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Description of problem:
Booting 2.6.32-122 kernel on an AMD system gives this message:
WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 29184MB of RAM.
------------[ cut here ]------------
WARNING: at arch/x86/kernel/cpu/mtrr/cleanup.c:1092 mtrr_trim_uncached_memory+0xx
2de/0x309() (Not tainted)
Hardware name: empty
Modules linked in:
Pid: 0, comm: swapper Not tainted 2.6.32-122.el6.x86_64 #1
Call Trace:
[<ffffffff81066ee7>] ? warn_slowpath_common+0x87/0xc0
[<ffffffff81066f3a>] ? warn_slowpath_null+0x1a/0x20
[<ffffffff81bc9288>] ? mtrr_trim_uncached_memory+0x2de/0x309
[<ffffffff81bc30f2>] ? setup_arch+0x4c4/0xacb
[<ffffffff814d8ea5>] ? printk+0x41/0x44
[<ffffffff81bbdbe7>] ? start_kernel+0xdc/0x424
[<ffffffff81bbd33a>] ? x86_64_start_reservations+0x125/0x129
[<ffffffff81bbd438>] ? x86_64_start_kernel+0xfa/0x109
---[ end trace a7919e7f17c0a725 ]---
This is a system with a newer AMD processor and the fix is available upstream in 3fdbf004c1706480a7c7fac3c9d836fa6df20d7d
Version-Release number of selected component (if applicable):
2.6.32-122
How reproducible:
100% Multiple systems with Interlagos CPU's
Steps to Reproduce:
1. Boot kernel
2. dmesg
3. free
Actual results:
Kernel BUG
no memory
Expected results:
No bug
All memory available.
Additional info:
I am told this was fixed in kernel 2.6.32-130, but I don't see that Red Hat Beta has any accessible repository (RHN, Yum, etc.) where I can download updated kernels.
Please provide a link to the latest Red Hat Beta kernel after 2.6.32-130 so that I can continue testing the Beta on this new hardware.
Thanks,
Phil P.
Philip, RHEL6.1 has just been released and should resolve your problem. Please reply back if RHEL6.1 does not fix your problem and reopen this BZ.
Thanks,
P.
*** This bug has been marked as a duplicate of bug 662238 ***