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-rw-r--r--docs/docbook/smbdotconf/tuning/usesendfile.xml6
1 files changed, 4 insertions, 2 deletions
diff --git a/docs/docbook/smbdotconf/tuning/usesendfile.xml b/docs/docbook/smbdotconf/tuning/usesendfile.xml
index e8b8213ec3..6bbd651549 100644
--- a/docs/docbook/smbdotconf/tuning/usesendfile.xml
+++ b/docs/docbook/smbdotconf/tuning/usesendfile.xml
@@ -2,11 +2,13 @@
context="S"
xmlns:samba="http://samba.org/common">
<listitem>
- <para>If this parameter is <constant>yes</constant>, and the underlying operating
+ <para>If this parameter is <constant>yes</constant>, and Samba
+ was built with the --with-sendfile-support option, and the underlying operating
system supports sendfile system call, then some SMB read calls (mainly ReadAndX
and ReadRaw) will use the more efficient sendfile system call for files that
are exclusively oplocked. This may make more efficient use of the system CPU's
- and cause Samba to be faster.</para>
+ and cause Samba to be faster. This is off by default as it's effects are unknown
+ as yet.</para>
<para>Default: <command moreinfo="none">use sendfile = no</command></para>
</listitem>