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Bug 1013504

Summary:	change kernel crashkernel=auto logic in RHEL7 to not scale memory based on physical memory present in the system
Product:	Red Hat Enterprise Linux 7	Reporter:	Baoquan He <bhe>
Component:	kexec-tools	Assignee:	Baoquan He <bhe>
Status:	CLOSED NOTABUG	QA Contact:	Red Hat Kernel QE team <kernel-qe>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	7.0	CC:	qcai, ruyang
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-11-04 08:10:40 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:

Description Baoquan He 2013-09-30 08:50:32 UTC

Description of problem:
Currently in rhel7, cyclic mode is set by default in makedumpfile. We need to rewrite memory requirement bits section completely as now with cyclic mode we will not append 2 bits per physical page logic and it's obsolete.

That means we should change kernel crashkernel=auto logic in rhel7 to not scale memory based on physical memory present in the system.

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Comment 1 Dave Young 2013-11-04 08:10:40 UTC

Per discussion in kdump team. Let's keep the original logic, because for large memory machine adding a bit crash memory will probably improve the speed. Also there's could require more memory if multiple-cpu is supported in future.