Messages in this thread | | | Date | Mon, 12 Jan 2004 19:08:51 +0000 | From | Daniel Drake <> | Subject | Re: NForce2, Ross Dickson's timer patch on 2.6.1 |
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Hi,
I can confirm this activity, my clock has been skewing recently, but I had not made the link myself that this started happening after I started using the APIC/IOAPIC nforce fixes.
If theres any debug info I can provide let me know. I run an AMD XP2600+ on an Abit NF7-S V2.0 motherboard.
Daniel
Jesse Allen wrote: > Hi Ross, > > I have a version of your timer patch (io_apic.c) for kernel 2.6.1. It is > attached. I have been monitoring a problem with it. It seems that with the > patch, I gain 1 seconds time over 10 minutes (roughly). So I gain about 2-3 > mintues a day. I haven't taken exact measurements, but I know it ends up about > 20 minutes difference after a week. This is not good, which would require > resetting the time often. > > I tried the 2.6.1 kernel without the timer patch. The timer is now back in PIC > mode, and interrupt 7 has the old noise. Synched the time with my watch. At > first, I noticed no gain in time over 10 minutes. However the next day, I found > it gained 1-2 seconds. Now it is about 7 seconds ahead a few days later now. > This is much better. > > So I'm left to thinking, the patch does two things, maybe one thing right, and > one possibly very wrong: > > 1) It does place the timer in APIC mode. > 2) But the timer seems to be fed extra interrupts, maybe the same that is found > on irq 7 without the patch (is this possible?) > > I remember someone making a comment which might explain the issue: > http://marc.theaimsgroup.com/?l=linux-kernel&m=107098440019588&w=2 > > I don't think the patch was much different now than it was then. So I think > there is something wrong with setting up the timer this way. I don't know if > you worked something out with Maciej. I don't know much about interrupt > controller programming so... if maybe you can explain to me anything I'm > missing. For now I've dropped the patch. > > > Jesse > > > PS: I have run with disconnect on, and without your ack patch since I got that > surpise BIOS update. No lockups have occurred in the past month, since that. So the disconnect problem is a BIOS bug. (Shuttle has not responded) > > PSS: CC me, I'm not subscribed right now. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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