I don't see the race the tx_free patch fixes. So I tried to generate a race by running 3-4 parallel ping floods from my Linux PC. Still no race/malfunction. So I removed the spin_lock_irq()/ spin_unlock_irq() in scc_enet_start_xmit(). Still no race/malfunction. I applied the tx_free patch. Got an oops after only a few seconds. Added the spin_lock_irq()/ spin_unlock_irq() again. Now it worked again.
It seems to me that the old tx_full stuff is working better that the new tx_free. Which race is it supposed to fix and how do I generate it? This is the changeset that introduces tx_free: http://ppc.bitkeeper.com:8080/linuxppc_2_4_devel/diffs/arch/ppc/8xx_io/enet.c at 1.12.1.8?nav=index.html|src/.|src/arch|src/arch/ppc|src/arch/ppc/8xx_io|hist/arch/ppc/8xx_io/enet.c Jocke ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
