Red Hat Bugzilla – Bug 978941
Grub uses the wrong memory node
Last modified: 2014-02-05 16:59:26 EST
Description of problem:
On a system with multiple "/memory@xxx" nodes, grub misbehaves. For it's memory
allocations I observe that it does a "finddevice" call to the client interface
for the "/memory" node and then looks for the "available" property in there.
This is broken potentially on systems with several such nodes, as OF can return
any of the memory nodes. They might not all have an 'available' property and
may represent memory outside of the "RMA" which is the only area grub2 should
be allowed to access in real mode on some systems.
A typical case of that breakage is running under KVM on a 970 where the RMA
is only 256M and the rest of memory is represented in a separate node.
I have added a hack to SLOF to workaround that problem by forcing any "finddevice" of "/memory" to always return "/memory@0" instead but grub should be made smarter and either:
- Request "/memory@0"
- Iterate all memory nodes and pick up the lowest one
The latter is only needed if that code is to be used on a system which doesn't have memory starting at 0.
At least on powerpc...
Version-Release number of selected component (if applicable):
Steps to Reproduce:
This message is a reminder that Fedora 18 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 18. It is Fedora's policy to close all
bug reports from releases that are no longer maintained. At that time
this bug will be closed as WONTFIX if it remains open with a Fedora
'version' of '18'.
Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version'
to a later Fedora version prior to Fedora 18's end of life.
Thank you for reporting this issue and we are sorry that we may not be
able to fix it before Fedora 18 is end of life. If you would still like
to see this bug fixed and are able to reproduce it against a later version
of Fedora, you are encouraged change the 'version' to a later Fedora
version prior to Fedora 18's end of life.
Although we aim to fix as many bugs as possible during every release's
lifetime, sometimes those efforts are overtaken by events. Often a
more recent Fedora release includes newer upstream software that fixes
bugs or makes them obsolete.
Fedora 18 changed to end-of-life (EOL) status on 2014-01-14. Fedora 18 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.
If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version. If you
are unable to reopen this bug, please file a new report against the
current release. If you experience problems, please add a comment to this
Thank you for reporting this bug and we are sorry it could not be fixed.