Function oom_recent 

pub fn oom_recent(
    count: u64,
    seen: Option<(u64, u64)>,
    now: u64,
) -> (bool, (u64, u64))

Whether the kernel’s OOM count says a kill is recent, and what to keep: the count and when it last rose. The counter is cumulative since boot, so a kill counts as recent when the count rose since the last look, or rose within OOM_RECENT_S; a first look that finds kills cannot date them and counts them as recent. The record lives in the runtime directory, which a reboot clears with the counter.