Re: Blast and data miscompare

From: Paul Mackerras
Date: Thu Nov 11 2004 - 00:06:57 EST

Jake Moilanen writes:

> Not sure if it's the same problem. But we were seeing a miscompare on
> 2.4 due to a incorrect COW happening, followed by a hardware hash hole
> w/ PPC64.
> To fix it we had to make sure that the PTE was cleared and the TLB's
> flushed before the new PTE was established.
> Martin, was this fixed on 2.6?

It can't happen on 2.6; when BenH rewrote the PTE handling in 2.6
earlier this year, this was one of the things we made sure couldn't be
a problem.

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