From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Ian McDonald" Date: Tue, 28 Feb 2006 21:35:05 +0000 Subject: Re: Resend: [PATCH] DCCP: Divide by zero fix Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: dccp@vger.kernel.org On 3/1/06, Arnaldo Carvalho de Melo wrote: > On 2/28/06, Ian McDonald wrote: > > Arnaldo, > > > > Haven't seen this going in so resending... > > What a coincidence, I'm testing this patch right now, and I'm afraid it has > some bug or makes it more likely that some other bug happens, the machine > soft locks with it enabled and when using CCID3 as the default RX CCID in > a TTCP test over loopback. > > Note that the problem happens more quickly if you test it on a machine with > less than 64 MB (where the problem happens, but after more time). > OK. I am doing some testing on lockups at present from CCID3 which I suspect are introduced recently.... they don't lock up on older code. Having said that I'm running without that patch applied so I will retest soon - but I don't believe it is the problem when I looked at the scope of that code. I have a suspicion that if I don't find anything with git-bisect for CCID3 lockups that it might be when you use CCID3 and set DCCP_INITIAL_SEND_ACK_VECTOR to 1.... Anyway another 3 or 4 reboots and I should give some more answers. BTW my problems occur when using a netem box in the middle as per setup described on DCCP testing on ODSL Wiki. Ian -- Ian McDonald Web: http://wand.net.nz/~iam4 Blog: http://imcdnzl.blogspot.com WAND Network Research Group Department of Computer Science University of Waikato New Zealand