Messages in this thread |  | | | Date | Sun, 29 May 2011 14:47:02 +0200 | | From | Ingo Molnar <> | | Subject | Re: [RFC][PATCH] Randomize kernel base address on boot |
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* H. Peter Anvin <hpa@zytor.com> wrote:
> On 05/28/2011 05:18 AM, Ingo Molnar wrote: > > > > Having half a megabyte of '__init buffer' at the beginning or end > > of the kernel image is no big deal, it's more than enough for > > good randomization and makes the whole thing image-loader > > invariant: we can freely shift the 'real' kernel image within > > this larger boundary without consulting RAM maps. > > Sure, but you're also blowing any attempt at PMD alignment to > kingdom come.
Do you mean we'd not start at a 2MB boundary and thus would waste on average an about 0.125 worth of huge-TLB cache entry?
That does not look like a very big issue to me - but maybe i'm missing something and you mean something else.
Thanks,
Ingo
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