vm_page: Reorder some fields
Needs ReviewPublic
Actions

Authored by markj on Jun 2 2025, 1:51 AM.

Tags

None

Referenced Files

	Unknown Object (File)
	Thu, Nov 20, 4:38 AM

	Unknown Object (File)
	Thu, Nov 13, 3:23 PM

	Unknown Object (File)
	Wed, Nov 5, 10:41 AM

	Unknown Object (File)
	Mon, Nov 3, 4:41 PM

	Unknown Object (File)
	Mon, Nov 3, 2:27 PM

	Unknown Object (File)
	Sun, Nov 2, 9:29 AM

	Unknown Object (File)
	Sat, Nov 1, 1:18 AM

	Unknown Object (File)
	Fri, Oct 31, 10:03 PM

View All 52 Files

Subscribers

imp

This revision needs review, but there are no reviewers specified.

Details

Reviewers: None

Summary

With listq removed, UMA can start using the first 32 bytes of struct
vm_page to store a slab header. Reorder some fields to make this
possible. In particular, move pindex to offset 0 so that the pctrie
implementation doesn't need to add an offset to vm_page pointers.

It's ok for a noobj page consumer to use the ref_count and busy_lock
fields for their own purposes, so move those too.