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From: Jilles Tjoelker <jilles@FreeBSD.org>
Date: Tue, 14 Jan 2014 22:05:33 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r260652 - in head/lib/libc: include resolv
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X-List-Received-Date: Tue, 14 Jan 2014 22:05:33 -0000
Author: jilles
Date: Tue Jan 14 22:05:33 2014
New Revision: 260652
URL: http://svnweb.freebsd.org/changeset/base/260652
Log:
libc/resolv: Use poll() instead of kqueue().
The resolver in libc creates a kqueue for watching a single file descriptor.
This can be done using poll() which should be lighter on the kernel and
reduce possible problems with rlimits (file descriptors, kqueues).
Reviewed by: jhb
Modified:
head/lib/libc/include/port_before.h
head/lib/libc/resolv/res_send.c
Modified: head/lib/libc/include/port_before.h
==============================================================================
--- head/lib/libc/include/port_before.h Tue Jan 14 21:35:25 2014 (r260651)
+++ head/lib/libc/include/port_before.h Tue Jan 14 22:05:33 2014 (r260652)
@@ -5,7 +5,7 @@
#define _LIBC 1
#define DO_PTHREADS 1
-#define USE_KQUEUE 1
+#define USE_POLL 1
#define ISC_SOCKLEN_T socklen_t
#define ISC_FORMAT_PRINTF(fmt, args) \
Modified: head/lib/libc/resolv/res_send.c
==============================================================================
--- head/lib/libc/resolv/res_send.c Tue Jan 14 21:35:25 2014 (r260651)
+++ head/lib/libc/resolv/res_send.c Tue Jan 14 22:05:33 2014 (r260652)
@@ -77,7 +77,7 @@ __FBSDID("$FreeBSD$");
*/
#include "port_before.h"
-#ifndef USE_KQUEUE
+#if !defined(USE_KQUEUE) && !defined(USE_POLL)
#include "fd_setsize.h"
#endif
@@ -963,7 +963,7 @@ send_dg(res_state statp,
timeout.tv_nsec/1000000;
pollfd.fd = s;
pollfd.events = POLLRDNORM;
- n = poll(&pollfd, 1, polltimeout);
+ n = _poll(&pollfd, 1, polltimeout);
#endif /* USE_POLL */
if (n == 0) {