Page MenuHomeFreeBSD

vm_page: Reorder some fields
Needs ReviewPublic

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
Subscribers
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.

Diff Detail

Repository
rG FreeBSD src repository
Lint
Lint Skipped
Unit
Tests Skipped
Build Status
Buildable 64582
Build 61466: arc lint + arc unit