[gentoo-user] RAM upgrade, kernel and swap

[gentoo-user] RAM upgrade, kernel and swap

[Michael Higgins]

So, I just got 2 GB of RAM in the mail. Whoo hoo.

Before I pop these in, soliciting any thoughts about the following:

zcat /proc/config.gz |grep MEM
CONFIG_SHMEM=y
# CONFIG_TINY_SHMEM is not set
# CONFIG_NOHIGHMEM is not set
CONFIG_HIGHMEM4G=y
# CONFIG_HIGHMEM64G is not set
CONFIG_HIGHMEM=y
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
# CONFIG_DISCONTIGMEM_MANUAL is not set
# CONFIG_SPARSEMEM_MANUAL is not set
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
# CONFIG_SPARSEMEM_STATIC is not set
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
# CONFIG_BLK_DEV_UMEM is not set
# CONFIG_INPUT_FF_MEMLESS is not set
# CONFIG_DEBUG_HIGHMEM is not set
CONFIG_HAS_IOMEM=y


   Name        Flags      Part Type  FS Type          [Label]
Size (MB)
------------------------------------------------------------------------------
hda1        Boot        Primary   Linux ext2
256.50 hda2                    Primary   Linux swap /
Solaris              1024.46 hda3                    Primary   Linux
ext3                       21480.44 hda5                    Logical
Linux ReiserFS                   28771.84 hda6
Logical   Linux ReiserFS                   28493.15

IOW, do I need to/should I recompile my kernel or change partition
sizes?

Any thoughts appreciated.

Cheers,

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Re: [gentoo-user] RAM upgrade, kernel and swap

[Hemmann, Volker Armin]

On Montag, 21. Januar 2008, Michael Higgins wrote:
> So, I just got 2 GB of RAM in the mail. Whoo hoo.
>
> Before I pop these in, soliciting any thoughts about the following:
>
> zcat /proc/config.gz |grep MEM
> CONFIG_SHMEM=y
> # CONFIG_TINY_SHMEM is not set
> # CONFIG_NOHIGHMEM is not set
> CONFIG_HIGHMEM4G=y
> # CONFIG_HIGHMEM64G is not set
> CONFIG_HIGHMEM=y
> CONFIG_SELECT_MEMORY_MODEL=y
> CONFIG_FLATMEM_MANUAL=y
> # CONFIG_DISCONTIGMEM_MANUAL is not set
> # CONFIG_SPARSEMEM_MANUAL is not set
> CONFIG_FLATMEM=y
> CONFIG_FLAT_NODE_MEM_MAP=y
> # CONFIG_SPARSEMEM_STATIC is not set
> CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
> # CONFIG_BLK_DEV_UMEM is not set
> # CONFIG_INPUT_FF_MEMLESS is not set
> # CONFIG_DEBUG_HIGHMEM is not set
> CONFIG_HAS_IOMEM=y
>
>
>    Name        Flags      Part Type  FS Type          [Label]
> Size (MB)
> ---------------------------------------------------------------------------
>--- hda1        Boot        Primary   Linux ext2
> 256.50 hda2                    Primary   Linux swap /
> Solaris              1024.46 hda3                    Primary   Linux
> ext3                       21480.44 hda5                    Logical
> Linux ReiserFS                   28771.84 hda6
> Logical   Linux ReiserFS                   28493.15
>
> IOW, do I need to/should I recompile my kernel or change partition
> sizes?

if you don't plan to try suspend-to-disk.
No

even if you plan to try suspend-to-disk it might work with a swapfile. So 
still no.
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Re: [gentoo-user] RAM upgrade, kernel and swap

[Michael Higgins]

On Tue, 22 Jan 2008 00:44:53 +0100
"Hemmann, Volker Armin" <volker.armin.hemmann@tu-clausthal.de> wrote:

> On Montag, 21. Januar 2008, Michael Higgins wrote:
> > So, I just got 2 GB of RAM in the mail. Whoo hoo.
> >
> > Before I pop these in, soliciting any thoughts about the following:
> >
> > zcat /proc/config.gz |grep MEM
> > CONFIG_SHMEM=y
> > # CONFIG_TINY_SHMEM is not set
> > # CONFIG_NOHIGHMEM is not set
> > CONFIG_HIGHMEM4G=y
> > # CONFIG_HIGHMEM64G is not set
> > CONFIG_HIGHMEM=y
> > CONFIG_SELECT_MEMORY_MODEL=y
> > CONFIG_FLATMEM_MANUAL=y
> > # CONFIG_DISCONTIGMEM_MANUAL is not set
> > # CONFIG_SPARSEMEM_MANUAL is not set
> > CONFIG_FLATMEM=y
> > CONFIG_FLAT_NODE_MEM_MAP=y
> > # CONFIG_SPARSEMEM_STATIC is not set
> > CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
> > # CONFIG_BLK_DEV_UMEM is not set
> > # CONFIG_INPUT_FF_MEMLESS is not set
> > # CONFIG_DEBUG_HIGHMEM is not set
> > CONFIG_HAS_IOMEM=y
> >
> >
> >    Name        Flags      Part Type  FS Type          [Label]
> > Size (MB)
> > ---------------------------------------------------------------------------
> >--- hda1        Boot        Primary   Linux ext2
> > 256.50 hda2                    Primary   Linux swap /
> > Solaris              1024.46 hda3                    Primary   Linux
> > ext3                       21480.44 hda5                    Logical
> > Linux ReiserFS                   28771.84 hda6
> > Logical   Linux ReiserFS                   28493.15
> >
> > IOW, do I need to/should I recompile my kernel or change partition
> > sizes?
> 
> if you don't plan to try suspend-to-disk.
> No
> 
> even if you plan to try suspend-to-disk it might work with a
> swapfile. So still no.

Thanks for the feedback. I figured I'd be covered with the setup as it
is, but you never know... unless you know. This thing never sleeps...
so no worries there.

Anyway, I just popped 'em in:

$ free
             total       used       free     shared    buffers     cached
Mem:       2074548     166048    1908500          0       6812      77284
-/+ buffers/cache:      81952    1992596
Swap:      1000432          0    1000432

[ Nice. I like that last line a lot. ]

Cheers,

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Re: [gentoo-user] RAM upgrade, kernel and swap

[Hal Martin]

Ahh, but it won't last...

$ free
                          total       used       free     shared   
buffers     cached
Mem:       2059824    2044512      15312          0      37636      50868
-/+ buffers/cache:      1956008     103816
Swap:      4289308    1229024    3060284

Now this I can live with...

$ free
                        total       used       free     shared   
buffers     cached
Mem:       3629832    3499156   130676         0      56644    3070796
-/+ buffers/cache:      371716    3258116
Swap:            0          0          0

Unfortunately that machine is 32bit and thus only supports ~3.6GB of the
4GB of RAM. :-(

