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Re: CVS commit: src/sys/kern

On 15/08/2019 23:05, matthew green wrote:
"Maxime Villard" writes:
Module Name:	src
Committed By:	maxv
Date:		Thu Aug 15 12:06:42 UTC 2019

Modified Files:
	src/sys/kern: subr_kmem.c

Log Message:
Retire KMEM_GUARD. It has been superseded by kASan, which is much more
powerful, has much more coverage - far beyond just kmem(9) -, and also
consumes less memory.

KMEM_GUARD was a debug-only option that required special DDB tweaking, and
had no use in releases or even diagnostic kernels.

As a general rule, the policy now is to harden the pool layer by default
in GENERIC, and use kASan as a diagnostic/debug/fuzzing feature to verify
each memory allocation & access in the system.

was this discussed?

KMEM_GUARD is useful for platforms that don't have kasan yet.

yet? Can 32bit platforms and limit KVA have KASAN?


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