From: Vivek Goyal <vgoyal@redhat.com>
Date: Thu, 3 Dec 2009 17:59:45 +0000 (-0500)
Subject: blkio: Group time used accounting and workload context save restore
X-Git-Tag: v2.6.33-rc1~379^2~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dae739ebc4c590630039533a5bbd05865966094f;p=pandora-kernel.git

blkio: Group time used accounting and workload context save restore

o This patch introduces the functionality to do the accounting of group time
  when a queue expires. This time used decides which is the group to go
  next.

o Also introduce the functionlity to save and restore the workload type
  context with-in group. It might happen that once we expire the cfq queue
  and group, a different group will schedule in and we will lose the context
  of the workload type. Hence save and restore it upon queue expiry.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
---

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