aberdeen Hackathon 2022 K> Reviewed by: mjg K> Differential Revision: https://reviews.freebsd.org/D36915 This adds an atomic operation on a single word on a state creation :( Previously two state creations could run in parallel without negatively affecting each other. -- Gleb Smirnoff
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