Messages in this thread |  | | | Date | Fri, 12 Jan 2001 17:09:08 +0000 ( ) | | From | John Heil <> | | Subject | Re: ide.2.4.1-p3.01112001.patch |
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On Fri, 12 Jan 2001, Linus Torvalds wrote:
> Date: Fri, 12 Jan 2001 16:52:00 -0800 (PST) > From: Linus Torvalds <torvalds@transmeta.com> > To: John Heil <kerndev@sc-software.com> > Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>, Vojtech Pavlik <vojtech@suse.cz>, > linux-kernel@vger.kernel.org > Subject: Re: ide.2.4.1-p3.01112001.patch > > > > On Fri, 12 Jan 2001, John Heil wrote: > > > On Sat, 13 Jan 2001, Alan Cox wrote: > > > > > Date: Sat, 13 Jan 2001 00:25:28 +0000 (GMT) > > > From: Alan Cox <alan@lxorguk.ukuu.org.uk> > > > To: Linus Torvalds <torvalds@transmeta.com> > > > Cc: Vojtech Pavlik <vojtech@suse.cz>, linux-kernel@vger.kernel.org > > > Subject: Re: ide.2.4.1-p3.01112001.patch > > > > > > > what the bug is, and whether there is some other work-around, and whether > > > > it is 100% certain that it is just those two controllers (maybe the other > > > > ones are buggy too, but the 2.2.x tests basically cured their symptoms too > > > > and peopl ehaven't reported them because they are "fixed"). > > > > > > I've not seen reports on the later chips. If they had been buggy and then > > > fixed I'd have expected much unhappy ranting before the change > > > > The "fix" was an hdparm command like hdparm -X66 -m16c1d1 /dev/hda. > > Which I set for my VIA 686a on a Tyan mobo w a 1G Athlon. > > Careful. It may be that your fix just avoids the corruption because the > other changes make it ok - like the 16-sector multi-count thing maybe > hides a problem that might still exist - it just changes the "normal" > timing so that you won't ever see it in practice any more. > > These kinds of magic interactions is why I'm not at all happy about driver > changes until people really know what it was that caused it, and _know_ > that it's gone. > > Anyway, for you the problem apparently happened even on a 686a, but just > the 586 series. Correct?
Yes, initially the 686a was problematic, now with an 80 wire cable its fine.
One point of clarification... I started out with a simple hdparm -d1 which failed 85% of the time. I added the other stuff only to enhance the -d0 state I was left with.
I then changed to the 80 wire cables and retried with only -d1 again, and to my surprise, the problems never came back and DMA stayed on. A while later, I added -X66 and it too worked great. Then lastly came the re-add of the rest giving current state.
> > Linus >
----------------------------------------------------------------- John Heil South Coast Software Custom systems software for UNIX and IBM MVS mainframes 1-714-774-6952 kerndev@sc-software.com johnhscs@sc-software.com http://www.sc-software.com ----------------------------------------------------------------- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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