Bug 1443951

Summary:	WARN_ON if work is queued on isolated CPU with app with higher FIFO priority than kworker
Product:	Red Hat Enterprise Linux 7	Reporter:	Marcelo Tosatti <mtosatti>
Component:	kernel-rt	Assignee:	Red Hat Kernel Manager <kernel-mgr>
kernel-rt sub component:	Other	QA Contact:	Red Hat Kernel QE team <kernel-qe>
Status:	CLOSED NOTABUG	Docs Contact:
Severity:	unspecified
Priority:	unspecified	CC:	bhu, kbenoit, lcapitulino, lgoncalv, williams
Version:	7.4
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-05-19 15:33:30 UTC	Type:	Bug
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:
Bug Blocks:	1175461

Description Marcelo Tosatti 2017-04-20 10:25:52 UTC

The situation is invalid in case the app does not enter the kernel 
for long periods of time, such as DPDK polling.

Add a WARN_ON() to catch those cases early, saving developer time
and support time.

Comment 2 Marcelo Tosatti 2017-05-19 15:33:30 UTC

Closing, Daniel Bristot gave a suggestion to achieve same functionality from userspace. 
Thanks Daniel!