Enum dpdk_unix::android_linux::TransparentHugePageSharedMemoryChoice

pub enum TransparentHugePageSharedMemoryChoice {
    Never,
    Always,
    WithinSize,
    Advise,
    Deny,
    Force,
}

Transparent Huge Page (THP) shared memory ('shmem') choice.

Used for at least:-

• SysV SHM
• memfds,
• shared anonymous mmaps (of /dev/zero or MAP_ANONYMOUS)
• GPU drivers' DRM objects
• Ashmem

Variants

Never

Never allocate.

Always

Always use.

WithinSize

Only allocate huge page if it will be fully within 'i_size'.

Also for pages so specified by the madvise() (or fadvise()) syscall with the MADV_HUGEPAGE flag.

Advise

Only for pages so specified by the madvise() (or fadvise()) syscall with the MADV_HUGEPAGE flag.

Deny

For use in emergencies, to force the huge option off from all mounts.

Force

Force the huge option on for all (very useful for testing).

Trait Implementations

impl Eq for TransparentHugePageSharedMemoryChoice

impl PartialOrd<TransparentHugePageSharedMemoryChoice> for TransparentHugePageSharedMemoryChoice

fn partial_cmp(     &self,     other: &TransparentHugePageSharedMemoryChoice ) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

#[must_use] fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

#[must_use] fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

#[must_use] fn gt(&self, other: &Rhs) -> bool

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

#[must_use] fn ge(&self, other: &Rhs) -> bool

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

impl Copy for TransparentHugePageSharedMemoryChoice

impl PartialEq<TransparentHugePageSharedMemoryChoice> for TransparentHugePageSharedMemoryChoice

fn eq(&self, other: &TransparentHugePageSharedMemoryChoice) -> bool

This method tests for self and other values to be equal, and is used by ==.

#[must_use] fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl Clone for TransparentHugePageSharedMemoryChoice

fn clone(&self) -> TransparentHugePageSharedMemoryChoice

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Ord for TransparentHugePageSharedMemoryChoice

fn cmp(&self, other: &TransparentHugePageSharedMemoryChoice) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

impl Debug for TransparentHugePageSharedMemoryChoice

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Hash for TransparentHugePageSharedMemoryChoice

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where     H: Hasher,

Feeds a slice of this type into the given [Hasher].