Bug 463697 - [LTC 6.0 FEAT] 201725:Pre-allocated headers for HiperSockets (qeth driver)
[LTC 6.0 FEAT] 201725:Pre-allocated headers for HiperSockets (qeth driver)
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel (Show other bugs)
s390x All
high Severity high
: alpha
: 6.0
Assigned To: Hans-Joachim Picht
Martin Jenner
: FutureFeature
Depends On:
Blocks: 356741 RHEL6Kernel2.6.27
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Reported: 2008-09-24 02:50 EDT by IBM Bug Proxy
Modified: 2010-06-08 10:31 EDT (History)
3 users (show)

See Also:
Fixed In Version:
Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2009-09-22 16:57:04 EDT
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description IBM Bug Proxy 2008-09-24 02:50:49 EDT
=Comment: #0=================================================
Emily J. Ratliff <emilyr@us.ibm.com> - 2008-09-16 18:22 EDT
1. Feature Overview:
Feature Id:	[201725]
a. Name of Feature:	Pre-allocated headers for HiperSockets (qeth driver)
b. Feature Description
Provide pre-allocated qdio headers for HiperSocket devices in qeth to avoid skb copying.

2. Feature Details:
Sponsor:	zSeries

Arch Specificity: Purely Arch Specific Code
Affects Kernel Modules: Yes
Delivery Mechanism: Direct from community
Category:	Networking
Request Type:	Installer - Enhancement from IBM
d. Upstream Acceptance:	Accepted
Sponsor Priority	1
f. Severity: High
IBM Confidential:	no
Code Contribution:	IBM code
g. Component Version Target:	k2.6.27

3. Business Case
This line item will economize the reallocation of the skb data segment by allocating separate memory
for the qdio transport information (qeth header), which in turn will provide a better HiperSocket
network performance.

4. Primary contact at Red Hat: 
John Jarvis

5. Primary contacts at Partner:
Project Management Contact:
Hans-Georg Markgraf, mgrf@de.ibm.com, Boeblingen 49-7031-16-3978

Technical contact(s):
Gonzalo Muelas Serrano, gmuelas@de.ibm.com

IBM Manager:
Thomas Schwarz, t.schwarz@de.ibm.com
Comment 1 Bill Nottingham 2008-10-02 17:17:22 EDT
Did this make 2.6.27?
Comment 2 IBM Bug Proxy 2009-02-04 23:50:27 EST
(In reply to comment #4)
> Did this make 2.6.27?

Comment 3 Bill Nottingham 2009-02-05 10:43:25 EST
OK, setting as MODIFIED.

The feature requested has already been accepted into the upstream code base
planned for the next major release of Red Hat Enterprise Linux.

When the next milestone release of Red Hat Enterprise Linux 6 is available,
please verify that the feature requested is present and functioning as
Comment 4 Hans-Joachim Picht 2009-09-22 16:57:04 EDT
Code is included in the rhel6 kernel via upstream. Marked as
CLOSED/CURRENTRELEASE by Hans-Joachim Picht <hpicht@redhat.com>
Comment 5 IBM Bug Proxy 2010-06-08 10:31:40 EDT
------- Comment From mgrf@de.ibm.com 2010-06-08 10:28 EDT-------
This feature is verified on R6 snapshots
set feature to verified - Thx

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