Re: [PATCH 02/23] io-controller: Core of the elevator fair queuing

From: Rik van Riel
Date: Fri Aug 28 2009 - 18:27:57 EST

Vivek Goyal wrote:
o This is core of the io scheduler implemented at elevator layer. This is a mix
of cpu CFS scheduler and CFQ IO scheduler. Some of the bits from CFS have
to be derived so that we can support hierarchical scheduling. Without
cgroups or with-in group, we should essentially get same behavior as CFQ.

o This patch only shows non-hierarchical bits. Hierarhical code comes in later

o This code is the building base of introducing fair queuing logic in common
elevator layer so that it can be used by all the four IO schedulers.

Signed-off-by: Fabio Checconi <fabio@xxxxxxxxxxxxxxxx>
Signed-off-by: Paolo Valente <paolo.valente@xxxxxxxxxx>
Signed-off-by: Nauman Rafique <nauman@xxxxxxxxxx>
Signed-off-by: Vivek Goyal <vgoyal@xxxxxxxxxx>

Acked-by: Rik van Riel <riel@xxxxxxxxxx>

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