Bug 172909
| Summary: | Kernel 2.6.14-1.1637_FC4smp breaks irqbalance | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Steve Snyder <swsnyder> |
| Component: | kernel | Assignee: | Dave Jones <davej> |
| Status: | CLOSED ERRATA | QA Contact: | Brian Brock <bbrock> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 4 | CC: | pfrields, wtogami, zing |
| 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: | 2006-02-03 16:57:07 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: | |||
FYI, still broken in 2.6.14-1.1644_FC4. FYI, still broken in 2.6.14-1.1653_FC4. Try with this patch: http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a= commitdiff_plain;h=fe655d3a06488c8a188461bca493e9f23fc8c448;hp=b0b623c3b22d57d 6941b200321779d56c4e79e6b or disable MSI in kernel. This patch seems to have fixed it. I left MSI enabled (the default) and rebuilt. The rebuilt 2.6.14-1.1656_FC4 kernel and the irqbalance service seem to be balancing the interrupts correctly. that patch should be in the 2.6.15 kernel in updates-testing. Can you test that too please ? This is a mass-update to all currently open kernel bugs. A new kernel update has been released (Version: 2.6.15-1.1830_FC4) based upon a new upstream kernel release. Please retest against this new kernel, as a large number of patches go into each upstream release, possibly including changes that may address this problem. This bug has been placed in NEEDINFO_REPORTER state. Due to the large volume of inactive bugs in bugzilla, if this bug is still in this state in two weeks time, it will be closed. Should this bug still be relevant after this period, the reporter can reopen the bug at any time. Any other users on the Cc: list of this bug can request that the bug be reopened by adding a comment to the bug. If this bug is a problem preventing you from installing the release this version is filed against, please see bug 169613. Thank you. Kernel 2.6.15-1.1830_FC4smp is balancing the interrupts correctly. In my view, this bug can be closed. |
From Bugzilla Helper: User-Agent: Opera/8.5 (X11; Linux i686; U; en) Description of problem: After installing the kernel-smp-2.6.14-1.1637_FC4 kernel, irqbalance no longer balances interrupts between the 4 (dual-Xeon /w hyper-threading) CPUs. The balancing worked correctly in prior kernel versions. Version-Release number of selected component (if applicable): kernel-smp-2.6.14-1.1637_FC4, irqbalance-1.12-1.18 How reproducible: Always Steps to Reproduce: 1.Install package kernel-smp-2.6.14-1.1637_FC4.i686.rpm 2.Reboot to use new kernel 3.Wait a while, then check interrupt counts via /proc/interrupt Actual Results: With 35 minutes of uptime: $ cat /proc/interrupts CPU0 CPU1 CPU2 CPU3 0: 487603 0 0 0 IO-APIC-edge timer 1: 2457 0 0 0 IO-APIC-edge i8042 7: 2 0 0 0 IO-APIC-edge parport0 8: 1 0 0 0 IO-APIC-edge rtc 9: 0 0 0 0 IO-APIC-level acpi 14: 64735 0 0 0 IO-APIC-edge ide0 169: 56014 0 0 0 IO-APIC-level aic7xxx, aic7xxx, eth0 177: 46919 0 0 0 IO-APIC-level uhci_hcd:usb1 185: 0 0 0 0 IO-APIC-level uhci_hcd:usb2 201: 5153 0 0 0 IO-APIC-level CS46XX 209: 104812 0 0 0 IO-APIC-level nvidia NMI: 0 0 0 0 LOC: 487487 487486 487485 487484 ERR: 0 MIS: 0 Expected Results: The interrupts should be balanced between the 4 CPUs (except for the eth0 interrupt). Additional info: No errors or warnings are seen in system log. # ps auxS | grep irqbalance root 1797 0.0 0.0 1556 288 ? Ss 22:26 0:00 irqbalance root 3790 0.0 0.0 3768 700 pts/1 S+ 23:09 0:00 grep irqbalance