Bug 720986 – vlapic: backport EOI fast path

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Bug 720986 - vlapic: backport EOI fast path

Summary:	vlapic: backport EOI fast path

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 5
Classification:	Red Hat
Component:	kernel-xen (Show other bugs)
Sub Component:
Version:	5.7
Hardware:	Unspecified Unspecified

Priority	low Severity medium
Target Milestone:	rc
Target Release:	---
Assigned To:	Paolo Bonzini
QA Contact:	Virtualization Bugs
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:	514490 KernelXenUpstreamHV
	Show dependency tree / graph

Reported:	2011-07-13 09:08 EDT by Paolo Bonzini
Modified:	2012-02-20 22:44 EST (History)
CC List:	6 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2012-02-20 22:44:57 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2012:0150	normal	SHIPPED_LIVE	Moderate: Red Hat Enterprise Linux 5.8 kernel update	2012-02-21 02:35:24 EST

Groups: None (edit)

Comment 1 Laszlo Ersek 2011-07-13 13:24:54 EDT

Paolo posted
http://post-office.corp.redhat.com/archives/rhkernel-list/2011-July/msg00610.html

Comment 2 RHEL Product and Program Management 2011-08-04 00:09:30 EDT

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.

Comment 4 Jarod Wilson 2011-08-23 10:05:50 EDT

Patch(es) available in kernel-2.6.18-282.el5
You can download this test kernel (or newer) from http://people.redhat.com/jwilson/el5
Detailed testing feedback is always welcomed.

Comment 6 Qin Guan 2011-12-28 22:19:48 EST

Verify this problem with 2.6.18-301.el5.

To test the kernel build time:
1. Install a host with kernel-xen 2.6.18-301.el5, and boot with the xen kernel
2. build kernel with the src rpm for three times and record the time:
# time rpmbuild -bb --target=x86_64 kernel.spec
3. downgrade the kernel to RHEL5.7 released kernel (2.6.18-274.el5)
4. repeat step 2

It uses less time after the fix, below is the result:

Step 2 (after):
real        56m7.636s          user        79m48.695s          sys        15m58.556s
real        53m39.934s        user        79m53.972s          sys        16m9.361s
real        52m45.541s        user        79m53.576s          sys        16m31.394s

Step 4 (before):
real        60m27.100s         user        84m13.988s          sys        13m50.640s
real        61m28.617s         user        84m22.500s          sys        14m1.193s
real        60m44.717s         user        84m21.696s          sys        13m58.276s

Comment 7 errata-xmlrpc 2012-02-20 22:44:57 EST

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.

http://rhn.redhat.com/errata/RHSA-2012-0150.html

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