https://bugs.dragonflybsd.org/https://bugs.dragonflybsd.org/favicon.ico?16293952082013-03-27T09:51:25ZDragonFlyBSD bugtrackerDragonFlyBSD - Bug #2534: Network connections freeze with heavy email traffichttps://bugs.dragonflybsd.org/issues/2534?journal_id=114222013-03-27T09:51:25Zsepherosa
<ul></ul><p>On Wed, Mar 27, 2013 at 3:42 PM, Francois Tigeot via Redmine<br /><<a class="email" href="mailto:bugtracker-admin@leaf.dragonflybsd.org">bugtracker-admin@leaf.dragonflybsd.org</a>> wrote:</p>
<blockquote>
<p>Issue <a class="issue tracker-1 status-3 priority-4 priority-default closed" title="Bug: Network connections freeze with heavy email traffic (Resolved)" href="https://bugs.dragonflybsd.org/issues/2534">#2534</a> has been reported by ftigeot.</p>
<p>----------------------------------------<br />Bug <a class="issue tracker-1 status-3 priority-4 priority-default closed" title="Bug: Network connections freeze with heavy email traffic (Resolved)" href="https://bugs.dragonflybsd.org/issues/2534">#2534</a>: Network connections freeze with heavy email traffic<br /><a class="external" href="http://bugs.dragonflybsd.org/issues/2534">http://bugs.dragonflybsd.org/issues/2534</a></p>
<p>Author: ftigeot<br />Status: New<br />Priority: Normal<br />Assignee:<br />Category:<br />Target version:</p>
<p>When under heavy load (receiving a stream of mails at 1Gb/s from a LAN machine), network connections freeze on a mail relay machine.<br />This machine is also a PPP/ADSL router.</p>
<p>The console shows this message:<br />Warning, objcache(cluster mbuf): Exhausted!</p>
<p>netstat -m output:<br />5306/4480 mbuf clusters in use (current/max)</p>
<p>Some processes (most often ppp and sendmail) end up in a weird state, as shown by these top outputs:</p>
<p>PID USERNAME NICE SIZE RES STATE CPU TIME CTIME CPU COMMAND<br />1879 root 0 14M 2864K CPU0 0 0:00 0:00 0.34% top<br />260 root 0 24M 2476K tunread 2 0:05 0:05 0.00% ppp</p>
<p>PID USERNAME NICE SIZE RES STATE CPU TIME CTIME CPU COMMAND<br />82699 ftigeot 0 15M 2872K CPU3 3 0:00 0:00 0.39% top<br />265 root 0 25M 1172K objcache 1 154:06 154:06 0.00% ppp</p>
<p>Only a reboot allows the machine to resume network operations.</p>
<p>A core dump is available in leaf:~ftigeot/crash/crash.objcache</p>
</blockquote>
<p>I suggest to test the latest master, many network bugs are fixed since<br />the kernel version that crashed.</p>
<p>Best Regards,<br />sephe</p>
<p>--<br />Tomorrow Will Never Die</p> DragonFlyBSD - Bug #2534: Network connections freeze with heavy email traffichttps://bugs.dragonflybsd.org/issues/2534?journal_id=114232013-03-27T10:19:55Zftigeot
<ul><li><strong>Status</strong> changed from <i>New</i> to <i>Resolved</i></li><li><strong>% Done</strong> changed from <i>0</i> to <i>100</i></li></ul><p>The issue seems to be resolved indeed, I couldn't reproduce it with today's kernel.<br />The current number of mbuf clusters in use doesn't grow bigger than the maximum limit anymore.</p>
<p>Thanks for the tip!</p>