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authorJeff Law <law@redhat.com>2012-11-28 14:12:28 -0700
committerJeff Law <law@redhat.com>2012-11-28 14:16:12 -0700
commit14bc93a967e62abf8cf2704725b6f76619399f83 (patch)
tree80ddd44c7357253f59d6477ced8266856ee9d247 /sunrpc/svc.c
parentb54eb3cb0a4325975d9b82709865a055bc8da910 (diff)
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[BZ #14889]
* sunrpc/rpc/svc.h (__svc_accept_failed): New prototype. * sunrpc/svc.c: Include time.h. (__svc_accept_failed): New function. * sunrpc/svc_tcp.c (rendezvous_request): If the accept fails for any reason other than EINTR, call __svc_accept_failed. * sunrpc/svc_udp.c (svcudp_recv): Similarly. * sunrpc/svc_unix.c (rendezvous_request): Similarly.
Diffstat (limited to 'sunrpc/svc.c')
-rw-r--r--sunrpc/svc.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/sunrpc/svc.c b/sunrpc/svc.c
index 103770a42c..736d4a974c 100644
--- a/sunrpc/svc.c
+++ b/sunrpc/svc.c
@@ -4,6 +4,23 @@
* There are two sets of procedures here. The xprt routines are
* for handling transport handles. The svc routines handle the
* list of service routines.
+ * Copyright (C) 2002-2012 Free Software Foundation, Inc.
+ * This file is part of the GNU C Library.
+ * Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+ *
+ * The GNU C Library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * The GNU C Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the GNU C Library; if not, see
+ * <http://www.gnu.org/licenses/>.
*
* Copyright (c) 2010, Oracle America, Inc.
*
@@ -41,6 +58,7 @@
#include <rpc/svc.h>
#include <rpc/pmap_clnt.h>
#include <sys/poll.h>
+#include <time.h>
#ifdef _RPC_THREAD_SAFE_
#define xports RPC_THREAD_VARIABLE(svc_xports_s)
@@ -544,6 +562,21 @@ svc_getreq_common (const int fd)
}
libc_hidden_nolink_sunrpc (svc_getreq_common, GLIBC_2_2)
+/* If there are no file descriptors available, then accept will fail.
+ We want to delay here so the connection request can be dequeued;
+ otherwise we can bounce between polling and accepting, never giving the
+ request a chance to dequeue and eating an enormous amount of cpu time
+ in svc_run if we're polling on many file descriptors. */
+void
+__svc_accept_failed (void)
+{
+ if (errno == EMFILE)
+ {
+ struct timespec ts = { .tv_sec = 0, .tv_nsec = 50000000 };
+ __nanosleep (&ts, NULL);
+ }
+}
+
#ifdef _RPC_THREAD_SAFE_
void