Hi I have just tested the newest RT Kernel. It gives me an oops: FEC Ethernet Driver kernel BUG at kernel/rtmutex.c:807! Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = c0004000 [00000000] *pgd=00000000 Internal error: Oops: 805 [#1] PREEMPT Modules linked in: CPU: 0 Not tainted (2.6.31.12-rt20-00001-g36e2ecd #1) PC is at __bug+0x1c/0x28 LR is at __bug+0x18/0x28 pc : [<c00231d0>] lr : [<c00231cc>] psr: 00000093 sp : c784bef0 ip : c784be30 fp : 00000002 r10: c79cfc24 r9 : c02e2074 r8 : c030e7f4 r7 : 40000013 r6 : c0188624 r5 : c784a000 r4 : 600e0000 r3 : 00000000 r2 : 00000001 r1 : c784a000 r0 : 0000002a Flags: nzcv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel Control: 00c5387d Table: 80004008 DAC: 00000017 Process irq/57-fec (pid: 115, stack limit = 0xc784a268) Stack: (0xc784bef0 to 0xc784c000) bee0: c022ef38 c022f134 00000000 40000013 bf00: ffffffff c784bf10 c022f0d4 c0030704 c0031a3c c00317f4 c78c2840 c02de460 bf20: 00000073 00000001 00000000 c784bf38 c005b4fc 600e0000 c79cf800 c0188624 bf40: c79cfc24 c030e7f4 c02e2074 c030e7f8 00000002 c01887ac c030e704 c79cfb20 bf60: c79cf800 c79cfc24 c030e7f4 c0189144 c02e2030 c02e206c c790a760 c784a000 bf80: c02e2030 c790a788 c02e208c c0061110 00000000 00000032 c784bfbc c781de4c bfa0: c790a760 c0060fdc 00000000 00000000 00000000 00000000 00000000 c004ad68 bfc0: 00000000 00000000 c784bfc8 c784bfc8 c784bfd0 c784bfd0 00000000 00000000 bfe0: c784bfe0 c784bfe0 00000000 00000000 00000000 c00208b4 cfee7cd4 8fcd69f9 [<c00231d0>] (__bug+0x1c/0x28) from [<c022f134>] (rt_spin_lock_slowlock+0x220/0x234) [<c022f134>] (rt_spin_lock_slowlock+0x220/0x234) from [<c01887ac>] (mii_queue+0x20/0xb4) [<c01887ac>] (mii_queue+0x20/0xb4) from [<c0189144>] (fec_enet_interrupt+0x84/0x104) [<c0189144>] (fec_enet_interrupt+0x84/0x104) from [<c0061110>] (irq_thread+0x134/0x1c0) [<c0061110>] (irq_thread+0x134/0x1c0) from [<c004ad68>] (kthread+0x7c/0x84) [<c004ad68>] (kthread+0x7c/0x84) from [<c00208b4>] (kernel_thread_exit+0x0/0x8) Code: e1a01000 e59f000c eb08299b e3a03000 (e5833000) ---[ end trace 7ce2cf1764dda59d ]--- exiting task "irq/57-fec" (115) is an active IRQ thread (irq 57) note: irq/57-fec[115] exited with preempt_count 1 physmap platform flash device: 02000000 at a0000000 physmap-flash.0: Found 1 x16 devices at 0x0 in 16-bit bank ... and later than ------------[ cut here ]------------ WARNING: at net/sched/sch_generic.c:250 dev_watchdog+0x288/0x2a8() NETDEV WATCHDOG: eth0 (fec): transmit queue 0 timed out Modules linked in: [<c002492c>] (unwind_backtrace+0x0/0xe4) from [<c0035ea8>] (warn_slowpath_common+0x4c/0x80) [<c0035ea8>] (warn_slowpath_common+0x4c/0x80) from [<c0035f18>] (warn_slowpath_fmt+0x28/0x38) [<c0035f18>] (warn_slowpath_fmt+0x28/0x38) from [<c01c8e58>] (dev_watchdog+0x288/0x2a8) [<c01c8e58>] (dev_watchdog+0x288/0x2a8) from [<c0040350>] (run_timer_softirq+0x160/0x280) [<c0040350>] (run_timer_softirq+0x160/0x280) from [<c003b32c>] (ksoftirqd+0x11c/0x224) [<c003b32c>] (ksoftirqd+0x11c/0x224) from [<c004ad68>] (kthread+0x7c/0x84) [<c004ad68>] (kthread+0x7c/0x84) from [<c00208b4>] (kernel_thread_exit+0x0/0x8) ---[ end trace 7ce2cf1764dda59f ]--- it seems as if the FEC ethernet driver of the phycore pcm043 freescale imx35 is unhappy. If there is an easy way to test this i would give it a try. Best regards Tim -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
