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=-0.8 required=3.0 tests=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 1B5AAC35250 for ; Sat, 8 Feb 2020 08:36:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D5A0121775 for ; Sat, 8 Feb 2020 08:36:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726995AbgBHIgK (ORCPT ); Sat, 8 Feb 2020 03:36:10 -0500 Received: from relay1-d.mail.gandi.net ([217.70.183.193]:29495 "EHLO relay1-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726229AbgBHIgK (ORCPT ); Sat, 8 Feb 2020 03:36:10 -0500 X-Originating-IP: 66.190.246.67 Received: from localhost (66-190-246-67.dhcp.astr.or.charter.com [66.190.246.67]) (Authenticated sender: josh@joshtriplett.org) by relay1-d.mail.gandi.net (Postfix) with ESMTPSA id 63560240003; Sat, 8 Feb 2020 08:36:06 +0000 (UTC) Date: Sat, 8 Feb 2020 00:36:04 -0800 From: Josh Triplett To: Linus Torvalds Cc: linux-kernel@vger.kernel.org Subject: Applying pipe fix this merge window? Message-ID: <20200208083604.GA86051@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I've been hammering on your pipe fix patch (switching to exclusive wait queues) for a month or so, on several different systems, and I've run into no issues with it. The patch *substantially* improves parallel build times on large (~100 CPU) systems, both with parallel make and with other things that use make's pipe-based jobserver. All current distributions (including stable and long-term stable distributions) have versions of GNU make that no longer have the jobserver bug. Based on that, would you consider merging the pipe fix patch in the current merge window, giving people plenty of time to hammer on it further? - Josh Triplett