Re: [PATCH] x86/mm: Define the zapped-entry checks only with CONFIG_DEBUG_VM

[Edgecombe, Rick P]

On Tue, 2026-11-03 at 10:13 +0000, Kiryl Shutsemau wrote:
> On Mon, Nov 02, 2026 at 01:12:47PM -0800, Dave Hansen wrote:
> > Or, heck, I'm not that attached to these checks. Let's just kill them.
> 
> Works for me. x86 is the only architecture with them, although arm64 and
> riscv have shadow stacks too, and the x86 helpers already keep
> Write=0,Dirty=1 out of other VMAs. Patch below, without the Fixes: tag.
> 
> Rick, any objection?

Eh, I guess I'm lukewarm on it. These checks only catch the case at zap time, so
it's not a huge protection that is being pulled out. I thought they were useful.
At the same time, they have never triggered.