kernel config missing CONFIG_TASK_ options for iotop to work

[Philipp Zabel]

Given the slow primary storage (SD/MMC) on the pandaboard, it would be nice to be able to use iotop to watch I/O usage by processes.
For iotop to work, the kernel configuration is missing the CONFIG_TASK_DELAY_ACCT and CONFIG_TASK_IO_ACCOUNTING options.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-903-omap4 2.6.35-903.19
ProcVersionSignature: Ubuntu 2.6.35-903.19-omap4 2.6.35.3
Uname: Linux 2.6.35-903-omap4 armv7l
Architecture: armel
Date: Sun Dec 26 12:08:11 2010
ProcEnviron:
 LANG=de_DE.utf8
 SHELL=/bin/bash
SourcePackage: linux-ti-omap4

[Ricardo Salveti (rsalveti)]

This bug also affects the current Natty's kernel.

[Ricardo Salveti (rsalveti)]

SRU Justification:

Impact: With linux-image-omap4 kernel the user is unable to use tools like 'iotop', as some important config options are missing for it to work.

Fix: It requires kernel support for CONFIG_TASK_DELAY_ACCT, CONFIG_TASK_IO_ACCOUNTING and CONFIG_TASK_XACCT. All these config settings are already enabled by default at the master branch (e.g. omap 3), but are missing at the ti-omap4 one.

Testcase: With these config options enabled the user is able to open 'iotop' and see what process is consuming more I/O from his system.

[Ricardo Salveti (rsalveti)]

Patch sent for both Maverick and Natty, hopefully to be applied soon.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-ti-omap4 - 2.6.35-1101.4

---------------
linux-ti-omap4 (2.6.35-1101.4) natty; urgency=low

  [ Ricardo Salveti de Araujo ]

  * [Config] enabling CONFIG_TASK_ options for iotop to work
    - LP: #694461
 -- Tim Gardner <email address hidden> Wed, 05 Jan 2011 07:18:15 -0700

[Martin Pitt (pitti)]

Accepted linux-ti-omap4 into maverick-proposed, the package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

[Tobin Davis (gruemaster)]

I have installed the 2.6.35-903.21 kernel from maverick-proposed and tested it with iotop. Everything works ok.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-ti-omap4 - 2.6.35-903.21

---------------
linux-ti-omap4 (2.6.35-903.21) maverick-proposed; urgency=low

  * OMAP: enable CONFIG_TASK_ options for iotop to work
    - LP: #694461

linux-ti-omap4 (2.6.35-903.20) maverick-proposed; urgency=low

  [ Ricardo Salveti de Araujo ]

  * OMAP: DSS2: Use Writeback buffers for GFX as a temporary fix
    - LP: #653002
  * OMAP: DSS2: Fix FIFO Threshold calculations for dispc pipelines
    - LP: #653002
  * OMAP: DSS2: Fix array size which stores dispc fifo sizes
    - LP: #653002
 -- Tim Gardner <email address hidden> Wed, 05 Jan 2011 06:45:45 -0700