Subject: RE: 8gb memory on Redhat AS 2.1

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Subject: RE: 8gb memory on Redhat AS 2.1

Subject: RE: 8gb memory on Redhat AS 2.1

2007-10-12 - By Pankaj Govil

Back
A Server that is using uniprocessor kernel will only recognize 4GB RAM

This is how a server which was not using smp module showed

# more /proc/meminfo
MemTotal: 3107748 kB
MemFree: 2550724 kB
Buffers: 195056 kB
Cached: 147660 kB
SwapCached: 0 kB
Active: 295124 kB
Inactive: 199776 kB
HighTotal: 2227872 kB
HighFree: 1934336 kB
LowTotal: 879876 kB
LowFree: 616388 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 732 kB
Writeback: 0 kB
Mapped: 221648 kB
Slab: 40356 kB
CommitLimit: 1553872 kB
Committed_AS: 866636 kB
PageTables: 2920 kB
VmallocTotal: 106488 kB
VmallocUsed: 5816 kB
VmallocChunk: 99928 kB
HugePages_Total: 0
HugePages_Free: 0
Hugepagesize: 4096 kB

You will have to update the kernel.

up2date-nox -uf kernel-smp

Thx,

Pankaj Govil

-- --Original Message-- --
From: redhat-list-bounces@(protected)
[mailto:redhat-list-bounces@(protected)] On Behalf Of Steve Phillips
Sent: Tuesday, October 09, 2007 1:07 AM
To: tony.delov@(protected); General Red Hat Linux discussion list
Subject: Re: 8gb memory on Redhat AS 2.1

t wrote:
> Hi All,
> Im running Redhat AS 2.1 on an IBM HS20 Blade Server.
> I have just upgraded the ram to 8Gb.
> The 8Gb memory shows up in the bios but the linux system only shows
4gb?
>
> Is there any special way to get the extra memory recognized in Redhat
> AS 2.1?
>
> I have a server that's running Redhat ES 2.1 that has 8gb of ram.
> That system has a custom kernel and is running on different hardware,
> I'm wondering if that would be the reason why?

Its been a while since I compiled a kernel, but I believe there used to
be a 'bigmem' option that needed to be enabled if you had more than 4Gig
of RAM in the box.

I dont recall which kernel version this was in - try pulling down a
2.4.x kernel and running the make xconfig (or whatever) on a box and
seeing what options there are and comparing it possibly to your custom
kernel's 'make xconfig' ?

--
Steve.

--
Steve.

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