Messages in this thread | | | Date | Fri, 7 May 2010 23:46:59 +0100 | From | Alan Cox <> | Subject | Re: RFD: Should we remove the HLT check? (was Re: [PATCH 1/8] x86: avoid check hlt if no timer interrupts) |
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On Fri, 07 May 2010 15:27:34 -0700 "H. Peter Anvin" <hpa@zytor.com> wrote:
> On 05/07/2010 03:24 PM, Alan Cox wrote: > >> I'd be cool skipping it for family 5 or newer. I'm just wondering if we > >> should kill it completely -- IIRC it was only a handful of 386/486 > >> systems which had problems, usually due to marginal power supplies which > >> couldn't handle the noise of a variable load (DOS not having any power > >> management would run at a reliable 100% load) -- that's not exactly the > >> type of systems which would have survived to modern day. > > > > Also SMM and hardware bugs on some platforms - Cyrix MediaGX 5510 for > > example where a hlt at the wrong moment during ATA transfers hung the box > > until power cycle. But all old old stuff. > > I think family < 5 seems a reasonable cutoff. > > Note that the ATA transfer bug you describe above would not be caught by > the existing check.
MediaGX5510 would I'm pretty certain be 486 reporting anyway
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