3 ms·
The memmap trick is pretty clever, though I wonder what the syntax is to make grub reserve multiple unrelated bytes instead of a 1-byte contiguous 'chunk.'
by ayuvar 10y ago
The memmap trick is pretty clever, though I wonder what the syntax is to make grub reserve multiple unrelated bytes instead of a 1-byte contiguous 'chunk.'
- rzzzt 10y agomemtest86 can be configured to display address bit patterns that can then be consumed by the Linux kernel as a command line argument: https://lwn.net/Articles/440319/ https://lwn.net/Articles/440319/ But in other cases, this can be managed entirely by the BIOS. I know (or rather, think -- didn't boot Linux on a machine with memory problems recently) that some Dell machines will mark bad locations/ranges as reserved in the ACPI memory map if you run the built-in diagnostic tool from the boot menu.
- j_s 10y agoI've heard rumors of low prices on high-capacity "bad RAM", but never been able to find anywhere to buy it. Have you investigated this possibility before?
- rzzzt 10y agoNever heard that one before; I don't know much about how problem spots usually develop, so I would be wary about the "stability" of any known faults when using a module like that.
- yuhong 10y agoI was thinking of replacing the faulty DRAM chip, but sadly with modern RAM using BGA this is not a trivial job though probably not impossible.