Enum XacctState 

#[non_exhaustive]
pub enum XacctState {
    On,
    Off,
    Unknown,
}

Build state of extended task accounting (CONFIG_TASK_XACCT), probed from /proc/config.gz. Gates the taskstats memory watermark fields (hiwater_rss_bytes, hiwater_vm_bytes), which xacct_add_tsk (kernel/tsacct.c) fills whenever CONFIG_TASK_XACCT is built in — there is NO runtime toggle, unlike delay accounting.

Variants (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.

On

/proc/config.gz shows CONFIG_TASK_XACCT=y — watermarks populate (for tasks with an address space; a kernel thread reads zero).

Off

/proc/config.gz shows # CONFIG_TASK_XACCT is not set — not built in, watermarks read zero.

Unknown

/proc/config.gz is unreadable (no CONFIG_IKCONFIG_PROC, or the gz read/parse failed) or the symbol line is absent. Treated as measured (like Self::On) for gating so a host that does not expose its config never produces a false “absent” verdict.

Trait Implementations

impl Clone for XacctState

fn clone(&self) -> XacctState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for XacctState

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for XacctState

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for XacctState

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

Formats the value using the given formatter.

impl PartialEq for XacctState

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

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for XacctState

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for XacctState

impl Eq for XacctState

impl StructuralPartialEq for XacctState