Red Hat Bugzilla – Bug 193435
FC5 installer doesn't work with Memory Hole Remapping On on 4G systems
Last modified: 2008-01-19 23:38:19 EST
Description of problem:On 4G AMD64 systems the installer crashes if memory hole remapping is on. Memory hole remapping moves the IOMMU so that all 4G of RAM are available. In the MSI K8N Neo4 Platinum (Nforce4 Ultra) there are three options available in the BIOS (Advanced options under DRAM). These are Memory Hole Remapping disabled, S/W Remapping and H/W remapping. When H/W remapping is enabled the FC5 installer doesn't work. The first problem was that it said there wasn't enough disk space (I was installing on an 8G partition). It was able to continue from this point and run for awhile until it crashed. With memory hole remapping off the installer works fine. I don't know which kernel you use in the installer but if it's 2.6.14 that could be the source of the problem. There is a known bug in the IOMMU module of 2.6.14 on systems with Memory Hole Remapping on (both hardware and software remapping). The 2.6.15 kernel fixed the bug and the 2.6.16 kernel is also fine. Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: 1.Turn on Memory Hole Remapping on an NForce4 system with 4G of RAM 2.Install FC5 3. Actual results: Installer crashes Expected results: Additional info: The work around is to disable Memory Hole Remapping during the install and then reenable it when the install is done.
A new kernel update has been released (Version: 2.6.18-1.2200.fc5) based upon a new upstream kernel release. Please retest against this new kernel, as a large number of patches go into each upstream release, possibly including changes that may address this problem. This bug has been placed in NEEDINFO state. Due to the large volume of inactive bugs in bugzilla, if this bug is still in this state in two weeks time, it will be closed. Should this bug still be relevant after this period, the reporter can reopen the bug at any time. Any other users on the Cc: list of this bug can request that the bug be reopened by adding a comment to the bug. In the last few updates, some users upgrading from FC4->FC5 have reported that installing a kernel update has left their systems unbootable. If you have been affected by this problem please check you only have one version of device-mapper & lvm2 installed. See bug 207474 for further details. If this bug is a problem preventing you from installing the release this version is filed against, please see bug 169613. If this bug has been fixed, but you are now experiencing a different problem, please file a separate bug for the new problem. Thank you.
I'll be trying FC6 in the next couple of weeks. Assuming that the FC6 installer is using a new kernel I would expect this bug to have been fixed. I'll let you know.
Please see: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=229913 Which is happening on FC6 2.6.19-1.2911.fc6
(this is a mass-close to kernel bugs in NEEDINFO state) As indicated previously there has been no update on the progress of this bug therefore I am closing it as INSUFFICIENT_DATA. Please re-open if the issue still occurs for you and I will try to assist in its resolution. Thank you for taking the time to report the initial bug. If you believe that this bug was closed in error, please feel free to reopen this bug.