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Fix syslog mutual exclusion and interrupt level logic

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git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4999 7fd9a85b-ad96-42d3-883c-3090e2eb8679
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patacongo
2012-08-02 18:43:01 +00:00
parent 30e820d861
commit a9ba8355fb
6 changed files with 132 additions and 38 deletions
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nuttx/Documentation/NuttxPortingGuide.html
+6 -5
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@@ -4101,6 +4101,7 @@ build
<li>
<code>CONFIG_SYSLOG_CHAR</code>:
Enable the generic character device for the SYSLOG.
A disadvantage of using the generic character device for the SYSLOG is that it cannot handle debug output generated from interrupt level handlers.
NOTE: No more than one SYSLOG device should be configured.
<p>
Alternatively, a circular buffer in RAM can be used as the SYSLOGing device.
@@ -4118,11 +4119,11 @@ build
circular buffer and can be viewed using the NSH 'dmesg' command.
</li>
<li>
<code>CONFIG_RAMLOG_SYSLOG</code>: Use the RAM logging device for the syslogging
interface. If this feature is enabled (along with <code>CONFIG_SYSLOG</code>),
then all debug output (only) will be re-directed to the circular
buffer in RAM. This RAM log can be view from NSH using the 'dmesg'
command.
<code>CONFIG_RAMLOG_SYSLOG</code>:
Use the RAM logging device for the syslogging interface.
If this feature is enabled (along with <code>CONFIG_SYSLOG</code>), then all debug output (only) will be re-directed to the circular buffer in RAM.
This RAM log can be view from NSH using the <code>dmesg</code> command.
NOTE: Unlike the limited, generic character driver SYSLOG device, the RAMLOG <i>can</i> be used to generate debug output from interrupt level handlers.
</li>
<li>
<code>CONFIG_RAMLOG_NPOLLWAITERS</code>: The number of threads than can be waiting