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fix: default TILELANG_CLEANUP_TEMP_FILES=1 to avoid shared /tmp conflicts#41486

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vllm-bot merged 4 commits intovllm-project:mainfrom
ssam18:fix/tilelang-shared-tempdir-permission
May 8, 2026
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fix: default TILELANG_CLEANUP_TEMP_FILES=1 to avoid shared /tmp conflicts#41486
vllm-bot merged 4 commits intovllm-project:mainfrom
ssam18:fix/tilelang-shared-tempdir-permission

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@ssam18 ssam18 commented May 1, 2026

TileLang's JIT path routes temp dirs through a hardcoded /tmp/tvm-debug-mode-tempdirs/ whenever TILELANG_CLEANUP_TEMP_FILES is unset, which breaks every user except the first one on a shared host. Setting this env var via os.environ.setdefault in mhc.py (the single import site for tilelang in vLLM) opts into private per-process tempdirs while still letting anyone who actually wants the debug layout export the env var explicitly. Fixes #41410.

@ssam18 ssam18 requested a review from jeejeelee as a code owner May 1, 2026 23:26
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This pull request is from a fork — automated review is disabled. A repository maintainer can comment @claude review to run a one-time review.

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ssam18 commented May 1, 2026

@mgoin could you add the ready label to trigger CI? Thanks.

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Code Review

This pull request refactors the LoRA auxiliary CUDA stream management by making the stream and its getter available globally rather than conditionally. It also introduces a default environment variable setting for TILELANG_CLEANUP_TEMP_FILES to prevent file permission issues on shared hosts. Feedback suggests moving this environment variable configuration to a more central location, such as vllm/envs.py, to ensure it is set before any potential imports of the tilelang library.

Comment thread vllm/model_executor/layers/mhc.py Outdated
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@ssam18 Is the change to base_linear.py here unrelated?

…ts on multi-user hosts

Signed-off-by: Samaresh Kumar Singh <ssam3003@gmail.com>
@ssam18 ssam18 force-pushed the fix/tilelang-shared-tempdir-permission branch from 7a582c5 to 903920d Compare May 2, 2026 01:25
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ssam18 commented May 2, 2026

@ssam18 Is the change to base_linear.py here unrelated?

that LoRA commit was unrelated, leaked in from a stale local main. The branch now has only the TileLang fix

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mgoin commented May 3, 2026

@ssam18 i think this override likely belongs in https://github.com/vllm-project/vllm/blob/main/vllm/env_override.py, since we could be using tilelang in other locations

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ssam18 commented May 3, 2026

@ssam18 i think this override likely belongs in https://github.com/vllm-project/vllm/blob/main/vllm/env_override.py, since we could be using tilelang in other locations

done.

@mgoin mgoin enabled auto-merge (squash) May 8, 2026 00:40
@github-actions github-actions Bot added the ready ONLY add when PR is ready to merge/full CI is needed label May 8, 2026
@vllm-bot vllm-bot merged commit 01b0f3a into vllm-project:main May 8, 2026
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libinta pushed a commit to libinta/vllm that referenced this pull request May 8, 2026
…icts (vllm-project#41486)

Signed-off-by: Samaresh Kumar Singh <ssam3003@gmail.com>
Signed-off-by: Libin Tang <libin.tang@intel.com>
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[Bug]: DSV4 TileLang JIT fails with 'Permission denied: /tmp/tvm-debug-mode-tempdirs/...' on shared multi-user hosts

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