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Re: 8GB memory not supported



 If I am not mistaken, I believe the processor does not dictate memory
support, your motherboard does that.  



On Sat, 2009-03-07 at 16:08 +0500, saqib butt wrote:
> hi,
> 
> I have Intel Pentium Dual Core E2180 / 2 GHz processor. i just
> upgraded my system with 4 memory sticks i.e. 8GB of RAM due to my
> requirements.
> 
> Now the issue that i am facing is that my 64bit fedora system does not
> showing and supporting more than 3.2 gigs of RAM when i consult
> "/proc/meminfo", "free -m" and "top".
> 
> Also I am getting the following system prompt,
> 
> =====
> 
> Kernel failure message 1:
> WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 4800MB
> of RAM.
> ------------[ cut here ]------------
> WARNING: at arch/x86/kernel/cpu/mtrr/main.c:1557
> mtrr_trim_uncached_memory+0x2c3/0x2ee() (Not tainted)
> Hardware name:         
> Modules linked in:
> Pid: 0, comm: swapper Not tainted 2.6.27.19-170.2.35.fc10.x86_64 #1
> Mar  7 15:54:38 localhost kernel: Call Trace:
> [<ffffffff81041a52>] warn_on_slowpath+0x80/0xb0
> [<ffffffff8116e66a>] ? generic_swap+0x0/0x23
> [<ffffffff815a9fd3>] ? cmp_range+0x0/0xb
> [<ffffffff81331660>] ? printk+0x3c/0x44
> [<ffffffff815ab54b>] mtrr_trim_uncached_memory+0x2c3/0x2ee
> [<ffffffff81331660>] ? printk+0x3c/0x44
> [<ffffffff8159f140>] ? early_idt_handler+0x0/0x71
> [<ffffffff815a6e2c>] setup_arch+0x410/0x777
> [<ffffffff8133396b>] ? _spin_lock+0xa/0xc
> [<ffffffff8159fa34>] start_kernel+0x8d/0x3aa
> [<ffffffff8159f2ba>] x86_64_start_reservations+0xa5/0xa9
> [<ffffffff8159f3ae>] x86_64_start_kernel+0xcd/0xdc
> Mar  7 15:54:38 localhost kernel: ---[ end trace 4eaa2a86a8e2da22 ]---
> 
> 
> Kernel failure message 2:
> WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 4800MB
> of RAM.
> ------------[ cut here ]------------
> WARNING: at arch/x86/kernel/cpu/mtrr/main.c:1557
> mtrr_trim_uncached_memory+0x2c3/0x2ee() (Not tainted)
> Hardware name:         
> Modules linked in:
> Pid: 0, comm: swapper Not tainted 2.6.27.19-170.2.35.fc10.x86_64 #1
> Mar  7 15:51:36 localhost kernel: Call Trace:
> [<ffffffff81041a52>] warn_on_slowpath+0x80/0xb0
> [<ffffffff8116e66a>] ? generic_swap+0x0/0x23
> [<ffffffff815a9fd3>] ? cmp_range+0x0/0xb
> [<ffffffff81331660>] ? printk+0x3c/0x44
> [<ffffffff815ab54b>] mtrr_trim_uncached_memory+0x2c3/0x2ee
> [<ffffffff81331660>] ? printk+0x3c/0x44
> [<ffffffff8159f140>] ? early_idt_handler+0x0/0x71
> [<ffffffff815a6e2c>] setup_arch+0x410/0x777
> [<ffffffff8133396b>] ? _spin_lock+0xa/0xc
> [<ffffffff8159fa34>] start_kernel+0x8d/0x3aa
> [<ffffffff8159f2ba>] x86_64_start_reservations+0xa5/0xa9
> [<ffffffff8159f3ae>] x86_64_start_kernel+0xcd/0xdc
> Mar  7 15:51:36 localhost kernel: ---[ end trace 4eaa2a86a8e2da22 ]---
> 
> 
> Kernel failure message 3:
> WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 4800MB
> of RAM.
