From owner-freebsd-current@freebsd.org Sat May 6 02:26:44 2017 Return-Path: Delivered-To: freebsd-current@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 0187ED5F0A0 for ; Sat, 6 May 2017 02:26:44 +0000 (UTC) (envelope-from cy.schubert@komquats.com) Received: from smtp-out-no.shaw.ca (smtp-out-no.shaw.ca [64.59.134.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "Client", Issuer "CA" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id B6A17A53; Sat, 6 May 2017 02:26:43 +0000 (UTC) (envelope-from cy.schubert@komquats.com) Received: from spqr.komquats.com ([96.50.22.10]) by shaw.ca with SMTP id 6pQYds1m1ETFp6pQZdv0Fw; Fri, 05 May 2017 20:26:36 -0600 X-Authority-Analysis: v=2.2 cv=dZbw5Tfe c=1 sm=1 tr=0 a=jvE2nwUzI0ECrNeyr98KWA==:117 a=jvE2nwUzI0ECrNeyr98KWA==:17 a=kj9zAlcOel0A:10 a=tJ8p9aeEuA8A:10 a=BWvPGDcYAAAA:8 a=YxBL1-UpAAAA:8 a=6I5d2MoRAAAA:8 a=G-sPGT8-Nt-BkWzT0vMA:9 a=CjuIK1q_8ugA:10 a=oappaISLdyUA:10 a=pxhY87DP9d2VeQe4joPk:22 a=Ia-lj3WSrqcvXOmTRaiG:22 a=IjZwj45LgO3ly-622nXo:22 Received: from slippy.cwsent.com (slippy [10.1.1.91]) by spqr.komquats.com (Postfix) with ESMTPS id E2E111497; Fri, 5 May 2017 19:26:33 -0700 (PDT) Received: from slippy (localhost [127.0.0.1]) by slippy.cwsent.com (8.15.2/8.15.2) with ESMTP id v462QWOw095138; Fri, 5 May 2017 19:26:32 -0700 (PDT) (envelope-from Cy.Schubert@cschubert.com) Message-Id: <201705060226.v462QWOw095138@slippy.cwsent.com> X-Mailer: exmh version 2.8.0 04/21/2012 with nmh-1.6 Reply-to: Cy Schubert From: Cy Schubert X-os: FreeBSD X-Sender: cy@cwsent.com X-URL: http://www.cschubert.com/ To: Ngie Cooper cc: Cy Schubert , Andrey Fesenko , Kyle Evans , Alastair Hogge , Vladimir Zakharov , Ed Maste , freebsd-current , Dimitry Andric Subject: Re: make buildworld broken at r317821 (libsysdecode) In-Reply-To: Message from Ngie Cooper of "Fri, 05 May 2017 16:52:48 -0700." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Fri, 05 May 2017 19:26:32 -0700 X-CMAE-Envelope: MS4wfMolBlvv0QRGvQRmK9RA2hUfL6xoK7ljcIRUl1+QraXJaV5BW8IhsSqx3kWXb6s7Yy+zZshDOiI21pOA5gyBTE3uX43zwkKQHcFjo7/misRTz5mSwW/T MZPtSzdMYgaeavbUUl8KO0127wve65QYveWfYPMr1re/xjJtNWpz1FxaW3wiatt8QtyHRVHskTRElJKvxgvan0ca5V65UkKLlvctR8wWUe/GQ0jW58GLEHgj 4VGpplzMkVbAXE6H6RQ5W+CMq6GaTAYly7CtfbpGbcpS70iEEye9p4CBKs/gw0DjXm4dKyJB5SYQLE6/CCy8CcNwGsLunf7KpQrrMOl6bfdGv+z5CAXuWW0G +5Wo6dYASmziwnHGONuZV1+pmmU9wVVyi1/+jVO+LKyGodscG+Y= X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 06 May 2017 02:26:44 -0000 In message , Ngie Cooper writes: > On Fri, May 5, 2017 at 4:43 PM, Cy Schubert wrote: > > ... > > > You have a bad DIMM. I had this same problem on my laptop but not on my > > servers downstairs. That suggested that since all four machines were > > running the same software the difference between them was hardware. > > Replacing the memory in my laptop made this problem go away. > > > > I have a question for you. Do you use ZFS? ZFS exercises memory quite > > aggressively. I also had this problem when I replaced my UFS filesystems > > with ZFS on my testbed many moons ago. It even suffered random kernel > > panics. Here again, replacing the memory resolved the issue. > > We need more information first before saying "bad hardware" -- in > particular, was the machine overtaxed, were the input files proper, > etc? > > I'm asking because clang has a number of bugs in bugzilla where the > host ran out of memory trying to compile things and clang didn't fail > gracefully when allocating memory, handling inputs, etc. Running out of memory (physical RAM + swap) would invoke OOM. That would result in the process receiving SIGKILL not SIGSEGV. Per process limits? Possible. -- Cheers, Cy Schubert FreeBSD UNIX: Web: http://www.FreeBSD.org The need of the many outweighs the greed of the few.