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A performance penalty and kernel memory management complexity comes from peripherals and kernel's inability to directly address all memory and resulting need fo
by zurn 11y ago
A performance penalty and kernel memory management complexity comes from peripherals and kernel's inability to directly address all memory and resulting need for bounce buffers. Liked it was with ISA dma 16mb limitation and Linux in the bad old days.
- dezgeg 11y agoYou don't need PAE/LPAE to get to the situation where the kernel can't directly address all physical memory. That point is reached at ~900 MB, after which you need to compile the kernel with HIGHMEM support.