doc: add info on what's used for fswatch on AIX

Info is provided on for the other OS's. Add similar level of info for AIX. PR-URL: #6837 Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Santiago Gimeno <[email protected]>
nodejs · Jun 2, 2016 · 72d4692 · 72d4692
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diff --git a/doc/api/fs.md b/doc/api/fs.md
@@ -1459,6 +1459,7 @@ to be notified of filesystem changes.
 * On OS X, this uses `kqueue` for files and 'FSEvents' for directories.
 * On SunOS systems (including Solaris and SmartOS), this uses `event ports`.
 * On Windows systems, this feature depends on `ReadDirectoryChangesW`.
+* On Aix systems, this feature depends on `AHAFS`, which must be enabled.
 
 If the underlying functionality is not available for some reason, then
 `fs.watch` will not be able to function. For example, watching files or