linux-toradex.git/block/Kconfig.iosched, branch tegra

blk-cgroup: config options re-arrangement

2010-04-26T17:27:56+00:00

This patch fixes few usability and configurability issues.

o All the cgroup based controller options are configurable from
  "Genral Setup/Control Group Support/" menu. blkio is the only exception.
  Hence make this option visible in above menu and make it configurable from
  there to bring it inline with rest of the cgroup based controllers.

o Get rid of CONFIG_DEBUG_CFQ_IOSCHED.

  This option currently does two things.

  - Enable printing of cgroup paths in blktrace
  - Enables CONFIG_DEBUG_BLK_CGROUP, which in turn displays additional stat
    files in cgroup.

  If we are using group scheduling, blktrace data is of not really much use
  if cgroup information is not present. To get this data, currently one has to
  also enable CONFIG_DEBUG_CFQ_IOSCHED, which in turn brings the overhead of
  all the additional debug stat files which is not desired.

  Hence, this patch moves printing of cgroup paths under
  CONFIG_CFQ_GROUP_IOSCHED.

  This allows us to get rid of CONFIG_DEBUG_CFQ_IOSCHED completely. Now all
  the debug stat files are controlled only by CONFIG_DEBUG_BLK_CGROUP which
  can be enabled through config menu.

Signed-off-by: Vivek Goyal 
Acked-by: Divyesh Shah 
Reviewed-by: Gui Jianfeng 
Signed-off-by: Jens Axboe

cgroups: blkio subsystem as module

2010-03-12T23:52:36+00:00

Modify the Block I/O cgroup subsystem to be able to be built as a module.
As the CFQ disk scheduler optionally depends on blk-cgroup, config options
in block/Kconfig, block/Kconfig.iosched, and block/blk-cgroup.h are
enhanced to support the new module dependency.

Signed-off-by: Ben Blum 
Cc: Li Zefan 
Cc: Paul Menage 
Cc: "David S. Miller" 
Cc: KAMEZAWA Hiroyuki 
Cc: Lai Jiangshan 
Cc: Vivek Goyal 
Cc: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

blkio: Allow CFQ group IO scheduling even when CFQ is a module

2009-12-04T15:38:14+00:00

o Now issues of blkio controller and CFQ in module mode should be fixed.
  Enable the cfq group scheduling support in module mode.

Signed-off-by: Vivek Goyal 
Signed-off-by: Jens Axboe

io controller: quick fix for blk-cgroup and modular CFQ

2009-12-04T09:07:38+00:00

It's currently not an allowed configuration, so express that in Kconfig.

Signed-off-by: Jens Axboe

blkio: Some debugging aids for CFQ

2009-12-03T18:28:52+00:00

o Some debugging aids for CFQ.

Signed-off-by: Vivek Goyal 
Signed-off-by: Jens Axboe

blkio: Introduce per cfq group weights and vdisktime calculations

2009-12-03T18:28:52+00:00

o Bring in the per cfq group weight and how vdisktime is calculated for the
  group. Also bring in the functionality of updating the min_vdisktime of
  the group service tree.

Signed-off-by: Vivek Goyal 
Signed-off-by: Jens Axboe

blkio: Introduce blkio controller cgroup interface

2009-12-03T18:28:51+00:00

o This is basic implementation of blkio controller cgroup interface. This is
  the common interface visible to user space and should be used by different
  IO control policies as we implement those.

Signed-off-by: Vivek Goyal 
Signed-off-by: Jens Axboe

block: CFQ is more than a desktop scheduler

2009-10-03T07:40:47+00:00

Update Kconfig.iosched entry.

Signed-off-by: Jens Axboe

block: remove the anticipatory IO scheduler

2009-10-03T07:37:51+00:00

AS is mostly a subset of CFQ, so there's little point in still
providing this separate IO scheduler. Hopefully at some point we
can get down to one single IO scheduler again, at least this brings
us closer by having only one intelligent IO scheduler.

Signed-off-by: Jens Axboe

update I/O sched Kconfig help texts - CFQ is now default, not AS.

2007-02-17T19:08:22+00:00

Change I/O scheduler description to correctly show CFQ as being the default
scheduler and not the anticipatory scheduler that previously was default.

Signed-off-by: Jesper Juhl 
Signed-off-by: Adrian Bunk