Bug 426202

Summary:	Make Xenoprof flush samples when it is stopped
Product:	Red Hat Enterprise Linux 5	Reporter:	Markus Armbruster <armbru>
Component:	kernel-xen	Assignee:	Markus Armbruster <armbru>
Status:	CLOSED WONTFIX	QA Contact:	Martin Jenner <mjenner>
Severity:	low	Docs Contact:
Priority:	low
Version:	5.1	CC:	clalance, xen-maint
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	Bug Fix
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Clone Of:		Environment:
Last Closed:	2009-01-22 12:30:49 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Markus Armbruster 2007-12-19 09:38:45 UTC

xen-unstable changeset 16612 might be useful.  Exact impact is unclear.

changeset:   16612:8aa377fb1b1f
user:        Keir Fraser <keir.fraser>
date:        Fri Dec 14 10:25:00 2007 +0000
files:       xen/common/xenoprof.c
description:
xenoprof: flush remaining smples when sampling is stopped.

Xenoprof notifies guest kernel via VIRQ_XENOPROF when sampled.
But it does coarsly based on heuristic so that sometimes VIRQ_XENOPROF
isn't delivered resulting in that oprofile daemon collects no sample.
To avoid that situation, always send VIRQ_XENOPROF when sampling is
stopped.

Signed-off-by: Isaku Yamahata <yamahata.jp>

Comment 1 RHEL Program Management 2008-06-09 21:59:35 UTC

This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
release.