Bug 123068
| Summary: | Kernel IRQ Balancing is improperly disabled | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Richard Schaal <rschaal_95135> |
| Component: | kernel | Assignee: | Dave Jones <davej> |
| Status: | CLOSED ERRATA | QA Contact: | Brian Brock <bbrock> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | rawhide | CC: | pfrields |
| 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: | 2004-11-03 04:48:49 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: | |||
fixed in update. |
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040505 Description of problem: A gratuitious diff in the file linux-2.6.0-compile.patch short circuits the ability to enable or disable this feature through the kernel build process. This has been this way (WRONG) for some time, but this was the first time I was able to locate the offending patch. The patch to arch/i386/kernel/io_apic.c should be deleted altogether as there are a number of other mechanisms already available to turn this feature off. Version-Release number of selected component (if applicable): linux-2.6.5-1.326 How reproducible: Always Steps to Reproduce: 1.When building a SMP IA32 kernel, enable the Kernel IRQ balance feature 2.- discover that it is not enabled when it should be. 3. Actual Results: Kernel IRQ balance did not start up. Expected Results: Kernel IRQ balance should have started. Additional info: DELETE THIS PATCH FROM linux-2.6.0-compile.patch - It doe not effect the compilation of the kernel. diff -urNp linux-1090/arch/i386/kernel/io_apic.c linux-10000/arch/i386/kernel/io_apic.c --- linux-1090/arch/i386/kernel/io_apic.c +++ linux-10000/arch/i386/kernel/io_apic.c @@ -627,8 +627,7 @@ static int __init balanced_irq_init(void /* When not overwritten by the command line ask subarchitecture. */ if (irqbalance_disabled == IRQBALANCE_CHECK_ARCH) irqbalance_disabled = NO_BALANCE_IRQ; - if (irqbalance_disabled) - return 0; + return 0; /* disable irqbalance completely if there is only one processor online */ if (num_online_cpus() < 2) {