Bug 80709
| Summary: | HTB packet scheduler works incorectly with HZ other than 100 or 1024 | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | Mindaugas Riauba <mindaugas> |
| Component: | kernel | Assignee: | Arjan van de Ven <arjanv> |
| Status: | CLOSED ERRATA | QA Contact: | Brian Brock <bbrock> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.3 | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2003-06-07 19:40:02 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: | |||
ought to be fixed in current erratum |
Description of problem: HTB packet scheduler works not correctly when HZ is other than 100 or 1024. RedHat's default is 512. And problem appears only with UDP traffic. TCP is shaped OK. Version-Release number of selected component (if applicable): kernel-smp-2.4.18-18.7.x How reproducible: 100% Steps to Reproduce: 1. Setup traffic shaping with HTB class. 2. Flood link with UDP traffic. Actual results: Traffic exceeds set limit or even is not shaped at all. Expected results: Shaped traffic. Additional info: At least in include/net/pkt_sched.h there is the following code: #if HZ == 100 #define PSCHED_JSCALE 13 #elif HZ == 1024 #define PSCHED_JSCALE 10 #else #define PSCHED_JSCALE 0 #endif