Received: by 2002:a05:7208:9594:b0:7e:5202:c8b4 with SMTP id gs20csp1786786rbb; Tue, 27 Feb 2024 00:37:12 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCWgqcB8L/wTtCOVR104S8O8RWz4Yu2UKuCx8emMl8Q8Ie04T/SOE4VvflOT0kxmEB3W8TUwnIQSot1AdUpi1uNhNqCdUuDrGS+/wbkzoQ== X-Google-Smtp-Source: AGHT+IE4pTiVjPP1+FXXkNxDeHIjf/AgwfyOuRffrPDy8osD8pnCgga7M/yE5obuK0zPF25STG07 X-Received: by 2002:aa7:d30e:0:b0:565:bd4d:8a89 with SMTP id p14-20020aa7d30e000000b00565bd4d8a89mr5109903edq.31.1709023032054; Tue, 27 Feb 2024 00:37:12 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1709023032; cv=pass; d=google.com; s=arc-20160816; b=Sh/gHgp1yTFioh9hrdQpHTTAZMbLL8z3YX1Nyo06b74xy8c/2wnSJ/8m364JT5EJ10 RiKV9JTiEJFhVZN+T8qKOi2YtXTvHwJizYVEumrwtnbEITdDtQcRsNTAekQyBG/G43fw 7S7L4MGcEaCoI/GDgQeH42sXqY9UZIkZz/wT3klCOOty7m5doe+rwVBZvjEM8QxpVsm5 UCRYZ3rhL+1Vx/3mpiDskjwI9OToJcDblJmtZ8ygeWJlmCN5zbG+hPZtFIK6rsOckL8v /Bc6VZbaCmENjz14XHYUedA0w7NElawtGPCureNSoZ2VIv5dhZbeDMGKJfbcOASa8IAy 3Zow== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:list-unsubscribe:list-subscribe:list-id:precedence :user-agent:content-transfer-encoding:autocrypt:references :in-reply-to:date:cc:to:from:subject:message-id:dkim-signature; bh=V8Q/7QW7ULeInBjBQEsQG4XWS/a6QIwtjQY700E3RuE=; fh=tsM8d9dzPisYpe3HzzXAr7IJya/WiHsTinNkzx+QZo8=; b=MwMcodvT4HViswyndUkJuLD3C5r5smc90kLG0S0zAmw+vvcadjDBdSoVLTX355Khaf 6rKyhUCOcN7VMw1J4Bi7LVNYOCwdeYIDd231po4GGigvqVke5CLOFK6f4tndYVJbMdLh pG7f2glekGPus11nEO8EKCFssYQciLj7HzNjz+pXDe/3iBrDREtsveNs7qjrubzpyVmD f5vQYXM1RnWLw8HG9ICiIwZy/QJWzv4RhQKjc4Qu1R15eL7iquEoCysho7L+PFm7VCsf SxYG2eekSsWkuBjX0hsjG17yKglarjczJmWmyusYrKfr0P+oaWXLOg9hQOl1owAMuqGh Nvtg==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=Bb5nCDlg; arc=pass (i=1 spf=pass spfdomain=redhat.com dkim=pass dkdomain=redhat.com dmarc=pass fromdomain=redhat.com); spf=pass (google.com: domain of linux-kernel+bounces-82871-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) smtp.mailfrom="linux-kernel+bounces-82871-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Return-Path: Received: from am.mirrors.kernel.org (am.mirrors.kernel.org. [2604:1380:4601:e00::3]) by mx.google.com with ESMTPS id h7-20020a056402094700b00565d5d87a2bsi510539edz.629.2024.02.27.00.37.12 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Feb 2024 00:37:12 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-82871-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) client-ip=2604:1380:4601:e00::3; Authentication-Results: mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=Bb5nCDlg; arc=pass (i=1 spf=pass spfdomain=redhat.com dkim=pass dkdomain=redhat.com dmarc=pass fromdomain=redhat.com); spf=pass (google.com: domain of linux-kernel+bounces-82871-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) smtp.mailfrom="linux-kernel+bounces-82871-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com 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 am.mirrors.kernel.org (Postfix) with ESMTPS id DB10B1F256BD for ; Tue, 27 Feb 2024 08:36:52 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 074B9133297; Tue, 27 Feb 2024 08:36:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Bb5nCDlg" Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 74CE5537F4 for ; Tue, 27 Feb 2024 08:36:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709022990; cv=none; b=VTqA3OEREJD6wK2bp2X8Sc2ISghRJrWMiGii3fy7jfaU5EOPZJUlksmCiX7Q86vjbPrRoA0S/d2rlozX1R2IFXXTZBCo5uURIxZZ4FLzypKdHebsVZfe72r8y+ETBf3L4zn688grc/SWRePNz26kw8du88uyrkOzjlTSbEtbEyg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709022990; c=relaxed/simple; bh=wLFTM0gT3J6Y+QUR6schITJJke+c3UXPTTtLM7zsYtM=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=ruzdP9PFsw0MRFsWOsza03VOl7/JcGMqsWDX87xmGUIxK95NCwOny8G6YrHTBGoKMMC9LR10YNuHzf7kO1jXjW5IQQJ8qgKZz12PUn7kgfpjf07Tiv4rw+9HeTrotdAA9yaqcjMUo47jOgjeMPIT/xiZYRJhdfh+eZf0fD+RKrk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=Bb5nCDlg; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1709022987; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=V8Q/7QW7ULeInBjBQEsQG4XWS/a6QIwtjQY700E3RuE=; b=Bb5nCDlgyH0npgpHPuhJUB3G6UEST4GQ5EVEDqR3tfxbut4EhCw/m48grQO8F07+f3feiz zlM0O3l5oa1dV0XwVETzlOmJjNhxaHElBJBU8w/5iTuSY+UHjwx/SgaZKu53fJu3na+wzy vKW0dn3XYfyhEV3AWA9TyL3yCmUVR4k= Received: from mail-wm1-f71.google.com (mail-wm1-f71.google.com [209.85.128.