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 C3515C3DA78 for ; Fri, 13 Jan 2023 20:50:41 +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:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=L2dWXA1wD68AbeGmiDnSdhiVKcZUi9j/iTleEEjb9L4=; b=kSr+XqTWcYoVKG bjC3u12Yo7WEMPGD1kbWli9tN8KtDBvz56mdEE0i6tRvBEeWXVwabmomuK+qoc005A/X+hwPUFN2L G9BzdovkkrrLr0J37F6OyScjBKh6PUKmKXbG3RrAb/VGwMflCB7UA0ySZjed4xl395hOkN3bYOdEq G9OQXsxwXSLWPm6f0KrCWEyvq/YoGEt5c3rV/SDr/NOHU2IoPJ2Qusx+nFLtJq9oGTAGL7bp/0rfX blD1bHqaByrHs38yGABW5K46+nnYrLilqhaDDa8XIVOKS+Hp1C5ra30SN9XQqzZn5Q+vX+pDY9jmD 6yDAKesy1hvvhwF7t4Vg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pGQzO-004MoY-HJ; Fri, 13 Jan 2023 20:49:26 +0000 Received: from mail-wm1-x334.google.com ([2a00:1450:4864:20::334]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pGQzL-004Mnf-Hm for linux-arm-kernel@lists.infradead.org; Fri, 13 Jan 2023 20:49:24 +0000 Received: by mail-wm1-x334.google.com with SMTP id ay40so16039463wmb.2 for ; Fri, 13 Jan 2023 12:49:22 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=jrtc27.com; s=gmail.jrtc27.user; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=B0IXTHEul8oECO64H+NEFJZ1qZc9qTDXKUg0Yyv928s=; b=FgOZvqmOpohh4tjpZEZ9CiXUhhr3LLBo4dA48IAxIhLjKRNzLWoSQGdQupZwZx2+a1 krXP+VtZRNcB7GdHtr2PG0P3jgzQePGUseTXsfRp63ZbvZrp3Uc4XpYCnS+LP25dkZ95 p23CNG08OAxRnyAA4EJAYVI7OunGePsBP7doUFtPkM/gwzG1jmPaXc5ciDagQnOdy4wy s9Sa1gFTXJPk0ZL7UYSYgCifwD6RXePFjLOyq/KA+KXtX3WgO+LtEXPNys/DXTZsRmtj U9g4CIIQ3CHJVwjfO9xX40BkGLMqo04IhX8m8rqajPn9yoEJ/r4y4Z3HBd5RZ3P5EAz/ yWZA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=B0IXTHEul8oECO64H+NEFJZ1qZc9qTDXKUg0Yyv928s=; b=fZE8FM1f/3oE3f9lZ3PZ/iQvDwNtb/92KP1+/rgz9qFJ9Bd39XHdU0J8M1PlDtHNwO pMrpDrOQMOo75jjYQLF+KP92luzOkdCIv2qmS7R3/w/KcBU2uoeEW6Vt8tNeFFjrs5lm ZylI/PExgcg8/CJB3Jb7Eg9mDFAhMY/iYBIp6kvXJvRtGZrRD7QYBGwqTBFpub4bNf/z I+3r0MLqEeIY3cyVUB/Ep7e9cuSJX8zcOPvQBthX7kxE2jIepg1NQNWiT1pMvzWF3zvh nC+g0F2JtXlnWed2FHeUVSNhZFRPP7mJa+rbUzgeYPDRDRhRw3Rk8/LxZlGhDCV6jPAU p9uA== X-Gm-Message-State: AFqh2koBBCeQsGPUlt5TCvxLs37885xY8ZmBuLyqw8mt/jB/QtX7xwli tYWZU/uDktuRvS9zRXpaAOYaYA== X-Google-Smtp-Source: AMrXdXt9VkcefpvBZsD3+f4QlFMXVMwT0tj/VKStUIzMmlGFyYGBNJWbiXy0v10sDYiPsjjqoZs3lw== X-Received: by 2002:a05:600c:2318:b0:3c6:e63e:23e9 with SMTP id 24-20020a05600c231800b003c6e63e23e9mr62275003wmo.24.1673642961366; Fri, 13 Jan 2023 12:49:21 -0800 (PST) Received: from Jessicas-MacBook-Pro.localdomain (global-5-143.n-2.net.cam.ac.uk. [131.111.5.143]) by smtp.gmail.com with ESMTPSA id e18-20020a05600c4e5200b003d9876aa04asm30903605wmq.41.2023.01.13.12.49.20 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Fri, 13 Jan 2023 12:49:20 -0800 (PST) Received: by Jessicas-MacBook-Pro.localdomain (Postfix, from userid 501) id 2689A4823B3E; Fri, 13 Jan 2023 20:49:19 +0000 (GMT) Date: Fri, 13 Jan 2023 20:49:19 +0000 From: Jessica Clarke To: Ard Biesheuvel Cc: "Luck, Tony" , "Torvalds, Linus" , Mateusz Guzik , linux-arch , Catalin Marinas , Will Deacon , Michael Ellerman , "linux-fsdevel@vger.kernel.org" , "viro@zeniv.linux.org.uk" , Jan Glauber , Linux ARM , linuxppc-dev Subject: Re: ia64 removal (was: Re: lockref scalability on x86-64 vs cpu_relax) Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230113_124923_638756_58D7F7BA X-CRM114-Status: GOOD ( 20.30 ) X-BeenThere: linux-arm-kernel@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="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Jan 13, 2023 at 08:55:41AM +0100, Ard Biesheuvel wrote: > On Fri, 13 Jan 2023 at 01:31, Luck, Tony wrote: > > > > > Yeah, if it was ia64-only, it's a non-issue these days. It's dead and > > > in pure maintenance mode from a kernel perspective (if even that). > > > > There's not much "simultaneous" in the SMT on ia64. One thread in a > > spin loop will hog the core until the h/w switches to the other thread some > > number of cycles (hundreds, thousands? I really can remember). So I > > was pretty generous with dropping cpu_relax() into any kind of spin loop. > > > > Is it time yet for: > > > > $ git rm -r arch/ia64 > > > > Hi Tony, > > Can I take that as an ack on [0]? The EFI subsystem has evolved > substantially over the years, and there is really no way to do any > IA64 testing beyond build testing, so from that perspective, dropping > it entirely would be welcomed. For what it's worth, Debian and Gentoo both have ia64 ports with active users (6.1 looks like it currently fails to build in Debian due to a minor packaging issue, but various versions of 6.0 were built and published, and one of those is running on the one ia64 Debian builder I personally have access to). Jess _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel