From: GNU Libc Maintainers <debian-glibc@lists.debian.org>
Date: Thu, 12 Mar 2020 22:47:03 +0000 (+0000)
Subject: git-single-select-timeout
X-Git-Tag: archive/raspbian/2.30-2+rpi1^2~82
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=898d4ff4df674a09f1b6f956787cfed35ceb58f9;p=glibc.git

git-single-select-timeout

commit fffcbbb0b5ff8864086f7b58fdbb8aa4c71943d0
Author: Richard Braun <rbraun@sceen.net>
Date:   Mon Dec 17 09:57:41 2012 +0000

    Fix _hurd_select for single fd sets

    The function attempts to optimize this case by performing one IPC system call
    with the timeout included among the parameters, but in the absence of a reply,
    it will call mach_msg again with the same timeout later, effectively doubling
    the total timeout of the select/poll call.

    Remove this optimization for the time being.

    * hurd/hurdselect.c (_hurd_select): Always call __io_select with no timeout.


Gbp-Pq: Topic hurd-i386
Gbp-Pq: Name git-single-select-timeout.diff
---

diff --git a/hurd/hurdselect.c b/hurd/hurdselect.c
index 6997b2b73..a5e6e26b9 100644
--- a/hurd/hurdselect.c
+++ b/hurd/hurdselect.c
@@ -236,10 +236,7 @@ _hurd_select (int nfds,
 	  {
 	    int type = d[i].type;
 	    d[i].reply_port = __mach_reply_port ();
-	    err = __io_select (d[i].io_port, d[i].reply_port,
-			       /* Poll only if there's a single descriptor.  */
-			       (firstfd == lastfd) ? to : 0,
-			       &type);
+	    err = __io_select (d[i].io_port, d[i].reply_port, 0, &type);
 	    switch (err)
 	      {
 	      case MACH_RCV_TIMED_OUT: