On Dec 15, 9:12 am, a?n?g?...@[EMAIL PROTECTED]
(The little
lost angel) wrote:
> On Thu, 13 Dec 2007 16:35:26 -0800 (PST), Robert Myers
>
> <rbmyers...@[EMAIL PROTECTED]
> wrote:
> >A number of assertions have been made here about the AMD TLB L3 Bug:
>
> >1. Only affects virtualization.
>
> >2. Is fixed in 64-bit Linux without a significant performance hit.
>
> >1. TRUTH: AMD, which knew about the bug before the chip was released,
> >falsely made this claim. The bug apparently affects all workloads,
> >potentially resulting in a system freeze.
>
> >2. TRUTH: A fix is available under NDA for RHEL 4 and not otherwise
> >apparently.
>
> A number of assertions have been made here by Mr Myers about the AMD
> TLB L3 Bug:
>
> 1. That a fix is available under NDA for RHEL 4 and not otherwise
> apparently.
>
> Truth: Mr Myers, which knew about the openly released fix before the
> post was released, falsely made this claim. The fix apparently is
> available for all, not requiring a NDA that could potentially result
> in an information freeze.
>
> Truth : AMD released the fix publicly without a NDA requirement on 5
> Dec, do***ented on the same day by the same website used by Mr Myers
> to cite the two truths above, 8 days before Mr Myer's posting on 13
> Dec... ;)
>
>
http://www.techre****t.com/discussions.x/13742https://www.x86-64.org/pipermail/discuss/2007-December/010260.html
>
As I'm sure you know, I wasn't aware of the follow-up article.
Somewhere, there might be a customer who matters who would apply such
an "invasive" patch without sup****t. Who or where that customer might
be is beyond my imagining, except that someone im****tant must have a
bunch of these AMD chips installed somewhere and has no choice but to
take the chance. So,
1. We rushed a chip into production and missed an infrequently-
occurring but potentially disastrous bug.
2. We are now ru****ng out a patch that pur****ts to fix the bug without
a serious penalty. We told you to trust us about the chip, and it
turns out you shouldn't have. Now we're telling you *not* to trust us
about the patch. Why, exactly, would anyone install the unsup****ted
patch? Presumably there is a handful of im****tant customers whose
hands are being held. For everyone else, it's just PR.
Robert.
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