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authorJonas Faklkevik <[email protected]>2011-05-02 20:10:05 +0200
committerJonas Falkevik <[email protected]>2011-05-02 20:10:05 +0200
commit1307af30ec3e2bfaeeca45a63fbc944791662226 (patch)
tree28cc619f87f3603b2528ef7f14e1eabeca1b9e9c /erts/doc/src
parent0e752dde5e322373055c810386353e1d2cc61836 (diff)
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Teach run_erl RUN_ERL_DISABLE_FLOWCNTRL for disabling flow control
Flow control can cause unwanted behaviour of the beam process, if accidentally hit Ctrl-S (instead of Ctrl-D to detach) the entire beam may be blocked. Fix this problem by making it possible to turn off flow control by setting the environment variable RUN_ERL_DISABLE_FLOWCNTRL.
Diffstat (limited to 'erts/doc/src')
-rw-r--r--erts/doc/src/run_erl.xml8
1 files changed, 8 insertions, 0 deletions
diff --git a/erts/doc/src/run_erl.xml b/erts/doc/src/run_erl.xml
index 7bf7f559c5..da08859c7b 100644
--- a/erts/doc/src/run_erl.xml
+++ b/erts/doc/src/run_erl.xml
@@ -144,6 +144,14 @@
<item>The size (in bytes) of a log file before switching to a
new log file. Default is 100000, minimum is 1000 and maximum is
approximately 2^30.</item>
+ <tag>RUN_ERL_DISABLE_FLOWCNTRL</tag>
+ <item>If defined, disables input and output flow control for the pty opend by run_erl.
+ Useful if you want to remove any risk of accidentally blocking the flow control
+ by hit Ctrl-S (instead of Ctrl-D to detach).
+ Which may result in blocking of the entire beam process
+ and in the case of running heart as supervisor
+ even the heart process will be blocked when writing log message to terminal.
+ Leaving the heart process unable to do its work.</item>
</taglist>
</section>