X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fsrc%2Fsmtp_out.c;h=86c3e412775cc53d3feed2f5112864257af69d13;hb=e89d95f1909c0972b0e854ae05f50246f4d727d6;hp=6f7fb85c11a28da11d59de583d0b0ea1b546a43c;hpb=1e1ddfac79fbcd052f199500a6493c7f79cb8462;p=user%2Fhenk%2Fcode%2Fexim.git

diff --git a/src/src/smtp_out.c b/src/src/smtp_out.c
index 6f7fb85c1..86c3e4127 100644
--- a/src/src/smtp_out.c
+++ b/src/src/smtp_out.c
@@ -509,6 +509,16 @@ else
 	      0
 #endif
 	     );
+
+#if defined(__linux__)
+    /* This is a workaround for a current linux kernel bug: as of
+    5.6.8-200.fc31.x86_64  small (<MSS) writes get delayed by about 200ms,
+    This is despite NODELAY being active.
+    https://bugzilla.redhat.com/show_bug.cgi?id=1803806 */
+
+    if (!more)
+      setsockopt(outblock->cctx->sock, IPPROTO_TCP, TCP_CORK, &off, sizeof(off));
+#endif
     }
   }