Re: Patch to reorder functions in the vmlinux to a defined order

[Rene Herman]

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 majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/