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On 29/07/07, Daniel van Ham Colchete <daniel.colchete@×××××.com> wrote: |
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> Hello everyone!!! |
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> |
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> May be somebody can shed some light here... I'm building a server here with |
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> 4GB of RAM memory. The fact is, if I boot with mem=3072M everything goes as |
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> fast as it should but I'm not using 1GB of memory. If I don't put the mem |
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> option, Linux will see 4GB of memory available but it will be damn slow |
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> (really). |
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|
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It sounds like a problem with a buggy BIOS not setting up your MTRR |
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properly. This means linux ends up using ultra-slow memory for |
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important stuff. The problem has been discussed quite a bit on LKML, |
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see here, for example: |
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|
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http://marc.info/?l=linux-kernel&m=118072237228294 |
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> Any lights would be very appreciated. |
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|
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Try upgrading to the latest BIOS version available for your |
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motherboard. If that doesn't fix it you will have to tell linux not to |
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use the affected memory. You can find out where that is by checking |
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your dmesg and /proc/mtrr, as described in the message referenced |
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above. Post the information here if you aren't sure. |
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Cheers, |
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Duane. |
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-- |
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"I never could learn to drink that blood and call it wine" - Bob Dylan |
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-- |
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