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Bug #1048

closed

Feature #1067: Update writeback instrumentation for newer kernels

global_dirty_limit symbol lookup failed.

Added by Julien Desfossez over 8 years ago. Updated almost 7 years ago.

Status:
Resolved
Priority:
Normal
Assignee:
Michael Jeanson
Target version:
-
Start date:
07/18/2016
Due date:
% Done:

0%

Estimated time:

Description

On Ubuntu 16.04 with the current kernel (4.4.0-31-generic) and lttng-modules current master, we see this message in dmesg:
global_dirty_limit symbol lookup failed.

It can be quite frequent, enough to notice some additional activity on the syslog.
In addition to fixing this issue, we should also make sure it is only output once.

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 #1

Updated by Mathieu Desnoyers about 8 years ago

commit

commit e36de50dd09527901339797a61a0a40d241c1a6d
Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date:   Tue Aug 30 18:42:10 2016 -0400

    Fix: use printk_once() for wrapper warning messages

    Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

takes care of printing it only once.

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 #2

Updated by Jérémie Galarneau about 8 years ago

  • Parent task set to #1067
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 #3

Updated by Mathieu Desnoyers almost 7 years ago

  • Status changed from New to Resolved
  • Assignee set to Michael Jeanson

Fixed by commit:

commit 6284ae7ced3a8c6a4bee55b071d4de74d7400cad
Author: Michael Jeanson <mjeanson@efficios.com>
Date:   Tue Jan 23 16:00:07 2018 -0500

    Fix: global_dirty_limit for kernel v4.2 and up
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