Received: by 2002:a05:7412:8d10:b0:f3:1519:9f41 with SMTP id bj16csp6900574rdb; Fri, 15 Dec 2023 11:14:28 -0800 (PST) X-Google-Smtp-Source: AGHT+IG+gP/UgwpuA0FPhJFgXoagyUGwRVt6Aq7Pr+S81GxrtqLVtXHFhEn4S25CXNSZbvi0vtHz X-Received: by 2002:a17:902:e54e:b0:1d0:b42f:e41b with SMTP id n14-20020a170902e54e00b001d0b42fe41bmr13805084plf.64.1702667668361; Fri, 15 Dec 2023 11:14:28 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1702667668; cv=none; d=google.com; s=arc-20160816; b=OqaElfuNl8lM1g4qdjfwbQdlLePE4s2D051GtPbkj25uq1FDDM7F+9jzPgCj6Mxiva kZEHjvoT5g9loaY6Q173FkKf0meEXaczbXU5+1cjjC0AKA4NwoBaytDdhtODySQN0Kjz QX4QyGe1yvHgwJurfopi9XkXfVUuQRu/MPq0lzCJK+mLuTSAQjR2lAm6MgiAIPMZA/CC xxoD2Jfk+6rjczIUyU6xv23IS2jhboZZHhq35BNJq7nkzpI/UTUSwfGKusGg8rZRBAtp KrcadKMKh9HqmBaT0oqg8Li3Z4h3/kUOfglpN/yT/QgPZmkZFuHv4X7ZInmGBqNT1wpw zcTQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:list-unsubscribe:list-subscribe:list-id:precedence :message-id:date:references:in-reply-to:subject:cc:to:dkim-signature :dkim-signature:from; bh=I0hHN3RnKj4ClKstTe8LPIswNpLId53VLjBBZOC5iHs=; fh=eryH1WYb1Y0UbEsQ3EwbE4zAyMj6pl5a5xQH3pusM4k=; b=afKOvSRrVVuWuH/N0v/M0tA05gf5rkI98tIi9TuXj8WKP/BOiWdpsISRYM9RqC5dLh 7GlTCz33WqkzuvA0BBNUk6lUyVq2jgnm09OCR9D/3AQbl9+z6TigqVTaz4rPCuL8VmX4 AuUQlF1WUFhTsV0RqmSCso2dx3eRmd+u0mgbHV9sSLkFx0AuM+RhtwBcN6rKaB9nPgdb dUbemZbkPPCln1ygJIP1M5bGIuCmSYH4Is4IjQ27Zs8752xP8OiB3pBx0GHR7IJ35Gcf DXm1L9nXc08h3WV0N2isB3FFNuX3dn6D6TBb+oW2gq0uLITawPNl0D/HbljVrsEyonhE 0XJQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linutronix.de header.s=2020 header.b=DCgKKAs9; dkim=neutral (no key) header.i=@linutronix.de; spf=pass (google.com: domain of linux-kernel+bounces-1549-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-1549-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=linutronix.de Return-Path: Received: from sv.mirrors.kernel.org (sv.mirrors.kernel.org. [2604:1380:45e3:2400::1]) by mx.google.com with ESMTPS id q6-20020a170902bd8600b001d34dd65eeasi5098164pls.528.2023.12.15.11.14.28 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Dec 2023 11:14:28 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-1549-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) client-ip=2604:1380:45e3:2400::1; Authentication-Results: mx.google.com; dkim=pass header.i=@linutronix.de header.s=2020 header.b=DCgKKAs9; dkim=neutral (no key) header.i=@linutronix.de; spf=pass (google.com: domain of linux-kernel+bounces-1549-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-1549-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=linutronix.de Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sv.mirrors.kernel.org (Postfix) with ESMTPS id F1A3E2873B7 for ; Fri, 15 Dec 2023 19:06:19 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 1417041846; Fri, 15 Dec 2023 19:06:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="DCgKKAs9"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="M/ib60cs" X-Original-To: linux-kernel@vger.kernel.org Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6A7E73FB34 for ; Fri, 15 Dec 2023 19:06:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1702667161; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=I0hHN3RnKj4ClKstTe8LPIswNpLId53VLjBBZOC5iHs=; b=DCgKKAs9oL7sERRcO8sIomMuOWsEMgeyqtxUPX9sx9sXSsABGqpSHt1MpK7pGPv6GydrZL OyRUIn92ltypPaAqPNi9tMsPpMA9ZyuVW/4UX6lEhTyiwhaq1p6JN4Ac8qOhBeTtd9hGok fLVX4MYPqWNZ3/4c7xRwgLiilEzjR+2JGKRrRZL/ixPVcwsKBRUtCOkha5Dk60IZBN81R2 bM8mGaKFTF5GxTgsiHGvZSgzogZpzIeJKk9+aCg30Kfyj7pukdplmkHYT84NhNtfkq+wGv MTbDmKjgVVNrp02I4mYlqChmZOmE7FKaTBfITb1asjE+UWLLKwDyTbbdR/HszA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1702667161; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=I0hHN3RnKj4ClKstTe8LPIswNpLId53VLjBBZOC5iHs=; b=M/ib60csaRtPn3fF/G22mmT0S5E/sVbk0NqIHN4+WrCQjp6pfJM13TKqt8PHbI1KOM9qKx els4oGs/fA2RVZDQ== To: Sven Schnelle Cc: Peter Zijlstra , Andy Lutomirski , linux-kernel@vger.kernel.org, Heiko Carstens Subject: Re: [PATCH 0/3] entry: inline syscall enter/exit functions In-Reply-To: References: <20231205133015.752543-1-svens@linux.ibm.com> <20231206110202.GD30174@noisy.programming.kicks-ass.net> Date: Fri, 15 Dec 2023 20:06:00 +0100 Message-ID: <87ttojmgkn.ffs@tglx> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Thu, Dec 14 2023 at 09:24, Sven Schnelle wrote: > Peter Zijlstra writes: >>> so the time required for one syscall dropped from 94.8ns to >>> 84.7ns, which is a drop of about 11%. >> >> That is obviously very nice, and I don't immediately see anything wrong >> with moving the lot to header based inlines. >> >> Thomas? No objections in principle. Let me look at the lot