Re: [PATCH v6 18/18] x86/kasan: Make software tag-based kasan available
From: Alexander Potapenko <glider@google.com>
Date: 2025-11-11 09:01:38
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linux-doc, linux-kbuild, lkml, llvm
On Wed, Oct 29, 2025 at 9:11 PM Maciej Wieczor-Retman [off-list ref] wrote:
From: Maciej Wieczor-Retman <redacted>
- ffffec0000000000 | -20 TB | fffffbffffffffff | 16 TB | KASAN shadow memory + ffffec0000000000 | -20 TB | fffffbffffffffff | 16 TB | KASAN shadow memory (generic mode) + fffff40000000000 | -8 TB | fffffbffffffffff | 8 TB | KASAN shadow memory (software tag-based mode) __________________|____________|__________________|_________|____________________________________________________________
+ ffdf000000000000 | -8.25 PB | fffffbffffffffff | ~8 PB | KASAN shadow memory (generic mode) + ffeffc0000000000 | -6 PB | fffffbffffffffff | 4 PB | KASAN shadow memory (software tag-based mode) __________________|____________|__________________|_________|____________________________________________________________
+ default 0xeffffc0000000000 if KASAN_SW_TAGS
default 0xdffffc0000000000Please elaborate in the patch description how these values were picked.