Bug 1334459 – rt: Use IPI to trigger RT task push migration instead of pulling

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Bug 1334459 - rt: Use IPI to trigger RT task push migration instead of pulling

Summary:	rt: Use IPI to trigger RT task push migration instead of pulling

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 7
Classification:	Red Hat
Component:	kernel-rt (Show other bugs)
Sub Component:
Version:	7.3
Hardware:	x86_64 Linux

Priority	high Severity medium
Target Milestone:	rc
Target Release:	---
Assigned To:	Luis Claudio R. Goncalves
QA Contact:	Jiri Kastner
Docs Contact:

URL:
Whiteboard:
Keywords:	ZStream

Depends On:	1332593
Blocks:	1274397
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Reported:	2016-05-09 12:26 EDT by Marcel Kolaja
Modified:	2016-06-23 12:31 EDT (History)
CC List:	4 users (show)

See Also:
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.
Story Points:	---
Clone Of:	1332593
Environment:
Last Closed:	2016-06-23 12:31:00 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2016:1301	normal	SHIPPED_LIVE	Important: kernel-rt security, bug fix, and enhancement update	2016-06-23 16:15:04 EDT

Groups: None (edit)

Description Marcel Kolaja 2016-05-09 12:26:29 EDT

This bug has been copied from bug #1332593 and has been proposed
to be backported to 7.2 z-stream (EUS).

Comment 7 errata-xmlrpc 2016-06-23 12:31:00 EDT

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

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