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3b2b9a875d
Remove some very outdated recommendations in Documentation/memory.txt Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
34 lines
1.2 KiB
Plaintext
34 lines
1.2 KiB
Plaintext
There are several classic problems related to memory on Linux
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systems.
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1) There are some motherboards that will not cache above
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a certain quantity of memory. If you have one of these
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motherboards, your system will be SLOWER, not faster
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as you add more memory. Consider exchanging your
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motherboard.
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All of these problems can be addressed with the "mem=XXXM" boot option
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(where XXX is the size of RAM to use in megabytes).
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It can also tell Linux to use less memory than is actually installed.
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If you use "mem=" on a machine with PCI, consider using "memmap=" to avoid
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physical address space collisions.
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See the documentation of your boot loader (LILO, grub, loadlin, etc.) about
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how to pass options to the kernel.
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There are other memory problems which Linux cannot deal with. Random
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corruption of memory is usually a sign of serious hardware trouble.
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Try:
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* Reducing memory settings in the BIOS to the most conservative
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timings.
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* Adding a cooling fan.
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* Not overclocking your CPU.
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* Having the memory tested in a memory tester or exchanged
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with the vendor. Consider testing it with memtest86 yourself.
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* Exchanging your CPU, cache, or motherboard for one that works.
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