-Hal

Michael Higgins wrote:
> On Tue, 22 Jan 2008 00:44:53 +0100
> "Hemmann, Volker Armin" <volker.armin.hemmann@tu-clausthal.de> wrote:
>
>   
>> On Montag, 21. Januar 2008, Michael Higgins wrote:
>>     
>>> So, I just got 2 GB of RAM in the mail. Whoo hoo.
>>>
>>> Before I pop these in, soliciting any thoughts about the following:
>>>
>>> zcat /proc/config.gz |grep MEM
>>> CONFIG_SHMEM=y
>>> # CONFIG_TINY_SHMEM is not set
>>> # CONFIG_NOHIGHMEM is not set
>>> CONFIG_HIGHMEM4G=y
>>> # CONFIG_HIGHMEM64G is not set
>>> CONFIG_HIGHMEM=y
>>> CONFIG_SELECT_MEMORY_MODEL=y
>>> CONFIG_FLATMEM_MANUAL=y
>>> # CONFIG_DISCONTIGMEM_MANUAL is not set
>>> # CONFIG_SPARSEMEM_MANUAL is not set
>>> CONFIG_FLATMEM=y
>>> CONFIG_FLAT_NODE_MEM_MAP=y
>>> # CONFIG_SPARSEMEM_STATIC is not set
>>> CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
>>> # CONFIG_BLK_DEV_UMEM is not set
>>> # CONFIG_INPUT_FF_MEMLESS is not set
>>> # CONFIG_DEBUG_HIGHMEM is not set
>>> CONFIG_HAS_IOMEM=y
>>>
>>>
>>>    Name        Flags      Part Type  FS Type          [Label]
>>> Size (MB)
>>> ---------------------------------------------------------------------------
>>> --- hda1        Boot        Primary   Linux ext2
>>> 256.50 hda2                    Primary   Linux swap /
>>> Solaris              1024.46 hda3                    Primary   Linux
>>> ext3                       21480.44 hda5                    Logical
>>> Linux ReiserFS                   28771.84 hda6
>>> Logical   Linux ReiserFS                   28493.15
>>>
>>> IOW, do I need to/should I recompile my kernel or change partition
>>> sizes?
>>>       
>> if you don't plan to try suspend-to-disk.
>> No
>>
>> even if you plan to try suspend-to-disk it might work with a
>> swapfile. So still no.
>>     
>
> Thanks for the feedback. I figured I'd be covered with the setup as it
> is, but you never know... unless you know. This thing never sleeps...
> so no worries there.
>
> Anyway, I just popped 'em in:
>
> $ free
>              total       used       free     shared    buffers     cached
> Mem:       2074548     166048    1908500          0       6812      77284
> -/+ buffers/cache:      81952    1992596
> Swap:      1000432          0    1000432
>
> [ Nice. I like that last line a lot. ]
>
> Cheers,
>
>   

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Re: [gentoo-user] RAM upgrade, kernel and swap

[Ricardo Saffi Marques]

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There is an option in the kernel that will make it "see" all the 4GB. Set
the option for up o 64GB in the kernel and you may use your 4GB.

On 1/24/08, Hal Martin <hal.martin@gmail.com> wrote:
>
> Ahh, but it won't last...
>
> $ free
>                           total       used       free     shared
> buffers     cached
> Mem:       2059824    2044512      15312          0      37636      50868
> -/+ buffers/cache:      1956008     103816
> Swap:      4289308    1229024    3060284
>
> Now this I can live with...
>
> $ free
>                         total       used       free     shared
> buffers     cached
> Mem:       3629832    3499156   130676         0      56644    3070796
> -/+ buffers/cache:      371716    3258116
> Swap:            0          0          0
>
> Unfortunately that machine is 32bit and thus only supports ~3.6GB of the
> 4GB of RAM. :-(
>
> -Hal
>
> Michael Higgins wrote:
> > On Tue, 22 Jan 2008 00:44:53 +0100
> > "Hemmann, Volker Armin" <volker.armin.hemmann@tu-clausthal.de> wrote:
> >
> >
> >> On Montag, 21. Januar 2008, Michael Higgins wrote:
> >>
> >>> So, I just got 2 GB of RAM in the mail. Whoo hoo.
> >>>
> >>> Before I pop these in, soliciting any thoughts about the following:
> >>>
> >>> zcat /proc/config.gz |grep MEM
> >>> CONFIG_SHMEM=y
> >>> # CONFIG_TINY_SHMEM is not set
> >>> # CONFIG_NOHIGHMEM is not set
> >>> CONFIG_HIGHMEM4G=y
> >>> # CONFIG_HIGHMEM64G is not set
> >>> CONFIG_HIGHMEM=y
> >>> CONFIG_SELECT_MEMORY_MODEL=y
> >>> CONFIG_FLATMEM_MANUAL=y
> >>> # CONFIG_DISCONTIGMEM_MANUAL is not set
> >>> # CONFIG_SPARSEMEM_MANUAL is not set
> >>> CONFIG_FLATMEM=y
> >>> CONFIG_FLAT_NODE_MEM_MAP=y
> >>> # CONFIG_SPARSEMEM_STATIC is not set
> >>> CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
> >>> # CONFIG_BLK_DEV_UMEM is not set
> >>> # CONFIG_INPUT_FF_MEMLESS is not set
> >>> # CONFIG_DEBUG_HIGHMEM is not set
> >>> CONFIG_HAS_IOMEM=y
> >>>
> >>>
> >>>    Name        Flags      Part Type  FS Type          [Label]
> >>> Size (MB)
> >>>
> ---------------------------------------------------------------------------
> >>> --- hda1        Boot        Primary   Linux ext2
> >>> 256.50 hda2                    Primary   Linux swap /
> >>> Solaris              1024.46 hda3                    Primary   Linux
> >>> ext3                       21480.44 hda5                    Logical
> >>> Linux ReiserFS                   28771.84 hda6
> >>> Logical   Linux ReiserFS                   28493.15
> >>>
> >>> IOW, do I need to/should I recompile my kernel or change partition
> >>> sizes?
> >>>
> >> if you don't plan to try suspend-to-disk.
> >> No
> >>
> >> even if you plan to try suspend-to-disk it might work with a
> >> swapfile. So still no.
> >>
> >
> > Thanks for the feedback. I figured I'd be covered with the setup as it
> > is, but you never know... unless you know. This thing never sleeps...
> > so no worries there.
> >
> > Anyway, I just popped 'em in:
> >
> > $ free
> >              total       used       free     shared    buffers
> cached
> > Mem:       2074548     166048    1908500          0
> 6812      77284
> > -/+ buffers/cache:      81952    1992596
> > Swap:      1000432          0    1000432
> >
> > [ Nice. I like that last line a lot. ]
> >
> > Cheers,
> >
> >
>
> --
> gentoo-user@lists.gentoo.org mailing list
>
>