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-185-xktZFL9cM0ezsfxEw0wFuw-1; Tue, 27 Feb 2024 03:36:25 -0500 X-MC-Unique: xktZFL9cM0ezsfxEw0wFuw-1 Received: by mail-wm1-f71.google.com with SMTP id 5b1f17b1804b1-412abf5cd6cso469925e9.0 for ; Tue, 27 Feb 2024 00:36:25 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1709022985; x=1709627785; h=mime-version:user-agent:content-transfer-encoding:autocrypt :references:in-reply-to:date:cc:to:from:subject:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=V8Q/7QW7ULeInBjBQEsQG4XWS/a6QIwtjQY700E3RuE=; b=rd6y//h1keUt76kvgwsPAc9l/fsmLSyRJKD1l+cCqUFySIODQNm0LiE20QL6000kIL 60QWmoFijyOGqo3kt8V8l6mTEg14qcDcZ7Ps56tXB6ybBOsQB8zHL75ALwl4d7xZLC4G ikIzIqERj8adj8hjSYJrR5eiox2F+Lid6Zjl8Ta4neN/GzXMec0mcL3mUM7dIOap9972 lYZUtLQTlZqa3OQWL3nKRx969NL9TJyKUQa9Y5YhkOoNOprBz7/jtB1SDgG6kiWoZ6O+ S3/SXZ1soLu4yiwSPwJrP6NUVJoB7CtXK+mGeLtM1ixShV8zQ4VWIf8algWCU2wU1yYZ N/lA== X-Forwarded-Encrypted: i=1; AJvYcCVSX3TRLb9OrVlBedlbrnqW/iArCgr7dp1uOygpB9MKlzvyqaJo/xMYLsRicSj+4RwwZo7VXPFiziYVGfkIwIn5VfJJEmKWE3F1XqnQ X-Gm-Message-State: AOJu0YyiXsAhSnbWxAkp2mojJ9Br5251QkN2VbVJOxanf9O/ISUfgd5T 1o54TASQT2T2n+iWeBNbVrdUIn4f6SVDsyYGb6TWNxBJ++mgHlrjLqh0QSd5vfMU1IucW5s2xny Wo2bj00DlIgRj8nPF5xx5ErlLkJd0/TIwsCIcWJqWAvtGdKlnHvjwRnUoi4b6BQ== X-Received: by 2002:a05:600c:1c05:b0:412:a1c1:2d9f with SMTP id j5-20020a05600c1c0500b00412a1c12d9fmr4476942wms.1.1709022984746; Tue, 27 Feb 2024 00:36:24 -0800 (PST) X-Received: by 2002:a05:600c:1c05:b0:412:a1c1:2d9f with SMTP id j5-20020a05600c1c0500b00412a1c12d9fmr4476935wms.1.1709022984396; Tue, 27 Feb 2024 00:36:24 -0800 (PST) Received: from gerbillo.redhat.com (146-241-245-60.dyn.eolo.it. [146.241.245.60]) by smtp.gmail.com with ESMTPSA id l4-20020a05600c4f0400b00412aeb77bbcsm618503wmq.19.2024.02.27.00.36.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Feb 2024 00:36:23 -0800 (PST) Message-ID: <35ba7c2cb75bb8141eb518c764ad8975054f0463.camel@redhat.com> Subject: Re: [PATCH net-next] net/core/dev.c: enable timestamp static key if CPU isolation is configured From: Paolo Abeni To: Marcelo Tosatti , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Jakub Kicinski , Eric Dumazet , Frederic Weisbecker , Valentin Schneider , Willem de Bruijn Date: Tue, 27 Feb 2024 09:36:22 +0100 In-Reply-To: References: Autocrypt: addr=pabeni@redhat.com; prefer-encrypt=mutual; keydata=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 7ZxN9ZsDL38qVIuFkSpgMZCiUHdxBC11J8nbBSLlpnc924UAyr5XrGA99 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 iWjoCy8L35zPqR5TV+f5WR5hTVCqmLHSgm1jxwKhPg9L+GfuE4d0SWd84y 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 sD2W1U7eyLdm/jCgticGDsRtweytsgCSYfbz0gdgUuL3EBYN3JLbAU+UZpy 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 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.4 (3.50.4-1.fc39) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Hi, On Thu, 2024-02-22 at 15:27 -0300, Marcelo Tosatti wrote: > For systems that use CPU isolation (via nohz_full), creating or destroyin= g > a socket with timestamping (SOF_TIMESTAMPING_OPT_TX_SWHW) might cause a > static key to be enabled/disabled. This in turn causes undesired > IPIs to isolated CPUs. I believe Willem is correct, the relevant flag is SOF_TIMESTAMPING_RX_SOFTWARE, see: https://elixir.bootlin.com/linux/v6.8-rc5/source/net/core/sock.c#L938 the example you used is a sort of API misuse, placing flag where a bool is expected.=20 Please send a v2 with the updated commit message, you can mention both SO_TIMESTAMPING (SOF_TIMESTAMPING_RX_SOFTWARE) and SO_TIMESTAMP. Please also include Willem in recipients list, since he gave feedback on previous version. Thanks! Paolo