Date: Tue, 10 Aug 2004 19:06:44 -0300 From: =?ISO-8859-1?Q?Jo=E3o_Carlos_Mendes_Lu=EDs?= <jonny@jonny.eng.br> To: freebsd-hackers@freebsd.org Subject: Realtime memory testing - Was: Re: how to logically disable memory Message-ID: <411946F4.7030508@jonny.eng.br> In-Reply-To: <20040810111749.GA48836@grummit.biaix.org> References: <20040809094325.6F8D443D1F@mx1.FreeBSD.org> <20040810111749.GA48836@grummit.biaix.org>
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Porting is probably not an option, since the memory managers are
very different. But the same idea could be applied.
Indeed, in my college times, I had a class about memory testing
procedures, and had an idea to patch the FreeBSD kernel to do realtime
memory tests and lock bad memory. This way, the system would be a lot
more stable, even with bad hardware (common in poor countries like Brasil).
The solution is probably near the VM core. At that time I was
thinking in changing the page mapper, but now I know this would just
make the system more i386 specific, and the solution could be
architecture generic.
No, unfortunatly I never let this idea grow into a solution.
Probably because I never got the guts to fully understand the FreeBSD VM
engine. ;-)
Joan Picanyol wrote:
> * Danny Braniss <danny@cs.huji.ac.il> [20040809 11:42]:
>
>>is there an 'easy' way to mark some memory as unusable? thanks,
>
>
> Linux has BadRAM: http://rick.vanrein.org/linux/badram/index.html, I
> think someone was thinking of porting it to FreeBSD... (or maybe it was
> you ;)
>
> qvb
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