Bug 30818

 Hi,
 
 After a long discussion on #FreeBSD@irc.openprojects.net, i was
 redirected to your e-mail adress.
 
 My problem is that my box often freezes when i do big file transferts
 over the network, whether http or ftp is the same thing. I've asked
 people around me and found that i'm not alone with this problem.
 
 I'm sure the problem is not related to the hardware, as I experienced
 this weird thing on 4 different boxes, with different mother boards,
 ram, NIC, CPU...
 
 For example, the network adapters i tried on my personal box were an
 Intel Ether-Express pro 100, a DLink DFE 530TX and a 3COM 905B-TX. The
 problem was exactly the same in every case.
 
 Now, a better description of the problem :
 
 I start a big file transfert, and immediatly, my computer has a very poor
 ping : before i transfert the file, my average ping is about 0.5 ms (a
 normal LAN ping) then, it grows between 300 and 500 ms and up to 1.3 s.
 
 Then, the result is different, randomly :
 - only the transfert freezes, i do a ^C and i can see that i can't ping
   any machine on the LAN anymore whereas ifconfig returns me good things
   (interface up, with the same IP as before). And after a while, i can
   ping again.
 - the entire computer freezes and i've got no solution but to switch it
   off.
 - the transfert goes on but has some period where it's awfully slow (all
   the problems i experienced, me personally and the other persons around
   me, were with 100 Mbits adapters).
 
 In all the cases, I don't get anything in my logs.
 
 I was using a tuned kernel, and then i test with a generic one. On the 3
 other boxes which also experienced this problem, the kernel was a
 generic too.
 
 Thanks in advance and thanks for your great job on the project.
 
 Patrick Marmayou.