dovecot-2.0: ioloop: Use -1 for infinite poll/epoll timeout rath...

[dovecot at dovecot.org]

details:   http://hg.dovecot.org/dovecot-2.0/rev/16ce45dbcb53
changeset: 12578:16ce45dbcb53
user:      Timo Sirainen <tss at iki.fi>
date:      Wed Jan 26 21:47:52 2011 +0200
description:
ioloop: Use -1 for infinite poll/epoll timeout rather than INT_MAX.
Should improve performance a tiny bit and also works around a CPU eater bug
in Linux 2.6.37.

diffstat:

 src/lib/ioloop.c |  5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diffs (18 lines):

diff -r fc02e620204d -r 16ce45dbcb53 src/lib/ioloop.c
--- a/src/lib/ioloop.c	Tue Jan 25 00:32:50 2011 +0200
+++ b/src/lib/ioloop.c	Wed Jan 26 21:47:52 2011 +0200
@@ -252,11 +252,12 @@
 	item = priorityq_peek(ioloop->timeouts);
 	timeout = (struct timeout *)item;
 	if (timeout == NULL) {
-		/* no timeouts. give it INT_MAX msecs. */
+		/* no timeouts. use INT_MAX msecs for timeval and
+		   return -1 for poll/epoll infinity. */
 		tv_r->tv_sec = INT_MAX / 1000;
 		tv_r->tv_usec = 0;
 		ioloop->next_max_time = (1ULL << (TIME_T_MAX_BITS-1)) - 1;
-		return INT_MAX;
+		return -1;
 	}
 
 	tv_now.tv_sec = 0;