Process remians in Running state causing other similar process to sleep and results to system hang


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Process remians in Running state causing other similar process to sleep and results to system hang

Hi Experts,

I am facing one problem here which is one process always stuck in running state which causes the other similar process to sleep state . This causes my system in hanged state.

On doing cat /proc/<pid>wchan showing the "__init_begin" in the output.

Can you please help me here why it is getting stuck in the __init_begin API. I am using linux kernel version 2.6.17.

Also i am not facing such probelm in kernel version 2.6.39

i have seen they have given one fix inside __init_begin in the kernel version 2.6.37 . Below is the fix

diff --git a/arch/um/kernel/uml.lds.S b/arch/um/kernel/uml.lds.S
index e7a6cca..664f942 100644
--- a/arch/um/kernel/uml.lds.S
+++ b/arch/um/kernel/uml.lds.S
@@ -22,7 +22,7 @@ SECTIONS
_text = .;
_stext = .;
__init_begin = .;
- INIT_TEXT_SECTION(PAGE_SIZE)
+ INIT_TEXT_SECTION(0)
. = ALIGN(PAGE_SIZE);

.text :

Now , how this fix related to my problem . please help me to overcome this problem
Looking forward for your suggestions and comments.
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sleep(3UCB)					     SunOS/BSD Compatibility Library Functions					       sleep(3UCB)

NAME
sleep - suspend execution for interval SYNOPSIS
/usr/ucb/cc [ flag ... ] file ... int sleep( seconds); unsigned seconds; DESCRIPTION
sleep() suspends the current process from execution for the number of seconds specified by the argument. The actual suspension time may be up to 1 second less than that requested, because scheduled wakeups occur at fixed 1-second intervals, and may be an arbitrary amount longer because of other activity in the system. sleep() is implemented by setting an interval timer and pausing until it expires. The previous state of this timer is saved and restored. If the sleep time exceeds the time to the expiration of the previous value of the timer, the process sleeps only until the timer would have expired, and the signal which occurs with the expiration of the timer is sent one second later. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |MT-Level |Async-Signal-Safe | +-----------------------------+-----------------------------+ SEE ALSO
alarm(2), getitimer(2), longjmp(3C), siglongjmp(3C), sleep(3C), usleep(3C), attributes(5) NOTES
Use of these interfaces should be restricted to only applications written on BSD platforms. Use of these interfaces with any of the system libraries or in multi-thread applications is unsupported. SIGALRM should not be blocked or ignored during a call to sleep(). Only a prior call to alarm(2) should generate SIGALRM for the calling process during a call to sleep(). A signal-catching function should not interrupt a call to sleep() to call siglongjmp(3C) or longjmp(3C) to restore an environment saved prior to the sleep() call. WARNINGS
sleep() is slightly incompatible with alarm(2). Programs that do not execute for at least one second of clock time between successive calls to sleep() indefinitely delay the alarm signal. Use sleep(3C). Each sleep(3C) call postpones the alarm signal that would have been sent during the requested sleep period to occur one second later. SunOS 5.10 12 Feb 1993 sleep(3UCB)

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