-- 
Ricardo Saffi Marques
Laboratório de Administração e Segurança de Sistemas (LAS/IC)
Universidade Estadual de Campinas (UNICAMP)
Cell: +55 (19) 8128-0435
Skype: ricardo_saffi_marques
Website: http://www.rsaffi.com

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Re: [gentoo-user] RAM upgrade, kernel and swap

[Hemmann, Volker Armin]

On Donnerstag, 24. Januar 2008, Ricardo Saffi Marques wrote:
> There is an option in the kernel that will make it "see" all the 4GB. Set
> the option for up o 64GB in the kernel and you may use your 4GB.

and slow down memory access a lot.
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Re: [gentoo-user] RAM upgrade, kernel and swap

[Ricardo Saffi Marques]

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That's the problem. For one thing to work, you have to sacrify other(s). :-/

On 1/24/08, Hemmann, Volker Armin <volker.armin.hemmann@tu-clausthal.de>
wrote:
>
> On Donnerstag, 24. Januar 2008, Ricardo Saffi Marques wrote:
> > There is an option in the kernel that will make it "see" all the 4GB.
> Set
> > the option for up o 64GB in the kernel and you may use your 4GB.
>
> and slow down memory access a lot.
> --
> gentoo-user@lists.gentoo.org mailing list
>
>


-- 
Ricardo Saffi Marques
Laboratório de Administração e Segurança de Sistemas (LAS/IC)
Universidade Estadual de Campinas (UNICAMP)
Cell: +55 (19) 8128-0435
Skype: ricardo_saffi_marques
Website: http://www.rsaffi.com

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Re: [gentoo-user] RAM upgrade, kernel and swap

[Hemmann, Volker Armin]

On Donnerstag, 24. Januar 2008, Ricardo Saffi Marques wrote:
> That's the problem. For one thing to work, you have to sacrify other(s).

and AFAIR the option won't help you, if your maiboards bios maps pci-space at 
the 3,6GB-4GB range. 
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Re: [gentoo-user] RAM upgrade, kernel and swap

[Ricardo Saffi Marques]

[-- Attachment #1: Type: TEXT/PLAIN, Size: 733 bytes --]

On Thu, 24 Jan 2008, Hemmann, Volker Armin wrote:

> On Donnerstag, 24. Januar 2008, Ricardo Saffi Marques wrote:
>> That's the problem. For one thing to work, you have to sacrify other(s).
>
> and AFAIR the option won't help you, if your maiboards bios maps pci-space at
> the 3,6GB-4GB range.
> -- 
> gentoo-user@lists.gentoo.org mailing list
>

You're absolutely right about that. My machines as 64-bits and I don't 
even have that ammount of RAM, but I disable that bios option, anyway.

