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Posted to commits@gluten.apache.org by "jiangjiangtian (via GitHub)" <gi...@apache.org> on 2026/09/20 09:53:25 UTC
[PR] [GLUTEN-13062][VL] Clamp madvise(MADV_WILLNEED) length against posFetch_ to avoid EINVAL in MmapFileStream [gluten]
jiangjiangtian opened a new pull request, #13063:
URL: https://github.com/apache/gluten/pull/13063
Closes https://github.com/apache/gluten/issues/13062.
The fetch starts at `posFetch_`, so clamp the fetch length against `size_ - posFetch_` instead of `size_ - pos_`. This keeps `posFetch_` either page-aligned or exactly at `size_` (after which no further fetch is needed), so every `madvise()` call receives a page-aligned address and no advised range overruns the mapping.
Besides, after this PR the prefetching will work in all cases, there is a perfermance gain in merging spills of shuffle data.
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Re: [PR] [GLUTEN-13062][VL] Clamp madvise(MADV_WILLNEED) length against posFetch_ to avoid EINVAL in MmapFileStream [gluten]
Posted by "github-actions[bot] (via GitHub) via commits" <co...@gluten.apache.org>.
github-actions[bot] commented on PR #13063:
URL: https://github.com/apache/gluten/pull/13063#issuecomment-6674268267
This PR is stale because it has been open 45 days with no activity. Remove stale label or comment or this will be closed in 10 days.
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