feat: add linear-state block manager and prefix cache (3/n).#1846
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This pull request introduces support for linear-state (Qwen3.5 GDN) live slots by adding the LINEAR block type and implementing corresponding state management methods in Sequence and KVCacheState. It also adds a MOVE_ONLY macro in macros.h. The feedback suggests using emplace_back instead of push_back when adding a slot to the block vector in sequence.h to avoid unnecessary copies, in accordance with the repository style guide.
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Thank you for contributing to xLLM. Before requesting review, please make sure the following items are complete.
PR Title and Commit Messages
<type>: <subject>.Pre-commit Checks
pre-commitby runningpip install pre-commitor an equivalent command.pre-commit install.pre-commit run --all-filesand fixed any reported issues.Self Review
.agents/skills/code-review/references/custom-code-style.md, especially code written or assisted by AI.mainbranch.Build and Test Coverage
python setup.py build testhas passed on a CUDA machine.python setup.py build testhas passed on an NPU machine.python setup.py build testhas passed on an MLU machine.Reviewer Notes
pr说明如下：
https://yingxudeng.github.io/xllm-notes/reports/qwen35-linear-prefix-cache-pr1839/