linuxppc-dev-bounces+joakim.tjernlund=transmode...@lists.ozlabs.org wrote on 2010/11/08 16:05:30:
> From: Joakim Tjernlund <joakim.tjernl...@transmode.se> > To: linuxppc-...@ozlabs.org > Date: 2010/11/08 16:12 > Subject: INFO: task snmpd:398 blocked for more than 120 seconds. > Sent by: linuxppc-dev-bounces+joakim.tjernlund=transmode...@lists.ozlabs.org > > > I can't make out what is causing this hang every now an then: > > INFO: task snmpd:398 blocked for more than 120 seconds. > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > snmpd D 0fad1760 0 398 1 0x00000000 > Call Trace: > [c7b5fc70] [c7a49a80] 0xc7a49a80 (unreliable) > [c7b5fd30] [c0008608] __switch_to+0x4c/0x6c > [c7b5fd40] [c028fed4] schedule+0x184/0x310 > [c7b5fd70] [c0290e5c] __mutex_lock_slowpath+0xa4/0x150 > [c7b5fdb0] [c0290c50] mutex_lock+0x44/0x48 > [c7b5fdc0] [c01eb5b0] rtnl_lock+0x18/0x28 > [c7b5fdd0] [c01df6c4] dev_ioctl+0x2b4/0x764 > [c7b5fe60] [c01cafc8] sock_ioctl+0x18c/0x2a0 > [c7b5fe80] [c009a16c] vfs_ioctl+0xcc/0xe0 > [c7b5fea0] [c009a998] do_vfs_ioctl+0xc4/0x79c > [c7b5ff10] [c009b0b0] sys_ioctl+0x40/0x74 > [c7b5ff40] [c00117c4] ret_from_syscall+0x0/0x38 > > The dev_ioctl is in SIOCGIFCONF: > int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg) > { > struct ifreq ifr; > int ret; > char *colon; > > /* One special case: SIOCGIFCONF takes ifconf argument > and requires shared lock, because it sleeps writing > to user space. > */ > > if (cmd == SIOCGIFCONF) { > rtnl_lock(); > ret = dev_ifconf(net, (char __user *) arg); > rtnl_unlock(); > return ret; > } > > Any ideas? Kernel is 2.6.35 I tried PROVE_LOCKING but now my kernel doesn't boot at all :) Something goes very wrong in arch/powerpc/kernel/prom.c:694 694 memblock_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START); (gdb) print klimit $8 = 0xc08c9000 What is klimit and can I do something about it? kernel 2.6.35 on a mpc8321 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev