On 7/27/05, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > I sent the following posting to linux-kernel at kernel.org. One reply > suggested I send it to [EMAIL PROTECTED] (mailto:netdev@vger.kernel.org) , so > I am doing that. > > Below are some rather extensive logs showing the Linux 2.6.10 kernel > (kernel.org source) going into a tail spin after an "administration program" > on my > server tried to reset the mtu on all four of Ethernet Ports. I believe only > eth1 was changed -- from 9000 to 1500. But the admin program always resets > all > ports (even if the settings don't change). > > In about 1/2 a second, we generated this tremendous list of errors. Then > everything went back to normal (except that all of my users on all subnets > had > their Windows workstations freeze when it occurred) >
This is most likely due to the well known problem (we're working a fix) where the use of jumbo frames appears to cause extreme memory pressure due to looking for contiguous 32k pieces of memory for each descriptor. I don't know if this is indicative of some other problem in the memory manager not defragmenting often enough, but we're getting a lot of reports recently of problems like this with jumbos. We are working on a patch to change how the driver works in order to avoid this kind of scenario. Its not quite complete yet however. Jesse - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
