We have consistently encountered hard system locks with all enterprise 2.4.18 and 2.4.19 kernels while transferring relatively large amount of data (images) either via ftp or NFS.
We did NOT encounter any problems with the 2.4.8 enterprise kernel from ML 8.1, so we have been using that kernel with ML 8.2, until somebody finds a fix. We did not have any problem with the ordinary 2.4.18 or 2.4.19 kernels, so the problem is only found in the enterprise kernel. As an experiment I compiled one of the 2.4.18 enterprise kernels without the HIGHMEM option (the only change made). This kernel did not have the lock-ups, so I concluded that the problem had something to do with the HIGHMEM code. It is actually strange to me that this problem has been so little commented, considering the low prices on RAM. Does anybody know if this problem has been or will be fixed in 2.4.20 ? Bjarne Thomsen Department of Physics and Astronomy University of Aarhus On Wed, 2002-09-18 at 20:22, Bryan Whitehead wrote: > Testing one of our 2GB Dual-Pentium III (1ghz) machines we get a hard > lock with kernel enterprise. > kernel-enterprise-2.4.19.9mdk-1-1mdk.i586.rpm > > The lock up seems to be related to the scsi driver. aic7xxx. The last > message that is echoed to the syslog consol is: > kernel: (scsi0:A:0:0): Locking max tag count at 64 > > after that the machine is dead. No ping, but keyboard works enough for > Alt-SysRq stuff. Only problem is Alt-SysRq keys won't work. :( syncing > the disk results in the machine "trying" (It starts to sync the disk) > but will never finish, there is no HD activity. Then the keyboard will > not respond anymore. > > Trying to get a process list, or memory stats will finish off the lock > also. (as in it will become so useless that reset button is only thing > working). > > If my first sysrq key is to reboot it will. > > I ran memtest yesterday and all memory is ok. Mandrake 8.1 has no > problems on this machine. > > Heavy disk activity triggers the lock, like installing an RPM. :) > > It will always hard lock when installing the "FlashPlayer-5.0-8mdk" RPM. > > any suggestions? or specific sysrq keys you'd like me to try in locked > up state? (there is no oops or anything like that on the consol window) > > > -- > Bryan Whitehead > SysAdmin - JPL - Interferometry Systems and Technology > Phone: 818 354 2903 > [EMAIL PROTECTED] > >
