From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Schlichter Message-ID: <1045485310.3e50d6fe94f1e@rumms.uni-mannheim.de> Date: Mon, 17 Feb 2003 13:35:10 +0100 Subject: Re: 2.5.60-mm2 References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org Return-Path: To: Bill Davidsen Cc: Linux Kernel Mailing List , linux-mm@kvack.org List-ID: Quoting Bill Davidsen : > On Sun, 16 Feb 2003, I wrote: > > > > I've got NFS problems with 2.5.5x - 60-bk3, too, but here I can > workaround > > > them by simply pinging the NFS-server every second... Funny, but it > works! > > > Perhaps this can help finding the real bug?! > > [ let's try this again, not typing in a moving car ] > > > I was looking for network issues when I started timing pings, and didn't > > see any. I thought it was bad timing, like not raining when you have a > > coat, but maybe I was curing it. > > Since it's possible that pings will actually change the problem rather > than measure it, I'll tcpdump for a while and see if that tells me > anything. I suspected network problems, since tcp has priority over udp in > some places. > > I looked at the code last night, but I don't see anything explaining a > ping making things better. Something getting flushed? I'm sorry, I don't exactly know what you want me to do... I'm not involved in the linux net code and I did not even try to understand it yet... I just have a small environment with a FreeBSD 4.6 box using my Linux box as a NFS file server. This worked fine with my 2.4 kernel but with the 2.5.x test kernels I've got the problem the FreeBSD box says 'NFS server not responding' until I do simple pings (ICMP echo request, ICMP echo respond) to the linux box (the NFS server)... Letting the ping run all the time NFS works so stable I even can do lots of compilations over it without any problems. So I don't have any answer WHY this helps, but it does... Perhaps it really is just a timing issue, I just don't know... If you can tell me what to measure and which values would be interesting I'll do these tests and send you the results... Thomas Schlichter -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: aart@kvack.org