8000 On linux, __rust_probestack shouldn't be called on smallish stack allocations · Issue #74405 · rust-lang/rust · GitHub
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On linux, __rust_probestack shouldn't be called on smallish stack allocations #74405
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On linux, __rust_probestack shouldn't be called on smallish stack allocations#74405
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A-LLVMArea: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.C-enhancementCategory: An issue proposing an enhancement or a PR with one.T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.
@KyleSiefring

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@KyleSiefring
KyleSiefring
opened on Jul 16, 2020

On linux (x86_64), had a stack allocation that was "only" 8*4096 bytes causing __rust_probestack to be called. From what I understand from this, #43072, linux only needs to have the stack probed for much larger sizes.

Compiler version: Tested on 1.44.0, but a cursory glance in perf still shows __rust_probestack.

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    A-LLVMArea: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.C-enhancementCategory: An issue proposing an enhancement or a PR with one.T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.

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