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=Comment: #0=================================================
Emily J. Ratliff <emilyr.com> - 2008-09-16 17:55 EDT
1. Feature Overview:
Feature Id: [201000]
a. Name of Feature: FICON: Hyper PAV enablement
b. Feature Description
This item is to implement the Hyper-Parallel-Access-Volume support in zLinux. This is a very
flexible concept to massively improve device performance by using a set of subchannels as an ALIAS-pool.
2. Feature Details:
Sponsor: zSeries
Architectures:
s390x
Arch Specificity: Purely Arch Specific Code
Affects Kernel Modules: Yes
Delivery Mechanism: Direct from community
Category: System Storage
Request Type: Driver - Feature from IBM
d. Upstream Acceptance: Accepted
Sponsor Priority 1
f. Severity: High
IBM Confidential: no
Code Contribution: IBM code
g. Component Version Target: 2.6.25
3. Business Case
Customers will observe increased and sustained I/O performance improvements exploiting parallel
Access Volume (PAV) support for disk storage access. Supporting HyperPAV will lead to significantly
reduced configuration efforts as opposed to static PAV setups with the system dynamically self
optimizing its I/O configuration.
4. Primary contact at Red Hat:
John Jarvis
jjarvis
5. Primary contacts at Partner:
Project Management Contact:
Hans-Georg Markgraf, mgrf.com, Boeblingen 49-7031-16-3978
Technical contact(s):
Gonzalo Muelas Serrano, gmuelas.com
IBM Manager:
Thomas Schwarz, t.schwarz.com
RHEL 6 will include a kernel newer than 2.6.25, so this should not be an issue.
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
desired.
Comment 2Hans-Joachim Picht
2009-09-22 21:08:28 UTC
Code is included in the rhel6 kernel via upstream. Marked as
CLOSED/CURRENTRELEASE by Hans-Joachim Picht <hpicht>
------- Comment From mgrf.com 2010-06-08 09:56 EDT-------
This feature is verified on R6 snapshots with the following bug reported
- severity = normal
-> fix available but planned for R6.1 to achieve proper test coverage
LTC 57823 - RHBZ529362 - INFO: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
Set feature to verified. Thx