Hello List, I have been running a very stable Kamailio 1.4 install for over a year now with no downtime. From time to time I get a message from the OS telling me that task kamailio:xxxx blocked for more than 120 seconds and a dump into syslog. I recently setup Kamailio 3.01 and it's been running for around 3 weeks now. Purely testing at the moment, there is only 1 SIP registration and almost no activity most of the time. I was checking dmesg and: [269844.208011] INFO: task kamailio:28504 blocked for more than 120 seconds. [269844.208093] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [269844.208178] kamailio D f6d77bf8 0 28504 28484 [269844.208180] f771e140 00000082 00000002 f6d77bf8 f7091390 f771e2cc c4019020 00000000 [269844.208184] 00000000 011615c9 f7091398 00000282 00000000 00000000 00000000 ffffffff [269844.208188] f5cba384 f5cba38c f5cba388 f771e140 c02c91ec f6969d68 f5cba38c f771e140 [269844.208191] Call Trace: [269844.208203] [<c02c91ec>] __mutex_lock_slowpath+0x50/0x7b [269844.208208] [<c02c9082>] mutex_lock+0xa/0xb [269844.208210] [<c02b7d4d>] unix_dgram_recvmsg+0x3e/0x231 [269844.208214] [<c0161beb>] get_page_from_freelist+0xc1/0x3e9 [269844.208218] [<c0161045>] __rmqueue_smallest+0x83/0xe3 [269844.208221] [<c025f771>] sock_recvmsg+0xde/0xf9 [269844.208226] [<c01387b0>] autoremove_wake_function+0x0/0x2d [269844.208231] [<c01620e9>] __alloc_pages_internal+0xb5/0x34e [269844.208236] [<c0260595>] sys_recvfrom+0xb4/0x116 [269844.208239] [<c011af13>] do_page_fault+0x0/0x8f9 [269844.208242] [<c0108540>] do_notify_resume+0x5f8/0x649 [269844.208247] [<c011b3c5>] do_page_fault+0x4b2/0x8f9 [269844.208250] [<c0260a48>] sys_socketcall+0x135/0x19e [269844.208254] [<c0108853>] sysenter_past_esp+0x78/0xb1 [269844.208257] [<c02c0000>] xenfb_probe+0xd1/0x35b [269844.208261] ======================= [269844.208262] INFO: task kamailio:28506 blocked for more than 120 seconds. [269844.208314] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [269844.208395] kamailio D d0e00947 0 28506 28484 [269844.208397] f77f8e60 00000082 00000002 d0e00947 00004292 f77f8fec c4024020 00000001 [269844.208401] 00000000 00000001 00000002 00000000 f7091398 00000001 00000001 c01211f2 [269844.208404] f5cba384 f5cba38c f5cba388 f77f8e60 c02c91ec f5cba38c f60add68 f77f8e60 [269844.208408] Call Trace: [269844.208410] [<c01211f2>] __wake_up_sync+0x2a/0x3e [269844.208413] [<c02c91ec>] __mutex_lock_slowpath+0x50/0x7b [269844.208416] [<c02c9082>] mutex_lock+0xa/0xb [269844.208418] [<c02b7d4d>] unix_dgram_recvmsg+0x3e/0x231 [269844.208421] [<c0161beb>] get_page_from_freelist+0xc1/0x3e9 [269844.208424] [<c0161045>] __rmqueue_smallest+0x83/0xe3 [269844.208427] [<c025f771>] sock_recvmsg+0xde/0xf9 [269844.208431] [<c01387b0>] autoremove_wake_function+0x0/0x2d [269844.208435] [<c01620e9>] __alloc_pages_internal+0xb5/0x34e [269844.208440] [<c0260595>] sys_recvfrom+0xb4/0x116 [269844.208444] [<c0180d0d>] cp_new_stat64+0xfc/0x10e [269844.208449] [<c011b3c5>] do_page_fault+0x4b2/0x8f9 [269844.208452] [<c0260a48>] sys_socketcall+0x135/0x19e [269844.208456] [<c0108853>] sysenter_past_esp+0x78/0xb1 [269844.208459] [<c02c0000>] xenfb_probe+0xd1/0x35b [269844.208462] ======================= [274198.229285] INFO: task kamailio:28504 blocked for more than 120 seconds. [274198.229340] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [274198.229422] kamailio D f6d77bf8 0 28504 28484 [274198.229425] f771e140 00000082 00000002 f6d77bf8 f7091390 f771e2cc c4019020 00000000 [274198.229429] 00000000 011615c9 f7091398 00000282 00000000 00000000 00000000 ffffffff [274198.229432] f5cba384 f5cba38c f5cba388 f771e140 c02c91ec f6969d68 f5cba38c f771e140 [274198.229436] Call Trace: [274198.229447] [<c02c91ec>] __mutex_lock_slowpath+0x50/0x7b [274198.229453] [<c02c9082>] mutex_lock+0xa/0xb [274198.229455] [<c02b7d4d>] unix_dgram_recvmsg+0x3e/0x231 [274198.229459] [<c0161beb>] get_page_from_freelist+0xc1/0x3e9 [274198.229463] [<c0161045>] __rmqueue_smallest+0x83/0xe3 [274198.229466] [<c025f771>] sock_recvmsg+0xde/0xf9 [274198.229471] [<c01387b0>] autoremove_wake_function+0x0/0x2d [274198.229476] [<c01620e9>] __alloc_pages_internal+0xb5/0x34e [274198.229481] [<c0260595>] sys_recvfrom+0xb4/0x116 [274198.229484] [<c011af13>] do_page_fault+0x0/0x8f9 [274198.229487] [<c0108540>] do_notify_resume+0x5f8/0x649 [274198.229492] [<c011b3c5>] do_page_fault+0x4b2/0x8f9 [274198.229495] [<c0260a48>] sys_socketcall+0x135/0x19e [274198.229499] [<c0108853>] sysenter_past_esp+0x78/0xb1 [274198.229502] [<c02c0000>] xenfb_probe+0xd1/0x35b [274198.229506] ======================= [274198.229507] INFO: task kamailio:28506 blocked for more than 120 seconds. [274198.229559] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [274198.229641] kamailio D d0e00947 0 28506 28484 [274198.229643] f77f8e60 00000082 00000002 d0e00947 00004292 f77f8fec c4024020 00000001 [274198.229646] 00000000 00000001 00000002 00000000 f7091398 00000001 00000001 c01211f2 [274198.229650] f5cba384 f5cba38c f5cba388 f77f8e60 c02c91ec f5cba38c f60add68 f77f8e60 [274198.229653] Call Trace: [274198.229656] [<c01211f2>] __wake_up_sync+0x2a/0x3e [274198.229659] [<c02c91ec>] __mutex_lock_slowpath+0x50/0x7b [274198.229662] [<c02c9082>] mutex_lock+0xa/0xb [274198.229664] [<c02b7d4d>] unix_dgram_recvmsg+0x3e/0x231 [274198.229667] [<c0161beb>] get_page_from_freelist+0xc1/0x3e9 [274198.229670] [<c0161045>] __rmqueue_smallest+0x83/0xe3 [274198.229673] [<c025f771>] sock_recvmsg+0xde/0xf9 [274198.229677] [<c01387b0>] autoremove_wake_function+0x0/0x2d [274198.229681] [<c01620e9>] __alloc_pages_internal+0xb5/0x34e [274198.229686] [<c0260595>] sys_recvfrom+0xb4/0x116 [274198.229690] [<c0180d0d>] cp_new_stat64+0xfc/0x10e [274198.229696] [<c011b3c5>] do_page_fault+0x4b2/0x8f9 [274198.229699] [<c0260a48>] sys_socketcall+0x135/0x19e [274198.229703] [<c0108853>] sysenter_past_esp+0x78/0xb1 [274198.229706] [<c02c0000>] xenfb_probe+0xd1/0x35b There was no activity when this happened. ON the 1.4 box there could be about 10 sessions setup when it happens. kamctl ps: Process:: ID=14 PID=28504 Type=MI DATAGRAM Process:: ID=15 PID=28505 Type=MI DATAGRAM Process:: ID=16 PID=28506 Type=MI DATAGRAM Even on the old install this doesn't seem to cause any problem and same here on 3.01 but would like to try and solve it. Any idea? Regards, Stephen