Enum rustix::mm::Advice

source · [−]

#[repr(u32)]
#[non_exhaustive]
pub enum Advice {
Show 23 variants    Normal,
    Sequential,
    Random,
    WillNeed,
    LinuxDontNeed,
    LinuxFree,
    LinuxRemove,
    LinuxDontFork,
    LinuxDoFork,
    LinuxHwPoison,
    LinuxSoftOffline,
    LinuxMergeable,
    LinuxUnmergeable,
    LinuxHugepage,
    LinuxNoHugepage,
    LinuxDontDump,
    LinuxDoDump,
    LinuxWipeOnFork,
    LinuxKeepOnFork,
    LinuxCold,
    LinuxPageOut,
    LinuxPopulateRead,
    LinuxPopulateWrite,
}

Available on crate feature mm only.

Expand description

POSIX_MADV_* constants for use with 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.

`Normal`

POSIX_MADV_NORMAL

`Sequential`

POSIX_MADV_SEQUENTIAL

`Random`

POSIX_MADV_RANDOM

`WillNeed`

POSIX_MADV_WILLNEED

`LinuxDontNeed`

MADV_DONTNEED

`LinuxFree`

MADV_FREE (since Linux 4.5)

`LinuxRemove`

MADV_REMOVE

`LinuxDontFork`

MADV_DONTFORK

`LinuxDoFork`

MADV_DOFORK

`LinuxHwPoison`

MADV_HWPOISON

`LinuxSoftOffline`

MADV_SOFT_OFFLINE

`LinuxMergeable`

MADV_MERGEABLE

`LinuxUnmergeable`

MADV_UNMERGEABLE

`LinuxHugepage`

MADV_HUGEPAGE (since Linux 2.6.38)

`LinuxNoHugepage`

MADV_NOHUGEPAGE (since Linux 2.6.38)

`LinuxDontDump`

MADV_DONTDUMP (since Linux 3.4)

`LinuxDoDump`

MADV_DODUMP (since Linux 3.4)

`LinuxWipeOnFork`

MADV_WIPEONFORK (since Linux 4.14)

`LinuxKeepOnFork`

MADV_KEEPONFORK (since Linux 4.14)

`LinuxCold`

MADV_COLD (since Linux 5.4)

`LinuxPageOut`

MADV_PAGEOUT (since Linux 5.4)

`LinuxPopulateRead`

MADV_POPULATE_READ (since Linux 5.14)

`LinuxPopulateWrite`

MADV_POPULATE_WRITE (since Linux 5.14)

Implementations

source

impl Advice

source

pub const DontNeed: Self = Self::Normal

POSIX_MADV_DONTNEED

On Linux, this is mapped to POSIX_MADV_NORMAL because Linux’s MADV_DONTNEED differs from POSIX_MADV_DONTNEED. See LinuxDontNeed for the Linux behavior.