From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7C20DCF58C8 for ; Wed, 19 Nov 2025 18:34:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Subject:References:In-Reply-To: Message-Id:Cc:To:From:Date:MIME-Version:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=0diRFyUXtkkpt9qJEUNuL01RUCwHX752uatMicnPmBo=; b=BIn+whiaddEmBJsX0Q2WBdR2Ht bnS+QXZhFeYD6OzJ+J1EVTKALHWsZ5X5BKQym6r/8+Wza6FyQwG8SUizRd+UlrFvNzuYXIpdVdhzj ylkdf5lPvgrtips85rUiG76jP1klbLufL9Po0csCTiv7ieKGwZuuijOxdGFuzvs+uakCMSZJAXOim pQZ9ODJrwrbKZ1W9fM5ioUhloTHIooAaW/Ssp2aP1mc5Dk3wb5/+edij6ujIQOLr0VpwUUnGcqpr2 MeVJwCo15zvUhvsxbZrI2Nj5pPABAUiM0HJJYWM1EfKSS2kDZ/K81o9ChFa/ytXV/jmbDbnx7G8+c s+zqVtCw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vLn0C-00000004dDz-3BRj; Wed, 19 Nov 2025 18:34:00 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vLn0B-00000004dDf-1Xv0; Wed, 19 Nov 2025 18:33:59 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 53E626019F; Wed, 19 Nov 2025 18:33:58 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 97AEEC4CEF5; Wed, 19 Nov 2025 18:33:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763577238; bh=isuSe0vHAL4pBqh4kPYeDqNJgvukP3SkbC0ClCMHi/U=; h=Date:From:To:Cc:In-Reply-To:References:Subject:From; b=Oj6dh3QF2+yqHgZl00hjnXzhiNz+Kd5gYv4Mj4vHnoLuipqptSvCQU/ENuPdlJrkM QCZqRhvmmZXjGd/NFfGhOlECLddt5EAF6gsnDbdre02U3ZehF2T2bdHQYrvGRRjZRI KIUnyGtdsfnJYxILq0DcK0YYT7H1xJuQ214CUgOUoDfVAz3tSQPe6BZ8jeuzAcBm1p wXft2yGvOtlxxVS/f2uFljuXnVnBuAEiQdQEuRS49EJQ/cQJ3m8lwZTWNnHhaozgGs apJhTg7BHqj7YbEppl1GoT03u3M/p2wK2rr8z7Rl1f58PwIPr+i0ClaOfchr52lQVa yxyq/528F3qvw== Received: from phl-compute-01.internal (phl-compute-01.internal [10.202.2.41]) by mailfauth.phl.internal (Postfix) with ESMTP id 8AE21F40084; Wed, 19 Nov 2025 13:33:55 -0500 (EST) Received: from phl-imap-02 ([10.202.2.81]) by phl-compute-01.internal (MEProxy); Wed, 19 Nov 2025 13:33:55 -0500 X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtdeggddvvdegledvucetufdoteggodetrf dotffvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfurfetoffkrfgpnffqhgenuceu rghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujf gurhepofggfffhvfevkfgjfhfutgfgsehtqhertdertdejnecuhfhrohhmpedftehnugih ucfnuhhtohhmihhrshhkihdfuceolhhuthhosehkvghrnhgvlhdrohhrgheqnecuggftrf grthhtvghrnhepjeejvddvtdehffdtgfejjeefgefgjeeggfeuteeiuedvtefgfffhvdej iefguedtnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomh eprghnugihodhmvghsmhhtphgruhhthhhpvghrshhonhgrlhhithihqdduudeiudekheei fedvqddvieefudeiiedtkedqlhhuthhopeepkhgvrhhnvghlrdhorhhgsehlihhnuhigrd hluhhtohdruhhspdhnsggprhgtphhtthhopeegledpmhhouggvpehsmhhtphhouhhtpdhr tghpthhtohepjhgsrghrohhnsegrkhgrmhgrihdrtghomhdprhgtphhtthhopegsphesrg hlihgvnhekrdguvgdprhgtphhtthhopegrrhhnugesrghrnhgusgdruggvpdhrtghpthht ohepuggrvhgvmhesuggrvhgvmhhlohhfthdrnhgvthdprhgtphhtthhopehmrghthhhivg hurdguvghsnhhohigvrhhssegvfhhfihgtihhoshdrtghomhdprhgtphhtthhopegsohhq uhhnrdhfvghnghesghhmrghilhdrtghomhdprhgtphhtthhopehurhgviihkihesghhmrg hilhdrtghomhdprhgtphhtthhopehrohhsthgvughtsehgohhoughmihhsrdhorhhgpdhr tghpthhtohepjhgrnhhnhhesghhoohhglhgvrdgtohhm X-ME-Proxy: Feedback-ID: ieff94742:Fastmail Received: by mailuser.phl.internal (Postfix, from userid 501) id 4771A700054; Wed, 19 Nov 2025 13:33:55 -0500 (EST) X-Mailer: MessagingEngine.com Webmail Interface MIME-Version: 1.0 X-ThreadId: A1wO5D87xXUg Date: Wed, 19 Nov 2025 10:33:35 -0800 From: "Andy Lutomirski" To: "Dave Hansen" , "Valentin Schneider" , "Linux Kernel Mailing List" , linux-mm@kvack.org, rcu@vger.kernel.org, "the arch/x86 maintainers" , linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linux-riscv@lists.infradead.org, linux-arch@vger.kernel.org, linux-trace-kernel@vger.kernel.org Cc: "Thomas Gleixner" , "Ingo Molnar" , "Borislav Petkov" , "Dave Hansen" , "H. Peter Anvin" , "Peter Zijlstra (Intel)" , "Arnaldo Carvalho de Melo" , "Josh Poimboeuf" , "Paolo Bonzini" , "Arnd Bergmann" , "Frederic Weisbecker" , "Paul E. McKenney" , "Jason Baron" , "Steven Rostedt" , "Ard Biesheuvel" , "Sami Tolvanen" , "David S. Miller" , "Neeraj Upadhyay" , "Joel Fernandes" , "Josh Triplett" , "Boqun Feng" , "Uladzislau Rezki" , "Mathieu Desnoyers" , "Mel Gorman" , "Andrew Morton" , "Masahiro Yamada" , "Han Shen" , "Rik van Riel" , "Jann Horn" , "Dan Carpenter" , "Oleg Nesterov" , "Juri Lelli" , "Clark Williams" , "Yair Podemsky" , "Marcelo Tosatti" , "Daniel Wagner" , "Petr Tesarik" , "Shrikanth Hegde" Message-Id: <292ebf6a-4a7a-43b2-a670-ea53728f2c06@app.fastmail.com> In-Reply-To: References: <20251114150133.1056710-1-vschneid@redhat.com> <20251114151428.1064524-10-vschneid@redhat.com> Subject: