Note: This bug is displayed in read-only format because
the product is no longer active in Red Hat Bugzilla.
RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
=Comment: #0=================================================
Emily J. Ratliff <emilyr.com> - 2008-09-24 13:52 EDT
1. Feature Overview:
Feature Id: [201227]
a. Name of Feature: NFS over RDMA support
b. Feature Description
Remote Direct Memory Access (RDMA) allows data to move directly from the memory of one computer into
that of another without involving either one's operating system. This permits high throughput,
low-latency networking, which is especially useful in massively parallel computer clusters. NFS
over RDMA improves efficiency of write path, lowers CPU usage.
Additional Comments: Final bits made it into 2.6.25 kernel, so using that as actual code completion
date.
2. Feature Details:
Sponsor: LTC
Architectures:
x86
x86_64
ppc64
Arch Specificity: Purely Common Code
Affects Kernel Modules: Yes
Delivery Mechanism: Direct from community
Category: Networking
Request Type: Kernel - Enhancement from Upstream
d. Upstream Acceptance: Accepted
Sponsor Priority 2
f. Severity: Medium
IBM Confidential: no
Code Contribution: 3rd party code
g. Component Version Target: Kernel and nfs-utils package
3. Business Case
Some key customers are requesting to have NFS over RDMA (over iWARP/RDMA enabled Ethernet NICs)
supported to address the performance bottlenecks seen in their data center environments. This is one
of the enablers to fill-in the large 10G pipes deployed in data centers.
Benefits
NFS over RDMA offers significant performance improvements with less CPU utilizations.
4. Primary contact at Red Hat:
John Jarvis
jjarvis
5. Primary contacts at Partner:
Project Management Contact:
Sarah Wright, sarahw.com, 503-578-5145
Technical contact(s):
Frank Filz, ffilz.com
IBM Manager:
Jeffrey Heroux, heroux.com
RHEL 6 will include at least a 2.6.25 kernel, and nfs-utils-1.1.3, so this should not be a problem.
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 From iranna.ankad.com 2010-06-09 01:47 EDT-------
An update from SystemX Distro Test team:
We are still unable to verify NFS over RDMA feature on X, blocked by below bug.
Waiting for the resolution of this blocker.
Bug 64126 - RIT983903- [Infiniband]NFS over RDMA is not happening on RHEL6.
Thanks!
This appears to have been fixed by the bug mentioned in comment #4 (although the link is wrong so I don't know which bug it's really referring to). Can IBM verify that this is working with the GA release?
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.
http://rhn.redhat.com/errata/RHSA-2011-0542.html