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Date:      Sat, 27 Jun 2009 17:02:50 -0500
From:      Nathan Whitehorn <nwhitehorn@freebsd.org>
To:        Bruce Cran <bruce@cran.org.uk>
Cc:        freebsd-ppc@freebsd.org
Subject:   Re: iBook G4 chipset failure causing segfaults?
Message-ID:  <4A46970A.3030204@freebsd.org>
In-Reply-To: <20090627071710.36c4d2a0@gluon.draftnet>
References:  <20090627071710.36c4d2a0@gluon.draftnet>

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Bruce Cran wrote:
> I've recently found that my G4 iBook is causing programs to segfault
> when they start going into swap: the effect is worse on -current but
> I'm also seeing it on 7.2. For example, if I run a program to allocate 500MB the
> system will swap out most programs since I only have 512MB RAM. After a
> while dhclient and sendmail segfault while the test program keeps
> running; I've also seen tcsh and login segfault too as I logout. I
> originally found the problem when building clangbsd, where 'as' would
> segfault when it started building the large C++ files that come with
> clang. I can run a normal buildworld so I guess this is more of a
> problem with the chipset (caused by swapping?) than a memory problem?
>
> I've run the Apple Hardware Test utility over 30 loops without any
> errors - has anyone else seen this problem, and is it likely that the
> hardware is simply starting to fail?
>
>   
More likely there's a bug in the ATA driver, or the hard disk is 
failing, and so swap is being corrupted somehow. Is there a way you 
could try swapping to a different, external drive (firewire, for 
instance), and see if the problem still exists?
-Nathan



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