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.

Created attachment 514071 [details]
Patch to pass RSDP address

Description of problem:
kdump did not work on EFI-booted machine and this problem was fixed in 6.0
by using EFI physical-mode(bz593111). But physical-mode does not work on some
firmwares, so instead of physical-mode, introduce "acpi_rsdp=" parameter to pass
ACPI RSDP address so that 2nd kernel can boot without EFI.

Version-Release number of selected component (if applicable):
kernel-2.6.32-131.0.15.el6

How reproducible:
always on some machines

Steps to Reproduce:
1.Boot system from EFI
2.Start kdump
  
Actual results:
Kdump does not wrok

Expected results:
Kdump works

Additional info:
bz681796 for kexec-tools

The patch is included in Len Brown's tree.
commit 4996c02306a25def1d352ec8e8f48895bbc7dea9
Author: Takao Indoh <indou.takao.com>
Date:   Thu Jul 14 18:05:21 2011 -0400

If need help to test it, please contact me(Takao Indoh, tindoh).
I and Fujitsu can help it.

Patch(es) available on kernel-2.6.32-176.el6

Change status to VERIFIED based on https://bugzilla.redhat.com/show_bug.cgi?id=681796#c18.

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-2011-1530.html