El mar, 17-06-2008 a las 22:52 +0800, Bean escribió: > Hi, > > I think memory is not a problem here, as grub2 can use upper memory: > > src = raw data > dest = 0x100000 > buf = dest + kernel_size > We could do that, but since the code would execute at the very first stages, where we still don't have a memory map, we could overwrite something important and wreak havoc. It's unlikely, since most computers have a wide space at 1MB with most or all of the RAM, before the ACPI structures and the BIOS area at the end. However, we should contemplate the possibility of things going awry and prepare to receive bug reports about failures on esoterically nonstandard computers, such as "GRUB triple-faults my HP Vectra 75". Alternatively, we could first check the BDA and, if we have enough "lower" memory for the operation, use it before venturing into post-1MB territory.
I'm currently checking the memory requisites of LZMA decompression depending on the -1..9 compression setting, and will report back when finished
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