Followups: performance counters, ksplice, and fsnotify [LWN.net]

Followups: performance counters, ksplice, and fsnotify

Posted Dec 19, 2008 22:50 UTC (Fri) by oak (subscriber, #2786)
In reply to: Followups: performance counters, ksplice, and fsnotify by stevef
Parent article: Followups: performance counters, ksplice, and fsnotify

> if you are running on a local file system, notify is useful but polling
is not as expensive as it is over a network,

Maybe you were thinking of something tethered to a power cord? For
battery powered devices, polling is evil.

(Before dynticks got into mainstream, Desktop crowd using laptops might
not have noticed / cared, but with dynticks you suddenly start to see how
much less power your laptop uses and how much longer it can run when
polling wakeups get reduced radically.)

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