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=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 3FF41C33CAC for ; Mon, 3 Feb 2020 12:25:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 13B0A2192A for ; Mon, 3 Feb 2020 12:25:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="TIEQPIAm" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728009AbgBCMZW (ORCPT ); Mon, 3 Feb 2020 07:25:22 -0500 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:51875 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727339AbgBCMZV (ORCPT ); Mon, 3 Feb 2020 07:25:21 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1580732720; 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: in-reply-to:in-reply-to:references:references; bh=rnhSOZrfyRptYaXvcR6IW21U5l/A6AEDfxI9feZjAvY=; b=TIEQPIAmVdzZr0tT1lydQNdr7B2//2TcnqVUzs+WxOo8KxNX0qoDUf6BH5lozIjX1xNsk7 VfjG37/cbB0hX27Bsx8oj7kz1cqZEpSPItJu2GPHp5tdelGGwOXgk1m7mrMBdfWdTc0rzJ UFK1vvK+w52hD5EpMYUDfyE0y07b/+U= Received: from mail-wr1-f72.google.com (mail-wr1-f72.google.com [209.85.221.72]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-199-WtNfqeaONfWCNl_avbI_Rw-1; Mon, 03 Feb 2020 07:25:19 -0500 X-MC-Unique: WtNfqeaONfWCNl_avbI_Rw-1 Received: by mail-wr1-f72.google.com with SMTP id x15so8124348wrl.15 for ; Mon, 03 Feb 2020 04:25:18 -0800 (PST) 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=rnhSOZrfyRptYaXvcR6IW21U5l/A6AEDfxI9feZjAvY=; b=pYmCAzUj+EPdvvLjQbcqqM0gJEATL6wutjXJyZUU727JmoNLfFSgG+bn174eRNqudN IfO8HnGcWt4Uzpvg209G88jQbXwGeZtSUdB7Yo4xl6bmduwTQSjjcVY7pE3PVGa4pt6i 9m1WNQ9eNXF6zmEQsr4LCxMbAtAe7uQ21t+TBEzi3HadkKX59jB0HKPqg4ebZtb8Ya6q ABrEBomnhxiI4S6BY3nxFai1vfwJXOXCdleCDXlJRGxrJxBs9Y991RQvSceHnNJiEtgT ukTa0NdvWNDpqyAdLCU3Y8ePgdta8LnWR3yubrwHRd78kdD2Pz44HFiKji3UpF1h9uGA 213g== X-Gm-Message-State: APjAAAVuQ6vcKZF7+GMGQjhUxYSnk/k0IuJSBpBUAs5vRY7Upxk7fo+M zdQcyci8gaktzcSg5vyU1sBxCsoViWHMDi8vyszGj8OIiCbuIElQ6fEP0QTIpIieimvegIEhUWr M/qCQYEcBIBVXELkQnIO5IV2G X-Received: by 2002:a5d:4d04:: with SMTP id z4mr9862978wrt.157.1580732717982; Mon, 03 Feb 2020 04:25:17 -0800 (PST) X-Google-Smtp-Source: APXvYqy5ghHPlkc6xYznMwtJxDFgEjOmagx2Zb7+ckF0+ETu5uHQ0dVmPuQCkSW/CyhcLslYmPrC6w== X-Received: by 2002:a5d:4d04:: with SMTP id z4mr9862941wrt.157.1580732717777; Mon, 03 Feb 2020 04:25:17 -0800 (PST) Received: from localhost.localdomain ([151.29.2.83]) by smtp.gmail.com with ESMTPSA id e22sm18968813wme.45.2020.02.03.04.25.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Feb 2020 04:25:17 -0800 (PST) Date: Mon, 3 Feb 2020 13:25:14 +0100 From: Juri Lelli To: Peter Zijlstra Cc: mingo@kernel.org, will@kernel.org, oleg@redhat.com, tglx@linutronix.de, linux-kernel@vger.kernel.org, bigeasy@linutronix.de, williams@redhat.com, bristot@redhat.com, longman@redhat.com, dave@stgolabs.net, jack@suse.com Subject: Re: [PATCH -v2 0/7] locking: Percpu-rwsem rewrite Message-ID: <20200203122514.GK8582@localhost.localdomain> References: <20200131150703.194229898@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200131150703.194229898@infradead.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On 31/01/20 16:07, Peter Zijlstra wrote: > Hi all, > > This is the long awaited report of the percpu-rwsem rework (sorry Juri). > > IIRC (I really have trouble keeping up momentum on this series) I've addressed > all previous comments by Oleg and Davidlohr and Waiman and hope we can stick > this in tip/locking/core for inclusion in the next merge. > > It has been cooked (thoroughly) in PREEMPT_RT, and not found wanting. > > Any objections to me stuffing it in so we can all forget about it properly? FWIW, backported and tested again on downstream PREEMPT_RT kernel. locktorture didn't find any problem and latencies look good. Tested-by: Juri Lelli Thanks! Juri