Eric W. Biederman wrote:
The page table trickery is actually the more invasive approach. I believe for 32 bit kernels the real problem is giving up the identity mapping of low memory.
Yes, you probably don't want to have to specialcase anything there.
Short of the moving the kernel to end of the address space where vmalloc and the fixmaps are now I don't think there is a reasonable chunk of the address space we can use.
To my handwaving ears end of the address space sounds very good though. Is there currently any pressure on VMALLOC_RESERVE (128M)? Teaching the linker appears to be a matter of changing __KERNEL_START. That leaves actually mapping ourselves there, and... more invasiveness?
I saw you say you already have some actual relocating patches though? Rene. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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