Properly handle freeing of the allocated pt page.

I only read the sys/kern bits.

In D51089#1166071, @mandree wrote:

Thanks for the contribution, but I think this arrives too early (unless I've missed documentation, and I believe I checked the usual places).

I stumbled upon this code block, which confuses me: https://github.com/llvm/llvm-project/blob/84c849e85b0f8ab2d8bbeb2d9c46349f019f4e8e/clang/lib/Driver/ToolChains/FreeBSD.cpp#L329-L337

improve tests

The reporter closed the tickets out of frustration:

• https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=284749
• https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=284404

Restore "unlock the vnode around the exec hook call"

If needed I can run a mini exp-run on ports with this change applied and devel/libunwind disabled akin to https://reviews.freebsd.org/D50736

In D37885#1166278, @des wrote:

Well then what was the point of adding vn_getsize() if it wasn't eventually going to be backed by a VOP?

It would be useful to provide a reasoning why the setting is safe.

Thanks for adding the context. Adding some reviewers who may be familiar with the topic.

pmap_demote_PDEP(): Add WITNESS_WARN, contain operations with m into global if.

• English and markup both look good to me at a glance, but I can't attest to consistency with source code
• I think you also need to add to MLINKS in the appropriate Makefile so "man sched_setaffinity" will work

Diff now has full context (-U 10000).

made the example text a bit more verbose but more descriptive.

Thanks for the elaboration. Looks good to me now.

Make the same change for arm, i386 and riscv

Well then what was the point of adding vn_getsize() if it wasn't eventually going to be backed by a VOP?