remove tmp page copying #16
Merged
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
The writepage operation is deprecated as it leads to worse performance under high memory pressure due to folios being written out in LRU order rather than sequentially within a file. Use filemap_migrate_folio() to support dirty folio migration instead of writepage. Signed-off-by: "Matthew Wilcox (Oracle)" <[email protected]> Signed-off-by: Miklos Szeredi <[email protected]>
When writing back pages while using writeback caching the code did a copy of data into temporary pages to avoid a deadlock in reclaiming of memory. This is an adaptation and backport of a patch by Joanne Koong [email protected]. Since we use pinned memory with io_uring we don't need the temporary copies and we don't use the AS_WRITEBACK_MAY_DEADLOCK_ON_RECLAIM flag in the pagemap. Link: https://www.spinics.net/lists/linux-mm/msg407405.html Signed-off-by: Horst Birthelmer <[email protected]>
bsbernd
approved these changes
Sep 11, 2025
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
No description provided.