--
Ricardo Saffi Marques
Laboratório de Administração e Segurança de Sistemas (LAS/IC)
Universidade Estadual de Campinas (UNICAMP)
Cell: +55 (19) 8128-0435
Skype: ricardo_saffi_marques
Website: http://www.rsaffi.com

Re: [gentoo-user] RAM upgrade, kernel and swap

[Hal Martin]

Well this machine supposedly supports up to 8GB of RAM so I can only
assume that it doesn't map the pci-space to there. But I wonder, will
enabling the higher RAM limit really open up more RAM? The BIOS detects
all 4096MB, but Grub only lists 3.6GB.

AFAIK your machine can only use as much RAM as the bootloader detects, no?


-Hal


Ricardo Saffi Marques wrote:
> On Thu, 24 Jan 2008, Hemmann, Volker Armin wrote:
>
>> On Donnerstag, 24. Januar 2008, Ricardo Saffi Marques wrote:
>>> That's the problem. For one thing to work, you have to sacrify
>>> other(s).
>>
>> and AFAIR the option won't help you, if your maiboards bios maps
>> pci-space at
>> the 3,6GB-4GB range.
>> -- 
>> gentoo-user@lists.gentoo.org mailing list
>>
>
> You're absolutely right about that. My machines as 64-bits and I don't
> even have that ammount of RAM, but I disable that bios option, anyway.
>
> -- 
> Ricardo Saffi Marques
> Laboratório de Administração e Segurança de Sistemas (LAS/IC)
> Universidade Estadual de Campinas (UNICAMP)
> Cell: +55 (19) 8128-0435
> Skype: ricardo_saffi_marques
> Website: http://www.rsaffi.com

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Re: [gentoo-user] RAM upgrade, kernel and swap

[Dirk Heinrichs]

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Am Donnerstag, 24. Januar 2008 schrieb ext Hal Martin:

> AFAIK your machine can only use as much RAM as the bootloader detects,
> no?

Would be a bad thing, wouldn't it?

No, the kernel does it's own detection.

Bye...

	Dirk
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Re: [gentoo-user] RAM upgrade, kernel and swap

[Hemmann, Volker Armin]

On Donnerstag, 24. Januar 2008, Ricardo Saffi Marques wrote:
> On Thu, 24 Jan 2008, Hemmann, Volker Armin wrote:
> > On Donnerstag, 24. Januar 2008, Ricardo Saffi Marques wrote:
> >> That's the problem. For one thing to work, you have to sacrify other(s).
> >
> > and AFAIR the option won't help you, if your maiboards bios maps
> > pci-space at the 3,6GB-4GB range.
> > --
> > gentoo-user@lists.gentoo.org mailing list
>
> You're absolutely right about that. My machines as 64-bits and I don't
> even have that ammount of RAM, but I disable that bios option, anyway.

well, my machine is 64bit too, I have 4GB of ram and a stupid bios - nothing I 
can do about ;)
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Re: [gentoo-user] RAM upgrade, kernel and swap

[Hemmann, Volker Armin]

On Donnerstag, 24. Januar 2008, Hemmann, Volker Armin wrote:
> On Donnerstag, 24. Januar 2008, Ricardo Saffi Marques wrote:
> > On Thu, 24 Jan 2008, Hemmann, Volker Armin wrote:
> > > On Donnerstag, 24. Januar 2008, Ricardo Saffi Marques wrote:
> > >> That's the problem. For one thing to work, you have to sacrify
> > >> other(s).
> > >
> > > and AFAIR the option won't help you, if your maiboards bios maps
> > > pci-space at the 3,6GB-4GB range.
> > > --
> > > gentoo-user@lists.gentoo.org mailing list
> >
> > You're absolutely right about that. My machines as 64-bits and I don't
> > even have that ammount of RAM, but I disable that bios option, anyway.
>
> well, my machine is 64bit too, I have 4GB of ram and a stupid bios -
> nothing I can do about ;)

oh, wait - I am stupid. I can access all the 4gb - but the last 700mb aren't 
covered by mtrr. I confused the too. Need sugar. Now ;)
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