julia_gc: compensate for Julia guard pages #5737
Merged
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Outdated suggestions cannot be applied.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.
This avoids triggering Julia's
safe_restore
mechanism completely in my local tests, i.e., avoids causing a segfault by scanning right into the guard pages set up by Julia.Note that this is unrelated to the recently removed
SKIP_GUARD_PAGES
feature which was about adjusting for pthread guard pages, which in practice turns out to be irrelevant for our purposes.I'd like to backport this to stable-4.13 ASAP and then release 4.13.1