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 X-Spam-Level: X-Spam-Status: No, score=-3.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 85B21C4742C for ; Mon, 2 Nov 2020 15:41:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 484EA2415A for ; Mon, 2 Nov 2020 15:41:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="U9k+/cns" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726606AbgKBPll (ORCPT ); Mon, 2 Nov 2020 10:41:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60060 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726591AbgKBPli (ORCPT ); Mon, 2 Nov 2020 10:41:38 -0500 Received: from mail-ej1-x643.google.com (mail-ej1-x643.google.com [IPv6:2a00:1450:4864:20::643]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5A4A0C0617A6 for ; Mon, 2 Nov 2020 07:41:38 -0800 (PST) Received: by mail-ej1-x643.google.com with SMTP id s25so5566362ejy.6 for ; Mon, 02 Nov 2020 07:41:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=VYvv4AKgonyBQR0AjmRQ1lEVfkpg+eFpgAy6ueRaH/s=; b=U9k+/cnsKgj56ma6tcphOczg/l0x7T2HvpaGeQ6XvxR1LFnP7uTZkFKp3ppbhSjoJ0 XsD2abKQk09EPhDVoheSatotpCH6fMvY1VOAiaZWZb6CAOMMPavEMdbOhrk9PNGfpwzJ oQ3CaoVriezjN0iqLNg7dwSkAGX4/+/OE4Fv50CZtnurknT26UhYnSQUUrUQA99ddze2 kyiWFC/LzT6RiFYQtIe2LFRV86uHPNYIZIBltjhfJRrVeJFv7d0wRKSoi2lDcJ4we36U RP8TNLy0R8k4V3Nblgi6God+lwlTHb6YW8zox/S6oM+hsMJfVYnKJ643EBHZVyP+Sd03 vjGw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=VYvv4AKgonyBQR0AjmRQ1lEVfkpg+eFpgAy6ueRaH/s=; b=DTil5kjlOS7jUP5Y3nNfbjEkrWguF+fX3UAz2UYiP7gPi5TZcm5tGY/gmoprIyYz1F A3za6ggJNixQociSjJyUVVb0elCRNRKOrEYTfrjDklL6ByU42+kXCTp7+5GuRfvDnaYn FOfQzmFjL3WT/O/dl3a5gOp3MVIQs0us6+BuXAAje9naG/BD4HlsdIr892woxIf3RrYT aYWhLRcxRSWzsd7R7NuUwUBPQnW2T06sj5q1ekuRGCN5nAfw6DOvwBKrqyvtSzrAqnkz 67V7/Foz2Ku8YFn/cid+ht/UlLQzw05TjQGJ8kIjTmFJWqtKige3i11/cOn97RFwf6O5 dHlw== X-Gm-Message-State: AOAM533eqMbF9mhGypXM6s+QdSuw0zgPPJhrrsH7XTWMR6U8iUx/WAWx GJFCS+uFAsZlIDwVTCornZo= X-Google-Smtp-Source: ABdhPJxJcngr7cgxF/Df/LsTGsBJ4eQ2uKTUklTaLGIOYRHZ+aDEWPHH+dig5FmTGnYRGVtb082MCg== X-Received: by 2002:a17:906:b18f:: with SMTP id w15mr16593976ejy.137.1604331696609; Mon, 02 Nov 2020 07:41:36 -0800 (PST) Received: from skbuf ([188.25.2.177]) by smtp.gmail.com with ESMTPSA id j20sm10536387edt.4.2020.11.02.07.41.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Nov 2020 07:41:33 -0800 (PST) Date: Mon, 2 Nov 2020 17:41:32 +0200 From: Vladimir Oltean To: Heiner Kallweit Cc: Jakub Kicinski , David Miller , Realtek linux nic maintainers , "netdev@vger.kernel.org" Subject: Re: [PATCH net-next] r8169: set IRQF_NO_THREAD if MSI(X) is enabled Message-ID: <20201102154132.gfcd5t5fo4oupmre@skbuf> References: <446cf5b8-dddd-197f-cb96-66783141ade4@gmail.com> <20201102000652.5i5o7ig56lymcjsv@skbuf> <20201102124159.hw6iry2wg4ibcggc@skbuf> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Mon, Nov 02, 2020 at 04:18:07PM +0100, Heiner Kallweit wrote: > According to my understanding the point is that executing the simple > hard irq handler for NAPI drivers doesn't cost significantly more than > executing the default hard irq handler (irq_default_primary_handler). > Therefore threadifying it means more or less just overhead. If that is really true, then sure. You could probably run a cyclictest under a ping flood just to make sure though.