From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: tcp heisenbug Date: Fri, 8 Oct 2004 01:41:51 -0700 Sender: netdev-bounce@oss.sgi.com Message-ID: <20041008014151.26e17547.akpm@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: netdev@oss.sgi.com Return-path: To: "David S. Miller" Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org I just booted my main workstation into 2.6.9-rc3-mm3 (approx). fetchmail broke. It's fetching mail from localhost (ssh port-forwarded to remote servers) and then for some reason it wants to open an SMTP connection to localhost. It was failing, some error message about that SMTP connection. While I was poking at it, it started to work. `uptime' said 6 minutes. So I'd be suspecting that there's a jiffy wrap bug in TCP-to-localhost introduced since 2.6.9-rc3. I rebooted to do more diagnosis and the damn thing worked fine. I can't see anything suspicious in the post-rc3 net/ diff. But if anyone has fiddled with time-related things in networking, please double-check your work?