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[23.128.96.18]) by mx.google.com with ESMTP id co27si6600194edb.376.2021.03.13.04.43.49; Sat, 13 Mar 2021 04:44:28 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=XeFGAlmU; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232627AbhCMMjV (ORCPT + 99 others); Sat, 13 Mar 2021 07:39:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34202 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229615AbhCMMi7 (ORCPT ); Sat, 13 Mar 2021 07:38:59 -0500 Received: from mail-io1-xd2d.google.com (mail-io1-xd2d.google.com [IPv6:2607:f8b0:4864:20::d2d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B3A8C061574; Sat, 13 Mar 2021 04:38:59 -0800 (PST) Received: by mail-io1-xd2d.google.com with SMTP id u20so28609832iot.9; Sat, 13 Mar 2021 04:38:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:reply-to:from:date:message-id :subject:to:cc; bh=cgJ+VtAGOS3jTRYXST2zAk0X7X8186uEYL3R4mCpWkQ=; b=XeFGAlmUSuI28aEPPtCPicYmGAqKS2T6ZF8AfvV1syPnlrWdcPggRwvM1ugcf65/nu 5BThcRA0Ucp2WMcVuik0B/0/zM7OR/CXfhhkXzvs4B0XjZMMrc2wOCmPYc48q1xPXx4m thwwnzUEZKEMFS6Rb+c0AayQ6bJ7sY9OBdVSczl95JrR8f/WiR+exU55hFj3ckpwyqLa ic2/grPvWUgxOC/EsfUWTMJDXHHGVNbuGrbw83gUnDpH8bPahyYna5RBx/pbXfuoZWUm +aQP2zdvuyM4JN+gtRRZ4l4jl+hgGIPx6hleVg2a6/69WR5n9PlrvnSX9vzAtjQU5PKq jnUg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:reply-to :from:date:message-id:subject:to:cc; bh=cgJ+VtAGOS3jTRYXST2zAk0X7X8186uEYL3R4mCpWkQ=; b=MgDH8FuuZhuQ1QMORTclPORMQL/mb9205JwiSKsE6xOU0Eo8KYmZ2HwpUImUY9A5bJ olxY+TFNxwyddlt7hmKaAiuLrecC5tzHDnrEQqASx2VlDD28zDuX1RkZlzN03dFZ6bs6 304j/t63jLJVbSu8hs7h/o0SIriw78UcoyptOW/PZ6/ejH3zTX0qRPehFH8U+qU8YGjU AkkH31eNe68am7Lu/s98Jo9sMyUuY+SN9ae4QF7jljK/eP+x13O8BDZBQbdp99t/lwYY Uc2P4ih3ZwIORbCcs/SEz2+I7cEMoXU3oRGobH3A0f9i6RxvaeNFp7hLbedBZ7XyXn29 /StQ== X-Gm-Message-State: AOAM532fZq0vFgpU4OtiVii69msWGif4xnBDEBimtYm+FkPRHTHQwDDv RUrIh6+c8NboEpH8MLm7F/mOYDyPQitriOVQxIzAwsBBlhbH/Q== X-Received: by 2002:a02:b890:: with SMTP id p16mr3091242jam.138.1615639138613; Sat, 13 Mar 2021 04:38:58 -0800 (PST) MIME-Version: 1.0 References: <20210312113253.305040674@infradead.org> <20210312205914.GG22098@zn.tnic> <20210313084923.GA16144@zn.tnic> <20210313121541.GC16144@zn.tnic> In-Reply-To: <20210313121541.GC16144@zn.tnic> Reply-To: sedat.dilek@gmail.com From: Sedat Dilek Date: Sat, 13 Mar 2021 13:38:22 +0100 Message-ID: Subject: Re: [PATCH 0/2] x86: Remove ideal_nops[] To: Borislav Petkov Cc: Peter Zijlstra , x86@kernel.org, rostedt@goodmis.org, hpa@zytor.com, torvalds@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-toolchains@vger.kernel.org, jpoimboe@redhat.com, alexei.starovoitov@gmail.com, mhiramat@kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Mar 13, 2021 at 1:15 PM Borislav Petkov wrote: > > On Sat, Mar 13, 2021 at 01:10:29PM +0100, Sedat Dilek wrote: > > Here we go: > > > > https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/patch/?id=864b435514b286c0be2a38a02f487aa28d990ef8 > > That's why I told earlier you to use tip/master - that patch is already > in it and all you would've needed to do is to apply the two nop patches. > Thanks for all your testings and suggestions. For me it was easier to apply these 3 patches on top of my custom patchset to see what impact Peter's patchset. AFAICS you did a 5 times x86-64 defconfig with dropped pagecache and `make -j9`? I run my "normal" workflow(s) (and build-script) for easier comparison on my side. Big thank-you for testing with LLVM/Clang v11.x - twice as slow as with GCC :-(. A selfmade ThinLTO+PGO optimized LLVM tooolchain v11.x/v12-rcX/v13-git is here as fast as Debian's GCC-v10.2.1 to build a Linux-kernel - approx. 03:30 [hh:mm] - full adapted Debian v5.10.y kernel-config. Does your distribution offer LLVM/Clang v12.0.0-rc3 (released this week) binaries? - Sedat -