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Deal with very old linux kernels

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MADV_HUGEPAGE might not be available, for kernels before 2.6.38 (released 2011). Just skip the madvise.

closes https://github.com/official-stockfish/Stockfish/pull/3039

No functional change
This commit is contained in:
Joost VandeVondele
2020-08-21 07:42:19 +02:00
parent daac86691d
commit 8b45b1c490
1 changed files with 2 additions and 0 deletions
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src/misc.cpp
+2
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@@ -367,7 +367,9 @@ void* aligned_ttmem_alloc(size_t allocSize, void*& mem) {
size_t size = ((allocSize + alignment - 1) / alignment) * alignment; // multiple of alignment size_t size = ((allocSize + alignment - 1) / alignment) * alignment; // multiple of alignment
if (posix_memalign(&mem, alignment, size)) if (posix_memalign(&mem, alignment, size))
mem = nullptr; mem = nullptr;
#if defined(MADV_HUGEPAGE)
madvise(mem, allocSize, MADV_HUGEPAGE); madvise(mem, allocSize, MADV_HUGEPAGE);
#endif
return mem; return mem;
} }