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 9069BC433F5 for ; Tue, 1 Mar 2022 18:58:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237206AbiCAS7U (ORCPT ); Tue, 1 Mar 2022 13:59:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35364 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237184AbiCAS7L (ORCPT ); Tue, 1 Mar 2022 13:59:11 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id AAD8410D1 for ; Tue, 1 Mar 2022 10:58:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1646161107; 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; bh=kFGZgdXGLGnwvZ+1z11nI3m8EaJ5DlrV2FeYU+AyTr8=; b=GQFCwH2TKH/g3WabtuAGVHx1YgcYLBdqwEqUKUJO0Du3cJd/3eZ48aHqnBI6gYqyTuZOqE tVIzw75Z+M1GjdmBkUO66fm3EOM8jq6wFn0/hmbO0AoPcjSV81eFxew9EnOs+e0HUJu5n7 bvWKkrL8YenLViXMTC2bn/QAcqMz5KA= Received: from mail-ed1-f71.google.com (mail-ed1-f71.google.com [209.85.208.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-613-YYwmTz9rM8-C8yNqKSyWpQ-1; Tue, 01 Mar 2022 13:58:26 -0500 X-MC-Unique: YYwmTz9rM8-C8yNqKSyWpQ-1 Received: by mail-ed1-f71.google.com with SMTP id j9-20020a056402238900b004128085d906so8224813eda.19 for ; Tue, 01 Mar 2022 10:58:25 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=kFGZgdXGLGnwvZ+1z11nI3m8EaJ5DlrV2FeYU+AyTr8=; b=d/7RL0GF5xE0aFe0zbtzcXuW+CdaKhL1aeUoa3YGN161htrahaj+c+1GmwSbGrPxP4 NKyEfXnQWGjS1FnJieTL6EksdZOgERMXQGkwbVwsgfNubW/8mH/gMdPFBvl/B8gSu/tL 9OzJDBQgIkBZ0xT6nZXhg4EHHXN/YSAAT3Ca2eyBQZaVaE1IsckrFP+DWalAAqAoNzDR 6YbAVL02lV/Hvx//COSuIcWcUii33F2HJCkidsbdcm7OcejP0WIShuhrHzjuO8rcPkMn 3C++RezfWlqGYwAPNurah+8dNcftfvQjuGUTk4sFOZYerF1CGt0VD0S342ncJ+3qbfCA 0TuQ== X-Gm-Message-State: AOAM5326R2LcXdnOdBVg2ZYLNs/gcgr/o0vKE0DayPMFbGLk8Ga0WKtw n657/L3FZGRUw3jT0P352REK2WlCmYTtwus3XhrRfCkt3GtZq8wczIHKyrM0d3EIo5jG6hVveh2 LmjZ0ZA7IBfm+dRYsd1GDTeNs X-Received: by 2002:a17:906:6547:b0:6bd:e2ad:8c82 with SMTP id u7-20020a170906654700b006bde2ad8c82mr20029225ejn.693.1646161104901; Tue, 01 Mar 2022 10:58:24 -0800 (PST) X-Google-Smtp-Source: ABdhPJxoxm0y9DtCYhMH0XDokdx9OLF6FczI4F7yXrDG+1LbabKaLiDeGT+H7vClwVfb8jEpkf/C6Q== X-Received: by 2002:a17:906:6547:b0:6bd:e2ad:8c82 with SMTP id u7-20020a170906654700b006bde2ad8c82mr20029210ejn.693.1646161104720; Tue, 01 Mar 2022 10:58:24 -0800 (PST) Received: from [10.0.0.45] (host-95-232-30-176.retail.telecomitalia.it. [95.232.30.176]) by smtp.gmail.com with ESMTPSA id k19-20020a1709062a5300b006c75a94c587sm5581585eje.65.2022.03.01.10.58.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 01 Mar 2022 10:58:24 -0800 (PST) Message-ID: Date: Tue, 1 Mar 2022 19:58:23 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: [PATCH v2 2/2] tracing: Avoid isolated CPUs when queueing fsnotify irqwork Content-Language: en-US To: Nicolas Saenz Julienne , mingo@redhat.com, peterz@infradead.org, frederic@kernel.org, rostedt@goodmis.org Cc: tglx@linutronix.de, mtosatti@redhat.com, linux-kernel@vger.kernel.org References: <20220301113053.141514-1-nsaenzju@redhat.com> <20220301113053.141514-2-nsaenzju@redhat.com> From: Daniel Bristot de Oliveira In-Reply-To: <20220301113053.141514-2-nsaenzju@redhat.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/1/22 12:30, Nicolas Saenz Julienne wrote: > There isn't any need for this irq_work to be run locally, so avoid doing > so when the CPU is isolated. > > Note that this is especially bad as queueing it into a local isolated > CPU might add noise to what was meant to be traced in the first place. > > Signed-off-by: Nicolas Saenz Julienne Reviewed-by: Daniel Bristot de Oliveira -- Daniel