Re: [RFC PATCH v7 30/31] x86/mm, mm/vmalloc: Defer kernel TLB flush IPIs under CONFIG_COALESCE_TLBI=y X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org CgpPbiBXZWQsIE5vdiAxOSwgMjAyNSwgYXQgMTA6MzEgQU0sIERhdmUgSGFuc2VuIHdyb3RlOgo+ IE9uIDExLzE0LzI1IDA3OjE0LCBWYWxlbnRpbiBTY2huZWlkZXIgd3JvdGU6Cj4+ICtzdGF0aWMg Ym9vbCBmbHVzaF90bGJfa2VybmVsX2NvbmQoaW50IGNwdSwgdm9pZCAqaW5mbykKPj4gK3sKPj4g KwlyZXR1cm4gaG91c2VrZWVwaW5nX2NwdShjcHUsIEhLX1RZUEVfS0VSTkVMX05PSVNFKSB8fAo+ PiArCSAgICAgICBwZXJfY3B1KGtlcm5lbF9jcjNfbG9hZGVkLCBjcHUpOwo+PiArfQo+Cj4gSXMg aXQgT0sgdGhhdCAna2VybmVsX2NyM19sb2FkZWQnIGNhbiBiZSBiZSBzdGFsZT8gU2luY2UgaXQn cyBub3QgcGFydAo+IG9mIHRoZSBpbnN0cnVjdGlvbiB0aGF0IGFjdHVhbGx5IHNldHMgQ1IzLCB0 aGVyZSdzIGEgd2luZG93IGJldHdlZW4gd2hlbgo+ICdrZXJuZWxfY3IzX2xvYWRlZCcgaXMgc2V0 IChvciBjbGVhcmVkKSBhbmQgQ1IzIGlzIGFjdHVhbGx5IHdyaXR0ZW4uCj4KPiBJcyB0aGF0IE9L Pwo+Cj4gSXQgc2VlbXMgbGlrZSBpdCBjb3VsZCBsZWFkIHRvIGJvdGggdW5uZWNlc3NhcnkgSVBJ cyBiZWluZyBzZW50IGFuZCBmb3IKPiBJUElzIHRvIGJlIG1pc3NlZC4KCkkgcmVhZCB0aGUgY29k ZSBlYXJsaWVyIHRvZGF5IGFuZCBJICp0aGluayogaXTigJlzIG1heWJlIG9rYXkuIEl04oCZcyBx dWl0ZSBjb25mdXNpbmcgdGhhdCB0aGlzIHRoaW5nIGlzIHNwbGl0IGFtb25nIG11bHRpcGxlIHBh dGNoZXMsIGFuZCB0aGUgbWVtb3J5IG9yZGVyaW5nIGlzc3VlcyBuZWVkIGNvbW1lbnRzLgoKVGhl IGZhY3QgdGhhdCB0aGUgYmlnIGZsdXNoIGlzIGJhc2ljYWxseSB1bmNvbmRpdGlvbmFsIGF0IHRo aXMgcG9pbnQgaGVscHMuIFRoZSBmYWN0IHRoYXQgaXTigJlzIHRhbmdsZWQgdXAgd2l0aCBDUjMg ZXZlbiB0aG91Z2ggdGhlIGN1cnJlbnQgaW1wbGVtZW50YXRpb24gaGFzIG5vdGhpbmcgdG8gZG8g d2l0aCBDUjMgZG9lcyBub3QgaGVscC4KCknigJltIGtpbmQgb2Ygd2l0aCBkaGFuc2VuIHRob3Vn aCDigJQgdGhlIGZhY3QgdGhhdCB0aGUgaW1wbGVtZW50YXRpb24gaXMgc28gbmFzdHkgY291cGxl ZCB3aXRoIHRoZSBmYWN0IHRoYXQgbW9kZXJuIENQVXMgY2FuIGRvIHRoaXMgaW4gaGFyZHdhcmUg bWFrZXMgdGhlIHdob2xlIHRoaW5nIGtpbmQgb2YgdW5wYWxhdGFibGUuCgo+Cj4gSSBzdGlsbCBf cmVhbGx5XyB3aXNoIGZvbGtzIHdvdWxkIGJlIHdpbGxpbmcgdG8gZ2V0IG5ld2VyIENQVXMgdG8g Z2V0Cj4gdGhpcyBiZWhhdmlvciByYXRoZXIgdGhhbiBnb2luZyB0aHJvdWdoIGFsbCB0aGlzIGNv bXBsZXhpdHkuIFJBUiBpbgo+IHBhcnRpY3VsYXIgd2FzICpzcGVjaWZpY2FsbHkqIGRlc2lnbmVk IHRvIGtlZXAgVExCIGZsdXNoaW5nIElQSXMgZnJvbQo+IGJsaXBwaW5nIHVzZXJzcGFjZSBmb3Ig dG9vIGxvbmcuCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f XwpsaW51eC1yaXNjdiBtYWlsaW5nIGxpc3QKbGludXgtcmlzY3ZAbGlzdHMuaW5mcmFkZWFkLm9y ZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LXJpc2N2 Cg==