Buildworld failure on stable

[Chris H]

On Wed, 26 Aug 2015 18:38:46 +0100 Matt Smith <fbsd at xtaz.co.uk> wrote

> On Aug 26 12:27, Matt Smith wrote:
> >On Aug 26 13:10, Slawa Olhovchenkov wrote:
> >>>>Hardware error or memory exhausted
> >>>
> >>>It does appear to be something along those lines. It's not memory
> >>>exhaustion as it has around 2GB free at the point it fails. However I've
> >>>deleted /usr/obj and started the buildworld again and it failed in a
> >>>different place with the same error. I'm trying it again without -j4 to
> >>>see what happens. But isn't looking too good. :(
> >>
> >>Look like hardware error.
> >>RAM/CPU/MB
> >
> >Interestingly it *always* manages to succesfully compile clang etc and 
> >it has no issues compiling things from ports. It fails compiling 
> >something from lib like openssl or kerberos.  Doesn't buildworld build 
> >a bootstrap version of clang and then use that version to compile the 
> >rest of it? I might try downgrading my sources back to the version 
> >that I last succesfully compiled just to prove it one way or the other 
> >to myself.
> >
> 
> So, been doing some testing. It looks like a -j4 problem with the latest 
> sources. If I buildworld with -j1 then it compiles with no issues at 
> all. If I compile r286908 with -j4 then it compiles with no issues at 
> all. If I try and compile r287155 with -j4 then I get the bus errors. So 
> I'm not convinced at all that it's hardware related at the moment.
Not saying it is. But it still could be a region of CPU cache that
never got exercised, or in the right (same) manner.
Maybe use a CPU/RAM test program, just to be sure?

--Chris
> 
> -- 
> Matt
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