Date: Fri, 05 May 2017 19:26:32 -0700 From: Cy Schubert <Cy.Schubert@komquats.com> To: Ngie Cooper <yaneurabeya@gmail.com> Cc: Cy Schubert <Cy.Schubert@komquats.com>, Andrey Fesenko <f0andrey@gmail.com>, Kyle Evans <kevans91@ksu.edu>, Alastair Hogge <agh@fastmail.fm>, Vladimir Zakharov <zakharov.vv@gmail.com>, Ed Maste <emaste@freebsd.org>, freebsd-current <freebsd-current@freebsd.org>, Dimitry Andric <dim@freebsd.org> Subject: Re: make buildworld broken at r317821 (libsysdecode) Message-ID: <201705060226.v462QWOw095138@slippy.cwsent.com> In-Reply-To: Message from Ngie Cooper <yaneurabeya@gmail.com> of "Fri, 05 May 2017 16:52:48 -0700." <CAGHfRMD=TCdQkJ54rKquDMj9z2jLOAK71p%2BthWg22Rb1K%2B-W0Q@mail.gmail.com>
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In message <CAGHfRMD=TCdQkJ54rKquDMj9z2jLOAK71p+thWg22Rb1K+-W0Q@mail.gmail.c om> , Ngie Cooper writes: > On Fri, May 5, 2017 at 4:43 PM, Cy Schubert <Cy.Schubert@komquats.com> 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 <Cy.Schubert@cschubert.com> FreeBSD UNIX: <cy@FreeBSD.org> Web: http://www.FreeBSD.org The need of the many outweighs the greed of the few.
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