echo 0 > /proc/sys/kernel/hung_task_timeout_secs,ppp0 interface not up due to this.
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echo 0 > /proc/sys/kernel/hung_task_timeout_secs,ppp0 interface not up due to this.
Hi,
Am trying to run the ppp daemon on console port of my board which has p2020 processor with linux kernel 2.6.32.
After running ppp interface ppp0 not coming up and getting error pppd blocked for more than 120 sec.Am not able to debug this,please help me how to come out of this error.
syslog output given below.
INFO: task pppd:2957 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
pppd D 0fe61c98 0 2957 2953 0x00000002
Call Trace:
[eec93d10] [c021ace4] n_tty_set_termios+0x3f8/0x59c (unreliable)
[eec93dd0] [c0007920] __switch_to+0x54/0xb0
[eec93de0] [c0381e8c] schedule+0x1f0/0x2f8
[eec93e20] [c021f308] tty_ldisc_ref_wait+0x6c/0xb0
[eec93e60] [c0218888] tty_ioctl+0x13c/0x9dc
[eec93e90] [c00b0aa4] vfs_ioctl+0x34/0x8c
[eec93ea0] [c00b0cc8] do_vfs_ioctl+0x88/0x72c
[eec93f10] [c00b13ac] sys_ioctl+0x40/0x74
[eec93f40] [c000f998] ret_from_syscall+0x0/0x3c
INFO: task pppd:2957 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
pppd D 0fe61c98 0 2957 2953 0x00000002
I have source code,i went through code base i suspect tty_ldisc_ref_wait putting the ioctl request from pppd to wait queue and unable to wake it up,due to this it was hanging,let me know your views on this issue.
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echo 0 > /proc/sys/kernel/hung_task_timeout_secs,ppp0 interface not up due to this.
