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[dm-devel] Re: [PATCH 10/23] io-controller: Debug hierarchical IO scheduling

From: Rik van Riel <riel redhat com>
To: Vivek Goyal <vgoyal redhat com>
Cc: dhaval linux vnet ibm com, peterz infradead org, dm-devel redhat com, dpshah google com, jens axboe oracle com, agk redhat com, balbir linux vnet ibm com, paolo valente unimore it, jmarchan redhat com, guijianfeng cn fujitsu com, fernando oss ntt co jp, mikew google com, jmoyer redhat com, nauman google com, mingo elte hu, m-ikeda ds jp nec com, lizf cn fujitsu com, fchecconi gmail com, s-uchida ap jp nec com, containers lists linux-foundation org, linux-kernel vger kernel org, akpm linux-foundation org, righi andrea gmail com, torvalds linux-foundation org
Subject: [dm-devel] Re: [PATCH 10/23] io-controller: Debug hierarchical IO scheduling
Date: Sat, 29 Aug 2009 20:10:34 -0400

Vivek Goyal wrote:

o Littile debugging aid for hierarchical IO scheduling.

o Enabled under CONFIG_DEBUG_GROUP_IOSCHED

o Currently it outputs more debug messages in blktrace output which helps
  a great deal in debugging in hierarchical setup. It also creates additional
  cgroup interfaces io.disk_queue and io.disk_dequeue to output some more
  debugging data.

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.

References:
- [dm-devel] [RFC] IO scheduler based IO controller V9
  - From: Vivek Goyal
- [dm-devel] [PATCH 10/23] io-controller: Debug hierarchical IO scheduling
  - From: Vivek Goyal

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