Bug 1542450 – If IRQ disappears and reappears later the IRQ is not balanced correctly due to overflow in irq_count [rhel-7.4.z]

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Bug 1542450 - If IRQ disappears and reappears later the IRQ is not balanced correctly due to overflow in irq_count [rhel-7.4.z]

Summary:	If IRQ disappears and reappears later the IRQ is not balanced correctly due t...

Status:	VERIFIED

Aliases:	None

Product:	Red Hat Enterprise Linux 7
Classification:	Red Hat
Component:	irqbalance (Show other bugs)
Sub Component:
Version:	7.5
Hardware:	Unspecified Unspecified

Priority	urgent Severity high
Target Milestone:	rc
Target Release:	---
Assigned To:	Kairui Song
QA Contact:	Jiri Dluhos
Docs Contact:	Petr Bokoc

URL:
Whiteboard:
Keywords:	ZStream

Duplicates:	1503800 (view as bug list)
Depends On:	1536373
Blocks:	1507952 1507957
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Reported:	2018-02-06 06:30 EST by Oneata Mircea Teodor
Modified:	2018-09-25 08:39 EDT (History)
CC List:	11 users (show)

See Also:
Fixed In Version:	irqbalance-1.0.7-10.el7_4.1
Doc Type:	Bug Fix
Doc Text:	Previously, if a device disappeared and then reappeared, the "irq_count" interrupt request (IRQ) counter in irqbalance overflowed, which resulted in a failure to balance IRQs. This update adds a check which triggers a rescan of the IRQ database if the counter decreases. As a result, IRQs remain correctly balanced for disappearing and reappearing devices.
Story Points:	---
Clone Of:	1536373
Environment:
Last Closed:
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Description Oneata Mircea Teodor 2018-02-06 06:30:25 EST

This bug has been copied from bug #1536373 and has been proposed to be backported to 7.4 z-stream (EUS).

Comment 7 Kairui Song 2018-09-05 22:44:31 EDT

*** Bug 1503800 has been marked as a duplicate of this bug. ***

Comment 12 Jiri Dluhos 2018-09-25 08:39:17 EDT

Confirming that after removing and re-adding the audio driver, "irqbalance --onetime --debug" rebuilds the database (produces a list of Adding IRQ nn to database" messages).

Thanks kasong!

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