Re: [RFC PATCH v2 14/32] x86: mm: Provide support to use memblock when spliting large pages

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




On 17/03/2017 11:56, Borislav Petkov wrote:
>> Theoretically or practically?
> In the sense, it needs to be tried first to see how ugly it can get.
> 
>> It only looks at the E820 map, doesn't it?  Why does it have to do
>> anything with percpu memory areas?
> That's irrelevant. What we want to do is take what's in init_mm.pgd and
> modify it. And use the facilities in arch/x86/mm/init_{32,64}.c because
> they already know about early/late pagetable pages allocation and they
> deal with the kernel pagetable anyway.

If it is possible to do it in a fairly hypervisor-independent manner,
I'm all for it.  That is, only by looking at AMD-specified CPUID leaves
and at kernel ELF sections.

Paolo

> And *not* teach pageattr.c about memblock because that can be misused,
> as tglx pointed out on IRC.

--
To unsubscribe from this list: send the line "unsubscribe linux-efi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Security]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [ECOS]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux