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#243203 - 02/12/2004 22:32

Memory under reported in Debian

rob
carpal tunnel

Registered: 21/05/1999
Posts: 5335
Loc: Cambridge UK

The machine has 2GB installed (and correctly reported by the BIOS) but Debian reports less than half that:

        total:    used:    free:  shared: buffers:  cached:
Mem:  927137792 427286528 499851264        0 87658496 253304832
Swap: 6662434816        0 6662434816
MemTotal:       905408 kB
MemFree:        488136 kB
MemShared:           0 kB
Buffers:         85604 kB
Cached:         247368 kB
SwapCached:          0 kB
Active:         161424 kB
Inactive:       198888 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:       905408 kB
LowFree:        488136 kB
SwapTotal:     6506284 kB
SwapFree:      6506284 kB

Any ideas?

Rob

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#243204 - 02/12/2004 22:39 Re: Memory under reported in Debian [Re: rob]
Geoff enthusiast Registered: 21/08/1999 Posts: 381 Loc: Northern Ireland	Does the kernel have highmem support compiled in? I had the same problem when I upgraded my RAM to 1GB. Without Highmem support configured in the kernel, I think Linux only recognises about 896MB. _________________________ Geoff ---- ------- Mk1 Blue - was 4GB, now 16GB Mk2 Red - was 12GB, now 60GB
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#243205 - 02/12/2004 22:46 Re: Memory under reported in Debian [Re: Geoff]
rob carpal tunnel Registered: 21/05/1999 Posts: 5335 Loc: Cambridge UK	Thanks, that sounds about right, I'll have a look at it now. It just occured to me that it doesn't seem to know there are two processors either - I should have spent some time on the basics before spending all day setting up the email system Rob
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#243206 - 02/12/2004 23:20 Re: Memory under reported in Debian [Re: Geoff]
rob carpal tunnel Registered: 21/05/1999 Posts: 5335 Loc: Cambridge UK	That fixed the memory, but now it is reporting four processors, when I'm pretty sure there are just two. Maybe I should just build a kernel instead of grabbing packages! Rob
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#243207 - 02/12/2004 23:24 Re: Memory under reported in Debian [Re: rob]
drakino carpal tunnel Registered: 08/06/1999 Posts: 7868	Does the machine support Hyperthreading? Could explain the 4 processors instead of two. If it's a newer 2.4 kernel it will know what HT is, and 2.6 deals with it even better.
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#243208 - 02/12/2004 23:35 Re: Memory under reported in Debian [Re: drakino]
rob carpal tunnel Registered: 21/05/1999 Posts: 5335 Loc: Cambridge UK	Quote: Does the machine support Hyperthreading? Could explain the 4 processors instead of two. If it's a newer 2.4 kernel it will know what HT is, and 2.6 deals with it even better. Yes it does! I'm all excited now Rob
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#243209 - 03/12/2004 00:00 Re: Memory under reported in Debian [Re: rob]
SuperQ addict Registered: 13/06/2000 Posts: 429 Loc: Berlin, DE	wow.. what debian version, and what kernel were you using that it didn't have highmem support? hehe.. woody with 2.2? eek! _________________________ 80gig red mk2 -- 080000125 (No, I don't actually hate Alan Cox)
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#243210 - 03/12/2004 10:09 Re: Memory under reported in Debian [Re: SuperQ]
rob carpal tunnel Registered: 21/05/1999 Posts: 5335 Loc: Cambridge UK	Quote: wow.. what debian version, and what kernel were you using that it didn't have highmem support? hehe.. woody with 2.2? eek! The default sarge netinstall, which put in a 2.4 386 kernel with no highmem or smp. Rob
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