Bug 1334459
| Summary: | rt: Use IPI to trigger RT task push migration instead of pulling | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Marcel Kolaja <mkolaja> |
| Component: | kernel-rt | Assignee: | Luis Claudio R. Goncalves <lgoncalv> |
| kernel-rt sub component: | Process management | QA Contact: | Jiri Kastner <jkastner> |
| Status: | CLOSED ERRATA | Docs Contact: | |
| Severity: | medium | ||
| Priority: | high | CC: | bhu, lgoncalv, srostedt, williams |
| Version: | 7.3 | Keywords: | ZStream |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: |
In order to avoid thundering herd access to run-queue locks when performing task migration, a three-commit series was backported from upstream. By sending an IPI from an underutilized core to an overloaded core, requesting that the overloaded core push the task to the requesting core, the issue was avoided. The rhel-rt 7.2 and MRG kernels were missing one of the commits from the series.
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Story Points: | --- |
| Clone Of: | 1332593 | Environment: | |
| Last Closed: | 2016-06-23 16:31:00 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: | |||
| Bug Depends On: | 1332593 | ||
| Bug Blocks: | 1274397 | ||
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Description
Marcel Kolaja
2016-05-09 16:26:29 UTC
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2016:1301 |