| Date | Wed, 10 Sep 2014 21:01:29 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [RFC/PATCH v2 02/10] x86_64: add KASan support |
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On 09/10/2014 07:31 AM, Andrey Ryabinin wrote: > This patch add arch specific code for kernel address sanitizer. > > 16TB of virtual addressed used for shadow memory. > It's located in range [0xffff800000000000 - 0xffff900000000000] > Therefore PAGE_OFFSET has to be changed from 0xffff880000000000 > to 0xffff900000000000.
NAK on this.
0xffff880000000000 is the lowest usable address because we have agreed to leave 0xffff800000000000-0xffff880000000000 for the hypervisor or other non-OS uses.
Bumping PAGE_OFFSET seems needlessly messy, why not just designate a zone higher up in memory?
-hpa
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