kernel/relay.c: a strange usage of delayed_work

[Oleg Nesterov]

relay_switch_subbuf() does schedule_delayed_work(&buf->wake_readers, 1),
wakeup_readers() only does wake_up_interruptible() and nothing more.

Why can't we use a plain timer for this?

In any case, this "wake_up ->read_wait after a minimal possible delay"
looks somewhat strange to me, could you explain? just curious.

Oleg.

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