some old glibc may define MSG_ZEROCOPY but not SO_ZEROCOPY :-(

3 years ago · 3262a8dbf6
parent 782cbd81b4
commit 3262a8dbf6
1 changed files with 1 additions and 1 deletions
--- a/io/iob_send.c
+++ b/io/iob_send.c
@ -234,7 +234,7 @@ eagain:
 	else
 	  sent=writev(s,v,headers);
      } else {
-#ifdef MSG_ZEROCOPY
+#if defined(MSG_ZEROCOPY) && defined(SO_ZEROCOPY)
 	  if (!nozerocopy && sum>=8*1024) {
 	    /* MSG_ZEROCOPY has page table management overhead,
 	     * it only pays off after 8k or so */