Re: Blast and data miscompare

From: Martin J. Bligh
Date: Tue Nov 09 2004 - 10:46:34 EST

--Jake Moilanen <moilanen@xxxxxxxxxxxxxx> wrote (on Tuesday, November 09, 2004 09:34:00 -0600):

>> I have tried searching on this issue, but found nothing. I heard from a
>> kernel developer at work that a memory error was discovered recently in
>> the linux 2.6 kernel that causes data miscompare errors in the generic
>> scsi driver when executing blast tests.
>> Does anyone know more about this???
> 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?

Yup, was already fixed in 2.6, and is PPC64 only. Most of those errors
tend to be caused by IO problems ...


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