Bug 121383
| Summary: | Severe time drift with SMP kernel | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Alejandro Mota <mota> | ||||||
| Component: | kernel | Assignee: | Arjan van de Ven <arjanv> | ||||||
| Status: | CLOSED WORKSFORME | QA Contact: | Brian Brock <bbrock> | ||||||
| Severity: | medium | Docs Contact: | |||||||
| Priority: | medium | ||||||||
| Version: | rawhide | CC: | alan | ||||||
| Target Milestone: | --- | ||||||||
| Target Release: | --- | ||||||||
| Hardware: | i686 | ||||||||
| OS: | Linux | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||||
| Doc Text: | Story Points: | --- | |||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2004-05-15 23:31:58 UTC | Type: | --- | ||||||
| Regression: | --- | Mount Type: | --- | ||||||
| Documentation: | --- | CRM: | |||||||
| Verified Versions: | Category: | --- | |||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||
| Embargoed: | |||||||||
| Attachments: |
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Does the option "acpi=off" make a difference here. Also can you attach your boot up log of the problem system. Could well be a victim of the HZ=1000 stuff in 2.6 Are you running ntp ? Created attachment 99924 [details]
Default SMP boot log.
Created attachment 99925 [details]
Default SMP boot log.
When I boot the machine with acpi=off, the kernel starts to boot, then it
prints the following messages:
ACPI: ACPI tables contain no PCI IRQ routing entries
PCI: Invalid ACPI-PCI IRQ routing table
and then it hard locks.
If I pass the option noapic to the kernel, it seems to work fine. I haven't
tried pci=noapic, which is an option I saw in an LKML email.
The situation happens regardless of whether I use NTP or not.
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From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040211 Firefox/0.8 Description of problem: When using the SMP kernel on a Pentium 4 HT machine, a severe time drift around 1/2 hour per day happens. The drift increases significantly when running any application that uses alsa, to around 5-10 minutes per hour. In both cases the clock runs faster than normal. This drift does not happen with the UP kernel. Version-Release number of selected component (if applicable): at least kernel-smp-2.6.4-1.300 to kernel-smp-2.6.5-1.332 How reproducible: Always Steps to Reproduce: 1. Boot with SMP kernel 2. Do nothing or run any program. 3. Using programs that require ALSA increases drift. Actual Results: Drift is quickly apparent by comparing the clock with an accurate clock. Expected Results: Clock should be accurate withing milliseconds, as it happens with the UP kernel. Additional info: This problem did not occur with the 2.4 kernels, both UP and SMP. Machine is a Sager 5690 notebook, Pentium 4 HT 3.2 GHz, Intel i865PE+ICH5 chipset, Intel 82801EB/ER AC'97 audio.