Re: [PATCH 8/8] vmscan: Kick flusher threads to clean pages whenreclaim is encountering dirty pages

From: Wu Fengguang
Date: Tue Jul 27 2010 - 10:34:53 EST

> If you plan to keep wakeup_flusher_threads(), a simpler form may be
> sufficient, eg.
> laptop_mode ? 0 : (nr_dirty * 16)

This number is not sensitive because the writeback code may well round
it up to some more IO efficient value (currently 4MB). AFAIK the
nr_pages parameters passed by all existing flusher callers are some
rule-of-thumb value, and far from being an exact number.

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