| commit | c754dcfaa056159b92357ea22ce01b8dba2162a5 | [log] [tgz] |
|---|---|---|
| author | Adrian Danis <adanis@fuchsia.infra.roller.google.com> | Thu Jul 18 03:11:45 2024 +0000 |
| committer | Copybara-Service <copybara-worker@google.com> | Wed Jul 17 20:13:37 2024 -0700 |
| tree | 10a3a8825b9b32ce11a850a1d60685701622f1e5 | |
| parent | c06dacf417b8d3a51d5bc1d38cb1a49b9a0f4916 [diff] |
[roll] Roll fuchsia Reland "[kernel][vm] Remove redundant trim" This is a reland of commit 78d34c2413834be2238307e499b73e898920e49c Original CL was miss-attributed and was found to not be the culprit. Original change's description: > [kernel][vm] Remove redundant trim > > Due to the way looking up multiple pages in a VmObject use to work, > that is the LookupPagesLocked interface, the requested pages from a > page fault was trimmed to prevent more than the actual faulting page > from being marked dirty. The current LookupCursor interface uses an > explicit IfExistPages lookup, which is not allowed to perform dirty > transitions, and so the requested length does not need specific > trimming. > > This does not improve performance or change behavior, but it improves > code clarity as the existing comment, check and logic is now confusing > given the current LookupCursor behavior. > > There are existing core-tests that explicitly validate that page faults > do not cause additional dirty transitions. > > Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1048655 Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1084092 Original-Revision: 57a9eadde41a045a697051e5884856f697ed06f9 GitOrigin-RevId: b69b5d5b48983ed992dca07ec5deb3aee7a5e417 Change-Id: Ia20342b5d23cdd09cc38bfbf889567362f7819cd
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