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=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 7CAB8C433E0 for ; Thu, 21 May 2020 17:31:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 533BC2072C for ; Thu, 21 May 2020 17:31:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=canb.auug.org.au header.i=@canb.auug.org.au header.b="ucdqsCgA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730050AbgEURb0 (ORCPT ); Thu, 21 May 2020 13:31:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55240 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726821AbgEURbZ (ORCPT ); Thu, 21 May 2020 13:31:25 -0400 Received: from ozlabs.org (ozlabs.org [IPv6:2401:3900:2:1::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 96F9AC061A0E; Thu, 21 May 2020 10:31:25 -0700 (PDT) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 49Sc9P1j80z9sPF; Fri, 22 May 2020 03:31:21 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=canb.auug.org.au; s=201702; t=1590082282; bh=U2q+9nWVu2OnlzR+r83h0Q4ydB5//CzWr/lK+sJ4gsk=; h=Date:From:To:Cc:Subject:From; b=ucdqsCgAg+h50FMDhtJYH8rDSXR7O5vYBCKjBgJQUj0OzMT6ZNB1YI2utxF+JwDVn dN6tyPCwQ/xkZmDhrW0Hv0O0x1L93r+AQnBnyZYX3S2TDyXSy53Y8Ap1sDLi2fZe9e K6ybH1fafBN4Lf27gZ2hjB4r9nSch2UUb2hgO4Qyjc/ys4cBlOLpE3RPtfRzUcZw21 nqZTv9uy8LW4cbTyi2yZ5cHpv/rjbPoWj8T4T89J1No3YLv6WDZogFTQGPwaTUaHFv CCHQX3D/A2mpMIEpjQVHeizVZFvziGLRRxHBQUUMRqqJXw1joGeDvW/yoUEh9bk/jv 8R3yzJCwQIPLQ== Date: Fri, 22 May 2020 03:31:19 +1000 From: Stephen Rothwell To: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Peter Zijlstra Cc: Linux Next Mailing List , Linux Kernel Mailing List , Will Deacon Subject: linux-next: build failure after merge of the tip tree Message-ID: <20200522033119.1bbd99c5@canb.auug.org.au> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/wrxL7s9suCEcfFWKJZTtC/p"; protocol="application/pgp-signature"; micalg=pgp-sha256 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --Sig_/wrxL7s9suCEcfFWKJZTtC/p Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Hi all, After merging the tip tree, all my linux-next builds took signficantly longer and used much more memory. In some cases, builds would seg fault due to running out of memory :-( I have eventaully bisected it to commit cdd28ad2d811 ("READ_ONCE: Use data_race() to avoid KCSAN instrumentation") For my (e.g.) x86_64 allmodconfig builds (cross compiled on PowerPC le, -j80) the elapsed time went from around 9 minutes to over 17 minutes and the maximum resident size (as reported by /usr/bin/time) from around 500M to around 2G (I saw lots of cc1 processes over 2G in size). For tomorrow's linux-next (well, later today :-() I will revert that commit (and its child) when I merge the tip tree. --=20 Cheers, Stephen Rothwell --Sig_/wrxL7s9suCEcfFWKJZTtC/p Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEENIC96giZ81tWdLgKAVBC80lX0GwFAl7GuucACgkQAVBC80lX 0GzOewf/azkhBK6A/fGfOMCMgugNIwuaoC8kaoodaK1hGp1iaXgXcHZvJ4EUOiwj lMP8BiS2IxypBpPteksM+hUjO0thTNCQ07PlnmfLXEv4JPezAZF8jCvk/ZxHaUzz ZuKA49fsQ5SDRsD10rayvwqyf7OGLTNpsvRA/kd9SxM3tjV1ayLo+4fe1YcrnjcE FYHormIYKPWT6/qkpjp60pYmV0DFWzw013dXEM75npvaiErKKrP7H+li8fjWrxJo H1Fjhuh3UtWcCkCOGxU/oCbS/EmPyZEghu1l6g9LpJzKfSSPcVs6jywL9PQ+ugZG JBqE4uKAgvyzvhAAWIp7UGwe6A7ZxQ== =7ehF -----END PGP SIGNATURE----- --Sig_/wrxL7s9suCEcfFWKJZTtC/p--