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0 pointsploxiln1y ago0 comments

32-bit x86 linux will typically support 3GB per process, with 1GB kernel address area, I think? (Windows did 2GB / 2GB split by default, custom boot options can change it to 3GB / 1GB, but only some 32-bit apps fully supported it, like photoshop).

Also, FWIW, security people can get real bothered that ASLR doesn't do much in 32-bit systems.

So, I think starting around 2GB DRAM, it's probably a "big enough" system to justify a 64-bit OS.

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junon1y ago

On 32 bit you can of course make the kernel higher half, but yes AFAIK most mainstream kernels chose higher quarter to grant more vaddr space to processes.

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0 pointsploxiln1y ago0 comments

Also, FWIW, security people can get real bothered that ASLR doesn't do much in 32-bit systems.

So, I think starting around 2GB DRAM, it's probably a "big enough" system to justify a 64-bit OS.

0 comments

junon1y ago

On 32 bit you can of course make the kernel higher half, but yes AFAIK most mainstream kernels chose higher quarter to grant more vaddr space to processes.

j / k navigate · click thread line to collapse