Hi,

--- Marcelo Tosatti <marcelo.tosatti@cyclades.com>

wrote:

Hi guys,

The file Documentation/vm/balance was written by
Kanoj in 2000, and is completly outdated 
to what we have now.

Last paragraph:

pages_min/pages_low/pages_high/low_on_memory/zone_wake_kswapd:

These are
per-zone fields, used to determine when a zone needs
to be balanced. When
the number of pages falls below pages_min, the
hysteric field low_on_memory
gets set. This stays set till the number of free
pages becomes pages_high.
When low_on_memory is set, page allocation requests
will try to free some
pages in the zone (providing GFP_WAIT is set in the
request). Orthogonal
to this, is the decision to poke kswapd to free some
zone pages. That
decision is not hysteresis based, and is done when
the number of free
pages is below pages_low; in which case
zone_wake_kswapd is also set.

Should we just remove it? 

Thats the easy solution; a better one would be if 
some (one | people) volunteer(s) to update that file.

If you do remove it, also consider the files "numa"
and "locking" for removal/updates, I know they are 
also quite out of date.

Thanks.

Kanoj



		
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