Re: [PATCH 13/23] io-controller: Separate out queue and data

From: Rik van Riel
Date: Mon Aug 31 2009 - 11:28:03 EST

Vivek Goyal wrote:
o So far noop, deadline and AS had one common structure called *_data which
contained both the queue information where requests are queued and also
common data used for scheduling. This patch breaks down this common
structure in two parts, *_queue and *_data. This is along the lines of
cfq where all the reuquests are queued in queue and common data and tunables
are part of data.

o It does not change the functionality but this re-organization helps once
noop, deadline and AS are changed to use hierarchical fair queuing.

o looks like queue_empty function is not required and we can check for
q->nr_sorted in elevator layer to see if ioscheduler queues are empty or

Signed-off-by: Nauman Rafique <nauman@xxxxxxxxxx>
Signed-off-by: Gui Jianfeng <guijianfeng@xxxxxxxxxxxxxx>
Signed-off-by: Vivek Goyal <vgoyal@xxxxxxxxxx>

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

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at