re: CVS commit: src/sys/kern

[matthew green <mrg%eterna.com.au@localhost>]

"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 It has been superseded by kASan, which is much more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.


.mrg.