> ------------[ cut here ]------------
> WARNING: at arch/x86/kernel/cpu/mtrr/main.c:1557
> mtrr_trim_uncached_memory+0x2c3/0x2ee() (Not tainted)
> Hardware name:         
> Modules linked in:
> Pid: 0, comm: swapper Not tainted 2.6.27.19-170.2.35.fc10.x86_64 #1
> Mar  7 15:33:02 localhost kernel: Call Trace:
> [<ffffffff81041a52>] warn_on_slowpath+0x80/0xb0
> [<ffffffff8116e66a>] ? generic_swap+0x0/0x23
> [<ffffffff815a9fd3>] ? cmp_range+0x0/0xb
> [<ffffffff81331660>] ? printk+0x3c/0x44
> [<ffffffff815ab54b>] mtrr_trim_uncached_memory+0x2c3/0x2ee
> [<ffffffff81331660>] ? printk+0x3c/0x44
> [<ffffffff8159f140>] ? early_idt_handler+0x0/0x71
> [<ffffffff815a6e2c>] setup_arch+0x410/0x777
> [<ffffffff8133396b>] ? _spin_lock+0xa/0xc
> [<ffffffff8159fa34>] start_kernel+0x8d/0x3aa
> [<ffffffff8159f2ba>] x86_64_start_reservations+0xa5/0xa9
> [<ffffffff8159f3ae>] x86_64_start_kernel+0xcd/0xdc
> Mar  7 15:33:02 localhost kernel: ---[ end trace 4eaa2a86a8e2da22 ]---
> 
> 
> Kernel failure message 4:
> WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 4800MB
> of RAM.
> ------------[ cut here ]------------
> WARNING: at arch/x86/kernel/cpu/mtrr/main.c:1557
> mtrr_trim_uncached_memory+0x2c3/0x2ee() (Not tainted)
> Hardware name:         
> Modules linked in:
> Pid: 0, comm: swapper Not tainted 2.6.27.19-170.2.35.fc10.x86_64 #1
> Mar  7 15:29:08 localhost kernel: Call Trace:
> [<ffffffff81041a52>] warn_on_slowpath+0x80/0xb0
> [<ffffffff8116e66a>] ? generic_swap+0x0/0x23
> [<ffffffff815a9fd3>] ? cmp_range+0x0/0xb
> [<ffffffff81331660>] ? printk+0x3c/0x44
> [<ffffffff815ab54b>] mtrr_trim_uncached_memory+0x2c3/0x2ee
> [<ffffffff81331660>] ? printk+0x3c/0x44
> [<ffffffff8159f140>] ? early_idt_handler+0x0/0x71
> [<ffffffff815a6e2c>] setup_arch+0x410/0x777
> [<ffffffff8133396b>] ? _spin_lock+0xa/0xc
> [<ffffffff8159fa34>] start_kernel+0x8d/0x3aa
> [<ffffffff8159f2ba>] x86_64_start_reservations+0xa5/0xa9
> [<ffffffff8159f3ae>] x86_64_start_kernel+0xcd/0xdc
> Mar  7 15:29:08 localhost kernel: ---[ end trace 4eaa2a86a8e2da22 ]---
> 
> 
> Kernel failure message 5:
> WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 4800MB
> of RAM.
> ------------[ cut here ]------------
> WARNING: at arch/x86/kernel/cpu/mtrr/main.c:1555
> mtrr_trim_uncached_memory+0x2b4/0x2df() (Not tainted)
> Modules linked in:
> Pid: 0, comm: swapper Not tainted 2.6.27.5-117.fc10.x86_64 #1
> Mar  7 14:39:07 localhost kernel: Call Trace:
> [<ffffffff810418f2>] warn_on_slowpath+0x60/0x90
> [<ffffffff8116d95a>] ? generic_swap+0x0/0x23
> [<ffffffff815a7f7f>] ? cmp_range+0x0/0xb
> [<ffffffff8132faf6>] ? printk+0x3c/0x3e
> [<ffffffff815a94e8>] mtrr_trim_uncached_memory+0x2b4/0x2df
> [<ffffffff8132faf6>] ? printk+0x3c/0x3e
> [<ffffffff8159d140>] ? early_idt_handler+0x0/0x72
> [<ffffffff815a4dd3>] setup_arch+0x3ff/0x76b
> [<ffffffff81331deb>] ? _spin_lock+0xa/0xc
> [<ffffffff8159da34>] start_kernel+0x8d/0x3aa
> [<ffffffff8159d2ba>] x86_64_start_reservations+0xa5/0xa9
> [<ffffffff8159d3ae>] x86_64_start_kernel+0xcd/0xdc
> Mar  7 14:39:07 localhost kernel: ---[ end trace 4eaa2a86a8e2da22 ]---
> 
> =====
> 
> I have "2.6.27.19-170.2.35.fc10.x86_64" version of kernel with the
> following kernel packages installed,
> 
> kernel-devel-2.6.27.19-170.2.35.fc10.x86_64
> kerneloops-0.12-1.fc10.x86_64
> kernel-headers-2.6.27.19-170.2.35.fc10.x86_64
> kernel-firmware-2.6.27.19-170.2.35.fc10.noarch
> kernel-doc-2.6.27.19-170.2.35.fc10.noarch
> kernel-debug-devel-2.6.27.19-170.2.35.fc10.x86_64
> kernel-debug-2.6.27.19-170.2.35.fc10.x86_64
> kernel-2.6.27.19-170.2.35.fc10.x86_64
> 
> 
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