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[dm-devel] Re: [PATCH 03/23] io-controller: Common flat fair queuing code in elevaotor layer

Vivek Goyal wrote:
This is common fair queuing code in elevator layer. This is controlled by
config option CONFIG_ELV_FAIR_QUEUING. This patch initially only introduces
flat fair queuing support where there is only one group, "root group" and all
the tasks belong to root group.

This elevator layer changes are backward compatible. That means any ioscheduler
using old interfaces will continue to work.

This is essentially a lot of CFQ logic moved into common layer so that other
IO schedulers can make use of that in hierarhical scheduling setup.

Signed-off-by: Nauman Rafique <nauman google com>
Signed-off-by: Fabio Checconi <fabio gandalf sssup it>
Signed-off-by: Paolo Valente <paolo valente unimore it>
Signed-off-by: Aristeu Rozanski <aris redhat com>
Signed-off-by: Gui Jianfeng <guijianfeng cn fujitsu com>
Signed-off-by: Vivek Goyal <vgoyal redhat com>

Acked-by: Rik van Riel <riel redhat com>

All rights reversed.

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