Jian Wen 22b1710252 Use posix_fallocate() to reserve disk space for shared memory (#161910) ...

Shared memory is allocated by creating a file in /dev/shm (by default) that can run out of space. Pytorch reserves the file size by calling ftruncate() that creates a sparse file, so it succeeds even if sufficient disk space is not available.

This could lead to a situation when a shared memory region is successfully created but a subsequent access to a shared memory page results in SIGBUS due to the disk being full.

Using posix_fallocate() instead of ftruncate() eliminates this problem because the former syscall always allocates space and it returns an error if the disk is full.

Related to https://github.com/pytorch/pytorch/issues/5040
Pull Request resolved: https://github.com/pytorch/pytorch/pull/161910
Approved by: https://github.com/mikaylagawarecki

2025-10-02 19:12:57 +00:00

..

External

[ROCm] Fix environment variable AOTRITON_INSTALLED_PREFIX (#163373)

2025-09-22 15:01:18 +00:00

Modules

[Intel GPU] Upgrade OneDNN XPU Tag to v3.9.1 (#161932)

2025-09-04 11:05:10 +00:00

Modules_CUDA_fix

[2/N] Remove FindPackageHandleStandardArgs.cmake (#156559)

2025-07-24 02:34:10 +00:00

public

Move prioritized text linker optimization code from setup.py to cmake (#160078)

2025-09-18 17:09:48 +00:00

Allowlist.cmake

Replace whitelist with allowlist (#42067)

2020-07-28 08:01:16 -07:00

BLAS_ABI.cmake

[submodule] Bump fbgemm to latest (#158210)

2025-08-11 13:48:02 +00:00

BuildVariables.cmake

Remove Caffe2_MAIN_LIBS (#38408)

2020-05-15 12:27:15 -07:00

Caffe2Config.cmake.in

xpu: improve error handling and reporting in XPU cmake files (#149353)

2025-03-20 02:00:39 +00:00

cmake_uninstall.cmake.in

Formatting cmake (to lowercase without space for if/elseif/else/endif) (#35521)

2020-03-27 14:25:17 -07:00

Codegen.cmake

[ATen][CUDA] CUTLASS matmuls: add sm_103a flag (#162956)

2025-09-16 10:29:55 +00:00

DebugHelper.cmake

[BE] fix typos in cmake/ (#156079)

2025-06-17 19:25:43 +00:00

Dependencies.cmake

Use posix_fallocate() to reserve disk space for shared memory (#161910)

2025-10-02 19:12:57 +00:00

FlatBuffers.cmake

[pytorch][PR] Add ability for a mobile::Module to save as flatbuffer (#70201)

2022-01-12 16:30:39 -08:00

IncludeSource.cpp.in

CMake: Include instead of copying cpu kernel files (#67656)

2021-11-30 19:13:53 -08:00

iOS.cmake

[BE] fix typos in cmake/ (#156079)

2025-06-17 19:25:43 +00:00

Metal.cmake

[Build] Allow metal shaders to include ATen headers (#156256)

2025-06-18 01:03:25 +00:00

MiscCheck.cmake

[submodule] Bump fbgemm to latest (#158210)

2025-08-11 13:48:02 +00:00

prioritized_text.txt

Revert "[BE] Remove HermeticPyObjectTLS and Simplify PythonOpRegistrationTrampoline (#163464)"

2025-09-30 18:20:20 +00:00

ProtoBuf.cmake

[Reland] Use 3.27 as the minimum CMake version (#154783)

2025-06-14 16:37:51 +00:00

ProtoBufPatch.cmake

Migrate PyTorch to C++17 (#85969)

2022-12-08 02:27:48 +00:00

Summary.cmake

[CMake] Fix USE_FBGEMM_GENAI option (#164165)

2025-09-30 02:38:03 +00:00

TorchConfig.cmake.in

Revert "Simplify nvtx3 CMake handling, always use nvtx3 (#153784)"

2025-06-24 20:02:07 +00:00

TorchConfigVersion.cmake.in

Formatting cmake (to lowercase without space for if/elseif/else/endif) (#35521)

2020-03-27 14:25:17 -07:00

VulkanCodegen.cmake

[BE][CMake] Use FindPython module (#124613)

2024-05-29 13:17:35 +00:00

VulkanDependencies.cmake

[Vulkan] Remove GLSL Code Gen (#91912)

2023-01-10 20:29:47 +00:00