#[repr(i32)]
#[non_exhaustive]
pub enum MmapAdvise {
Show 17 variants MADV_NORMAL, MADV_RANDOM, MADV_SEQUENTIAL, MADV_WILLNEED, MADV_DONTNEED, MADV_REMOVE, MADV_DONTFORK, MADV_DOFORK, MADV_HWPOISON, MADV_MERGEABLE, MADV_UNMERGEABLE, MADV_SOFT_OFFLINE, MADV_HUGEPAGE, MADV_NOHUGEPAGE, MADV_DONTDUMP, MADV_DODUMP, MADV_FREE,
}
Expand description

Usage information for a range of memory to allow for performance optimizations by the kernel.

Used by madvise.

Variants (Non-exhaustive)

This enum is marked as non-exhaustive
Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

MADV_NORMAL

No further special treatment. This is the default.

MADV_RANDOM

Expect random page references.

MADV_SEQUENTIAL

Expect sequential page references.

MADV_WILLNEED

Expect access in the near future.

MADV_DONTNEED

Do not expect access in the near future.

MADV_REMOVE

Free up a given range of pages and its associated backing store.

MADV_DONTFORK

Do not make pages in this range available to the child after a fork(2).

MADV_DOFORK

Undo the effect of MADV_DONTFORK.

MADV_HWPOISON

Poison the given pages.

Subsequent references to those pages are treated like hardware memory corruption.

MADV_MERGEABLE

Enable Kernel Samepage Merging (KSM) for the given pages.

MADV_UNMERGEABLE

Undo the effect of MADV_MERGEABLE

MADV_SOFT_OFFLINE

Preserve the memory of each page but offline the original page.

MADV_HUGEPAGE

Enable Transparent Huge Pages (THP) for pages in the given range.

MADV_NOHUGEPAGE

Undo the effect of MADV_HUGEPAGE.

MADV_DONTDUMP

Exclude the given range from a core dump.

MADV_DODUMP

Undo the effect of an earlier MADV_DONTDUMP.

MADV_FREE

Specify that the application no longer needs the pages in the given range.

Trait Implementations

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This method tests for !=.

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This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

Auto Trait Implementations

Blanket Implementations

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