I keep getting this BUG() when there's IPV6 traffic in in my lan on a panda board with these configs: -start from a vanilla omap config (make ARCH=arm omap2plus_defconfig) -enable IPV6 and PREEMPT_VOLUNTARY -turn off CONFIG_DEBUG_SPINLOCK CONFIG_DEBUG_MUTEXES CONFIG_DEBUG_LOCK_ALLOC CONFIG_PROVE_LOCKING CONFIG_LOCKDEP CONFIG_TRACE_IRQFLAGS (or apply this patch fragment: http://people.canonical.com/~ppisati/panda_ipv6/config_lock_off.patch) -enable some useful options (like EHCI for my usb disk, etcetc) -finish off the build make ARCH=arm olddefconfig make ARCH=arm zImage -boot the board, wait for some ipv6 traffic: IP6 fe80::213:20ff:fefb:6364.mdns > ff02::fb.mdns: 0 PTR (QM)? _mumble._tcp.local. (36) and enjoy: [Thu Feb 21 10:23:07 2013] BUG: scheduling while atomic: swapper/0/0/0x40000100 [Thu Feb 21 10:23:07 2013] Modules linked in: [Thu Feb 21 10:23:07 2013] [<c001b1c4>] (unwind_backtrace+0x0/0xf0) from [<c0503c5c>] (__schedule_bug+0x48/0x5c) [Thu Feb 21 10:23:07 2013] [<c0503c5c>] (__schedule_bug+0x48/0x5c) from [<c0508608>] (__schedule+0x700/0x740) [Thu Feb 21 10:23:07 2013] [<c0508608>] (__schedule+0x700/0x740) from [<c007007c>] (__cond_resched+0x24/0x34) [Thu Feb 21 10:23:07 2013] [<c007007c>] (__cond_resched+0x24/0x34) from [<c05086dc>] (_cond_resched+0x3c/0x44) [Thu Feb 21 10:23:07 2013] [<c05086dc>] (_cond_resched+0x3c/0x44) from [<c0021f6c>] (do_alignment+0x178/0x78c) [Thu Feb 21 10:23:07 2013] [<c0021f6c>] (do_alignment+0x178/0x78c) from [<c00083e0>] (do_DataAbort+0x34/0x98) [Thu Feb 21 10:23:07 2013] [<c00083e0>] (do_DataAbort+0x34/0x98) from [<c0509a60>] (__dabt_svc+0x40/0x60) [Thu Feb 21 10:23:07 2013] Exception stack(0xc0763d70 to 0xc0763db8) [Thu Feb 21 10:23:07 2013] 3d60: e97e805e e97e806e 2c000000 11000000 [Thu Feb 21 10:23:07 2013] 3d80: ea86bb00 0000002c 00000011 e97e807e c076d2a8 e97e805e e97e806e 0000002c [Thu Feb 21 10:23:07 2013] 3da0: 3d000000 c0763dbc c04b98fc c02a8490 00000113 ffffffff [Thu Feb 21 10:23:07 2013] [<c0509a60>] (__dabt_svc+0x40/0x60) from [<c02a8490>] (__csum_ipv6_magic+0x8/0xc8) here you can find a .config for a 3.8 kernel showing this problem: http://people.canonical.com/~ppisati/panda_ipv6/config and a precompiled zImage: http://people.canonical.com/~ppisati/panda_ipv6/zImage any idea how can i debug this? -- bye, p. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
