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vm_native: bypass rpcs3_vm creation if overcommit is enabled (Linux)

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Unfortunately, different systems need different approach here.
This commit is contained in:
Nekotekina 2021-06-12 19:12:59 +03:00
parent cb0929d933
commit 6f874be41b
1 changed files with 18 additions and 1 deletions
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19
rpcs3/util/vm_native.cpp
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@ -428,13 +428,30 @@ namespace utils
m_handle = ensure(::CreateFileMappingW(f.get_handle(), nullptr, PAGE_READWRITE, 0, 0, nullptr));
#else
// TODO: check overcommit configuration of other supported platforms to bypass rpcs3_vm creation
#ifdef __linux__
if (const char c = fs::file("/proc/sys/vm/overcommit_memory").read<char>(); c == '0' || c == '1')
{
// Simply use memfd for overcommit memory
m_file = ::memfd_create_("", 0);
ensure(m_file >= 0);
ensure(::ftruncate(m_file, m_size) >= 0);
return;
}
else
{
fprintf(stderr, "Reading /proc/sys/vm/overcommit_memory: %c", c);
}
#endif
if (!storage.empty())
{
m_file = ::open(storage.c_str(), O_RDWR | O_CREAT, S_IWUSR | S_IRUSR);
}
else
{
m_file = ::open((fs::get_cache_dir() + "rpcs3_vm").c_str(), O_RDWR | O_CREAT, S_IWUSR | S_IRUSR);
m_file = ::open((fs::get_cache_dir() + "rpcs3_vm_sparse.tmp").c_str(), O_RDWR | O_CREAT, S_IWUSR | S_IRUSR);
}
ensure(m_file >= 0);