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utils::shm: allow 2M hugepages on demand
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parent
487b572aa6
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2b674d4d8c
@ -15,6 +15,7 @@
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#ifdef __linux__
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#ifdef __linux__
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#include <sys/syscall.h>
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#include <sys/syscall.h>
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#include <linux/memfd.h>
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#ifdef __NR_memfd_create
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#ifdef __NR_memfd_create
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#elif __x86_64__
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#elif __x86_64__
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@ -216,7 +217,19 @@ namespace utils
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m_handle = ::CreateFileMappingW(INVALID_HANDLE_VALUE, NULL, PAGE_EXECUTE_READWRITE, 0, m_size, NULL);
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m_handle = ::CreateFileMappingW(INVALID_HANDLE_VALUE, NULL, PAGE_EXECUTE_READWRITE, 0, m_size, NULL);
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verify(HERE), m_handle != INVALID_HANDLE_VALUE;
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verify(HERE), m_handle != INVALID_HANDLE_VALUE;
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#elif __linux__
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#elif __linux__
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m_file = ::memfd_create_("", 0);
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m_file = -1;
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#ifdef MFD_HUGETLB
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// Try to use 2MB pages for 2M-aligned shm
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if (m_size % 0x200000 == 0 && flags & 2)
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{
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m_file = ::memfd_create_("2M", MFD_HUGETLB | MFD_HUGE_2MB);
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}
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#endif
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if (m_file == -1)
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{
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m_file = ::memfd_create_("", 0);
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}
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verify(HERE), m_file >= 0;
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verify(HERE), m_file >= 0;
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verify(HERE), ::ftruncate(m_file, m_size) >= 0;
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verify(HERE), ::ftruncate(m_file, m_size) >= 0;
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#else
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#else
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