Helo Stefan, I evaluated MPC8540ADS and found out similar problem few weeks ago. I made tiny patch and it works well. I also evaluated with NEC ehci pci device. The result was fine. I wrote 1GB data to external usb-2.0 HDD via USB-2.0(ehci), that works well. I also try to use ftp(MPC8540=server) and transfer (R/W) 2047MB data via TSEC(gianfar) and it also works well. If you try to use this patch, please let me know. I think patch requires more evaluation...
Best Regards, Y.Nishimura - Tokyo, Japan. Stefan Nickl wrote: >Hello, > >since the linuxppc-2.4 port to our custom 8540 board >has made some progress now, I went back to the ADS >board for some cross-checking. > >I've experienced several reproducible lockups that >are triggered by heavy IO and/or networking. > >Kernel is vanilla linuxppc-2.4.27-pre2, gcc 3.2.3, >root=/dev/nfs (Gentoo -Os -mcpu=603e) > >1) Using netcat to write data over tcp: > cat /dev/zero | nc lucy 3000 > > "lucy" is running "nc -l -p 3000 |pipeworks > /dev/null" > This freezes the ADS after a few seconds. > >2) Writing to the nfsroot server: > cat /dev/urandom > /test > > The same. Reading seems ok. > >3) Writing to a USB2.0 HDD connected via PCI > interface board (OHCI compatible). > > Lockup after ~70MB of writing > >I haven't tested explicitly, but the kernel that >was shipped with the board (some 2.4.20?) didn't >seem to have such problems. > >Any ideas? > >-- >Stefan Nickl >Kontron Modular Computers > > > ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
