=Comment: #0================================================= Emily J. Ratliff <ratliff.com> - 1. Feature Overview: Feature Id: [200790] a. Name of Feature: Kernel NSS support - kernel part b. Feature Description This item comprises modifications to the boot loader code contained in zIPL and the kernel, as well as to the kernel parameter parsing code. The boot loaders shall convert the z/VM "parm" arguments into a parsable string and add those to the kernel parameter area. The kernel will interpret an addition parameter which will direct it to save itself into a named saved segment. --- This request comprises the kernel update required for this feature 2. Feature Details: Sponsor: zSeries Architectures: s390x Arch Specificity: Purely Arch Specific Code Affects Core Kernel: Yes Delivery Mechanism: Backport Category: zSeries Request Type: Kernel - Enhancement from IBM d. Upstream Acceptance: Accepted Sponsor Priority 1 f. Severity: High IBM Confidential: no Code Contribution: IBM code g. Component Version Target: 2.6.21 3. Business Case Save main memory when running multiple Linux servers with the same kernel in the sam z/VM system. Speed up boot process. Benefits Allows to boot Linux out of a named saved segment. 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
Created attachment 329797 [details] linux-2.6.18-s390-kernel_nss.patch
reassigning to Hans as he will be doing this work.
The patch has been posted to rhkernel on Feb 12. by Hans-Joachim Picht <hpicht>
Thanks Hans!
Updating PM score.
Please do not forget to update documentation and/or release notes (as mentioned in eSDT call): Through an NSS, z/VM makes operating system code in shared real memory pages available to z/VM guest virtual machines. Multiple Linux guest operating systems on the z/VM can then boot from the NSS and run from the single copy of the Linux kernel in memory. More details under: ??? ???Shared kernel support??? in latest version of Device Drivers, Features, and Commands at: http://www.ibm.com/developerworks/linux/linux390/development_documentation.html
This enhancement request was evaluated by the full Red Hat Enterprise Linux team for inclusion in a Red Hat Enterprise Linux minor release. As a result of this evaluation, Red Hat has tentatively approved inclusion of this feature in the next Red Hat Enterprise Linux Update minor release. While it is a goal to include this enhancement in the next minor release of Red Hat Enterprise Linux, the enhancement is not yet committed for inclusion in the next minor release pending the next phase of actual code integration and successful Red Hat and partner testing.
in kernel-2.6.18-138.el5 You can download this test kernel from http://people.redhat.com/dzickus/el5 Please do NOT transition this bugzilla state to VERIFIED until our QE team has sent specific instructions indicating when to do so. However feel free to provide a comment indicating that this fix has been verified.
~~ Attention Partners RHEL 5.4 Partner Alpha Released! ~~ RHEL 5.4 Partner Alpha has been released on partners.redhat.com. There should be a fix present that addresses this particular request. Please test and report back your results here, at your earliest convenience. Our Public Beta release is just around the corner! If you encounter any issues, please set the bug back to the ASSIGNED state and describe the issues you encountered. If you have verified the request functions as expected, please set your Partner ID in the Partner field above to indicate successful test results. Do not flip the bug status to VERIFIED. Further questions can be directed to your Red Hat Partner Manager. Thanks!
~~ Attention - RHEL 5.4 Beta Released! ~~ RHEL 5.4 Beta has been released! There should be a fix present in the Beta release that addresses this particular request. Please test and report back results here, at your earliest convenience. RHEL 5.4 General Availability release is just around the corner! If you encounter any issues while testing Beta, please describe the issues you have encountered and set the bug into NEED_INFO. If you encounter new issues, please clone this bug to open a new issue and request it be reviewed for inclusion in RHEL 5.4 or a later update, if it is not of urgent severity. Please do not flip the bug status to VERIFIED. Only post your verification results, and if available, update Verified field with the appropriate value. Questions can be posted to this bug or your customer or partner representative.
Release note added. If any revisions are required, please set the "requires_release_notes" flag to "?" and edit the "Release Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: Through a Named Saved Segment (NSS), z/VM makes operating system code in shared real memory pages available to z/VM guest virtual machines. Multiple Red Hat Enterprise Linux guest operating systems on the z/VM can then boot from the NSS and run from a single copy of the Linux kernel in memory.
------- Comment From gmuelas.com 2009-07-09 10:23 EDT------- Red Hat, this FEAT is blocked by: LTC Bug 54078 - RIT309056-Shared Kernel support is not configured Please fix ASAP, so that we can verify it. Thank you, Gonzalo Muelas Serrano.
~~ Attention Partners - RHEL 5.4 Snapshot 1 Released! ~~ RHEL 5.4 Snapshot 1 has been released on partners.redhat.com. If you have already reported your test results, you can safely ignore this request. Otherwise, please notice that there should be a fix available now that addresses this particular request. Please test and report back your results here, at your earliest convenience. The RHEL 5.4 exception freeze is quickly approaching. If you encounter any issues while testing Beta, please describe the issues you have encountered and set the bug into NEED_INFO. If you encounter new issues, please clone this bug to open a new issue and request it be reviewed for inclusion in RHEL 5.4 or a later update, if it is not of urgent severity. Do not flip the bug status to VERIFIED. Instead, please set your Partner ID in the Verified field above if you have successfully verified the resolution of this issue. Further questions can be directed to your Red Hat Partner Manager or other appropriate customer representative.
Release note updated. If any revisions are required, please set the "requires_release_notes" flag to "?" and edit the "Release Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. Diffed Contents: @@ -1,2 +1 @@ -Through a Named Saved Segment (NSS), z/VM makes operating system code in shared real memory pages +Utilizing Named Saved Segments (NSS), the z/VM hypervisior makes operating system code in shared real memory pages available to z/VM guest virtual machines. With this update, Multiple Red Hat Enterprise Linux guest operating systems on the z/VM can boot from the NSS and be run from a single copy of the Linux kernel in memory.-available to z/VM guest virtual machines. Multiple Red Hat Enterprise Linux guest operating systems on the z/VM can then boot from the NSS and run from a single copy of the Linux kernel in memory.
------- Comment From mgrf.com 2009-08-03 03:44 EDT------- Verified on RHEL 5.4 snapshots - closing feature Thx
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-2009-1243.html