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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9B899E743C0 for ; Thu, 28 Sep 2023 20:53:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232262AbjI1UxY (ORCPT ); Thu, 28 Sep 2023 16:53:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47968 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231822AbjI1UxW (ORCPT ); Thu, 28 Sep 2023 16:53:22 -0400 Received: from mail-ej1-x629.google.com (mail-ej1-x629.google.com [IPv6:2a00:1450:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 17024180 for ; Thu, 28 Sep 2023 13:53:20 -0700 (PDT) Received: by mail-ej1-x629.google.com with SMTP id a640c23a62f3a-99357737980so1745942766b.2 for ; Thu, 28 Sep 2023 13:53:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1695934398; x=1696539198; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:from:to:cc:subject:date:message-id :reply-to; bh=oarHGigZ2g+kUjj4FbG0DTMQJe2n18jj+wl6eh8aRW0=; b=d7n5v+uYkRr9OelsyVFl0SpyDbT4COd2UW4iW4JcF/Lqk/yZ5uco3Mf0uBD7b+2CKN UzWhypsxX1ZUs31s2U798kR1/fZh2Gad9GdNuE3Z68TuG7HSCyCryOe2zGnXbRBFgG1o bZLDCbYskCuYTPquDM3qr1iDRggKnG8Ox3CBXpZPkP3GNQJ/MxbkGt4JYjoGHlSqibWc aYn8o4m2y5BvXMxagIPfV6Wa+TxfmGMi24T99Agi4H2C6wXUpNnDDdDCoYPbOmxE5KJt gBotRN1MF9Lgp3B4zWx93/bQxoBblrg5I2a/oGXWuF5jZCDpHEJi2Ut5dFiQdcH5rE3y 2qfQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1695934398; x=1696539198; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=oarHGigZ2g+kUjj4FbG0DTMQJe2n18jj+wl6eh8aRW0=; b=NFo7lroIgko9zSIK+hnyMysex9VOk58ukM0VAEUPACTpL5V4Tats18Xh2lXB8MusXU glfNeiAaPiJDDKcrpvmd8v/egtNs0kX6C02RYj9Pgu7uXCDxWQ1PgmZ932KH1NZg+Ax7 6VSsbKtbTumVrL2RXD6nJc1MNv9Rgoz88twXB8Y9OzYTprvCmtZNS1CLELQpyNFHGMip 62lomBZcGL8eoNSdN2TwYFn0s97LrddyVyVvWJIijzPp1kenbH1D261Wi0zrQkX8Cppn AYQGWWBDB6SwdgWghF3IOqQtB4t0KaBAAvqqhyZCeXi+t3bVexwQKcipUGUyy4vLo8Zz ph3g== X-Gm-Message-State: AOJu0YwrIViLMC20HiUfQ3K1oSm6NR3WKmvunv0I2kmBoF+/SGBuBtqI bnhsLN6q9FylPLZ0gM+1Ndg= X-Google-Smtp-Source: AGHT+IFqC4PlKLBf9wG5aE9nBibQLVWC1Y+zxiLxuz1f3j13EOA9qJ4cYASg/H5Xz4LLfcISv3g3DA== X-Received: by 2002:a17:907:6c14:b0:9b2:8c37:82a with SMTP id rl20-20020a1709076c1400b009b28c37082amr1972785ejc.35.1695934398160; Thu, 28 Sep 2023 13:53:18 -0700 (PDT) Received: from gmail.com (1F2EF49C.nat.pool.telekom.hu. [31.46.244.156]) by smtp.gmail.com with ESMTPSA id lw13-20020a170906bccd00b0098884f86e41sm11214113ejb.123.2023.09.28.13.53.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Sep 2023 13:53:17 -0700 (PDT) Sender: Ingo Molnar Date: Thu, 28 Sep 2023 22:53:15 +0200 From: Ingo Molnar To: Uros Bizjak Cc: x86@kernel.org, linux-kernel@vger.kernel.org, Peter Zijlstra , Thomas Gleixner , Borislav Petkov , Dave Hansen , "H. Peter Anvin" Subject: Re: [RESEND PATCH 2/2] locking/x86: Wire up sync_try_cmpxchg Message-ID: References: <20230925150905.54842-1-ubizjak@gmail.com> <20230925150905.54842-2-ubizjak@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230925150905.54842-2-ubizjak@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Uros Bizjak wrote: > Implement target specific support for sync_try_cmpxchg. Could you please provide a before/after description of how this improves things exactly? Thanks, Ingo