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mmap: try THP via madvise #113

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mmap: try THP via madvise #113

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mmap: try THP via madvise
nmanthey Sep 3, 2020
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THP: introduce options
nmanthey Nov 15, 2020
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2 changes: 2 additions & 0 deletions src/mmap_unix.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -154,6 +154,8 @@ impl MmapRegion {
return Err(Error::Mmap(io::Error::last_os_error()));
}

let _ret = unsafe { libc::madvise(addr, size, libc::MADV_HUGEPAGE) };
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Hi! Apologies for the late reply :( I was just wondering, what's the difference between using this madvise call and providing MAP_HUGETLB as part of flags?

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MAP_HUGETLB uses hugetlbfs, MADV_HUGEPAGE uses transparent huge page for memfd or anonymous mapping.


Ok(Self {
addr: addr as *mut u8,
size,
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