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Add AUTO_HUGEPAGE feature to disable writing to nr_hugepages #2391

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Add AUTO_HUGEPAGE feature to disable writing to nr_hugepages #2391

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5 changes: 5 additions & 0 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,7 @@ option(WITH_VAES "Enable VAES instructions for Cryptonight" ON)
option(WITH_BENCHMARK "Enable builtin RandomX benchmark and stress test" ON)
option(WITH_SECURE_JIT "Enable secure access to JIT memory" OFF)
option(WITH_DMI "Enable DMI/SMBIOS reader" ON)
option(WITH_AUTO_HUGEPAGE "Enable Automatic setting of nr_hugepages (Linux Only)" ON)

option(BUILD_STATIC "Build static binary" OFF)
option(ARM_V8 "Force ARMv8 (64 bit) architecture, use with caution if automatic detection fails, but you sure it may work" OFF)
Expand Down Expand Up @@ -181,6 +182,10 @@ else()
if (XMRIG_OS_ANDROID)
set(EXTRA_LIBS pthread rt dl log)
elseif (XMRIG_OS_LINUX)
if (WITH_AUTO_HUGEPAGE)
add_definitions(/DXMRIG_FEATURE_AUTO_HUGEPAGE)
endif()

list(APPEND SOURCES_OS
src/crypto/common/LinuxMemory.h
src/crypto/common/LinuxMemory.cpp
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4 changes: 4 additions & 0 deletions src/crypto/common/LinuxMemory.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -60,7 +60,11 @@ bool xmrig::LinuxMemory::reserve(size_t size, uint32_t node, size_t hugePageSize
return false;
}

# ifdef XMRIG_FEATURE_AUTO_HUGEPAGE
return write_nr_hugepages(node, hugePageSize, std::max<size_t>(nr_hugepages(node, hugePageSize), 0) + (required - available));
# else
return false;
# endif
}


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