sys::mman: adding few madvise flags. #2559
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
|
@SteveLauC is it ok if, eventually, I do not add new tests there is no previous madvise test. |
Yeah, I think so. Having tests is great, but Nix, as a wrapper crate, only needs to ensure the wrappers work. These flags are just constants, not syscalls, they are guarded by the libc crate, so it is ok not to have tests for every constant 😄 |
- `MADV_PAGEOUT` which reclaim the address range, swapping it out if the page is anonymous or written back to disk if it's backed up by a file. - `MADV_COLD` which deactivate the address range but as a hint. - `MADV_WIPEONFORK` after `fork()`, the address range is wiped out to avoid sharing sensible data between processes. - `MADV_KEEPONFORK` disables `MADV_WIPEONFORK` workflow.
devnexen
force-pushed
the
mman_onfork
branch
from
3bc60a8 to
ee8b129
Compare
SteveLauC
reviewed
Dec 13, 2024
SteveLauC
approved these changes
Dec 13, 2024
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
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Outdated suggestions cannot be applied.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.
MADV_PAGEOUTwhich reclaim the address range, swapping it out if the page is anonymous or written back to disk if it's backed up by a file.MADV_COLDwhich deactivate the address range but as a hint.MADV_WIPEONFORKafterfork(), the address range is wiped out to avoid sharing sensible data between processes.MADV_KEEPONFORKdisablesMADV_WIPEONFORKworkflow.