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McKenney" , rcu@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@meta.com, Boqun Feng , Steven Rostedt , lkmm@lists.linux.dev, Zqiang , Wang Lian , Kunwu Chan , Nicholas Piggin , Michael Ellerman , Greg Kroah-Hartman , Sebastian Andrzej Siewior , Will Deacon , Peter Zijlstra , Alan Stern , John Stultz , Andrew Morton , Frederic Weisbecker , Joel Fernandes , Josh Triplett , Uladzislau Rezki , Lai Jiangshan , Zqiang , Ingo Molnar , Waiman Long , Mark Rutland , Thomas Gleixner , Vlastimil Babka , maged.michael@gmail.com, Mateusz Guzik , Jonas Oberhauser , linux-mm@kvack.org References: <20260919000056.3132131-1-paulmck@kernel.org> <6B1FC39D-6EB0-433A-8E49-E5EFC9379AD7@mainlining.org> From: Mathieu Desnoyers Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: YQBPR0101CA0285.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:c01:6d::21) To YT6PR01MB491026.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:1d0::10) 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If *that* can be converted, and it shows real improvements on > some real benchmark, then I'm sold. [ Side-discussion, not related to hazard pointers. ] Talking about dcache improvements: I've been working on scalability of rename, directory move, and directory listing, basically killing dcache global locks, seqlocks and rwlocks which significantly limit dcache update and read-side scalability. Those improvements are based on RCU, not hazard pointers, and on a new "RCU pseudo-transaction" concept I've invented earlier this year. I'm preparing a paper and I plan to present it at LPC in Prague. My benchmark results are on a userspace port of the Linux kernel dentry cache at this point, so it's not ready for anything close to upstream at this stage. Cheers, Mathieu -- Mathieu Desnoyers EfficiOS Inc. https://www.efficios.com