[Bug 459723] Re: WARNING: at /build/buildd/linux-2.6.31/arch/x86/kernel/cpu/mtrr/generic.c:456 generic_get_mtrr+0x11e/0x140()

[Mr Canis]

Hi all,

I upgraded from 9.10, latest patch status, to 10.04 via update-manager.
It's a virtual machine, powered by VMware Workstations 7.1 hosted on a
Dell Inspiron 6400 running Ubuntu 10.04.

- Upgrade procedure runs flawless, except that the upgrade procedure didn't recognize that there is already Grub2 installed. After
  I selected "Keep current configuration...", I got a message that it could be that the actual grub configuration won't be able to 
  handle the installation. However the system was booting fine -  no errors etc.
- I tried to recompile the VMware Tools, but there I got the first time the message regarding to the mtrr.
- I re-installed the VMware Tools (that's without compiling) and it seems that the VMware Tools since then working fine.
- But in /var/log/dmesg I found this:

[    0.000000] MTRR variable ranges enabled:
[    0.000000]   0 base 0000000000 mask 00C0000000 write-back
[    0.000000]   1 disabled
[    0.000000]   2 disabled
[    0.000000]   3 disabled
[    0.000000]   4 disabled
[    0.000000]   5 disabled
[    0.000000]   6 disabled
[    0.000000]   7 disabled
[    0.000000] PAT not supported by CPU.
[    0.000000] ------------[ cut here ]------------
[    0.000000] WARNING: at /build/buildd/linux-2.6.32/arch/x86/kernel/cpu/mtrr/generic.c:467 generic_get_mtrr+0xeb/0x100()
[    0.000000] Hardware name: VMware Virtual Platform
[    0.000000] mtrr: your BIOS has set up an incorrect mask, fixing it up.
[    0.000000] Modules linked in:
[    0.000000] Pid: 0, comm: swapper Not tainted 2.6.32-23-generic #37-Ubuntu
[    0.000000] Call Trace:
[    0.000000]  [<c014c492>] warn_slowpath_common+0x72/0xa0
[    0.000000]  [<c0115d7b>] ? generic_get_mtrr+0xeb/0x100
[    0.000000]  [<c0115d7b>] ? generic_get_mtrr+0xeb/0x100
[    0.000000]  [<c014c50b>] warn_slowpath_fmt+0x2b/0x30
[    0.000000]  [<c0115d7b>] generic_get_mtrr+0xeb/0x100
[    0.000000]  [<c07ac2b8>] mtrr_trim_uncached_memory+0x76/0x32e
[    0.000000]  [<c0129938>] ? native_write_cr4+0x8/0x10
[    0.000000]  [<c07ab819>] ? get_mtrr_state+0x102/0x10a
[    0.000000]  [<c07ab39a>] ? mtrr_bp_init+0x253/0x271
[    0.000000]  [<c07a720c>] setup_arch+0x41e/0x69f
[    0.000000]  [<c0589bc6>] ? printk+0x1d/0x1f
[    0.000000]  [<c012a499>] ? default_spin_lock_flags+0x9/0x10
[    0.000000]  [<c07a365e>] start_kernel+0xc3/0x357
[    0.000000]  [<c07a30aa>] i386_start_kernel+0xaa/0xb1
[    0.000000] ---[ end trace a7919e7f17c0a725 ]---
[    0.000000] Scanning 0 areas for low memory corruption

- Configured RAM is 1024MB - The system is showing 1002MB.
- I can't noticed any problems while the system is in use.
- I didn't tried to re-compile the VMware tools yet, but I will do so and I will check out the upstream kernel, but 1st I have to
  read the web page. ;-)

As soon as I have news, I will come back and document it.

Regards,
              Wolf

-- 
WARNING: at /build/buildd/linux-2.6.31/arch/x86/kernel/cpu/mtrr/generic.c:456 generic_get_mtrr+0x11e/0x140()
https://bugs.launchpad.net/bugs/459723
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