[coLinux-devel] Time freezes (was RE: Applications hanging in nanosleep)

[Nir P. <ni...@em...>]

Hello,

I too saw nanosleep() hangs - trying to run "top" (according to "strace" and
"gdb", the kernel function call never returns).

/bin/sleep hangs too.
/usr/bin/date keeps reporting the SAME frozen time...

Guess the time just froze...

It doesn't always freeze. Usually, everything work just fine. However,
sometimes, some event causes the time to stop running (I think), and from
that moment on - nothing time related works. Note that the scheduler keeps
scheduling, and the kernel works fine - all but the time.

I guess next stop is to debug the kernel...

Nir


-----Original Message-----
From: Jason A. Pattie [mailto:pat...@pc...] 
Sent: Saturday, February 21, 2004 06:25
To: John Milton
Cc: coLinux-devel
Subject: Re: [coLinux-devel] Applications hanging in nanosleep


John Milton wrote:

>I did an strace of dselect and dselect just stopped in a
>one second call to nanosleep, which was easy to break out of.
>  
>

I noticed this happened when attempting to upgrade libc6.  It did made a 
call to 'init u' and then a 'sleep 1', and just hung there.  So I ended 
up mangling the script to comment that line out, finish the "upgrade", 
and then rebooted with the newer version of libc6 and init.

>The same sort of thing happened in "/usr/bin/tset -s -m 'network:?xterm'"
>
>Perhaps there's some sort of race condition when sleeping for short
intervals. Maybe there should be some logic in there to just
>return if the requested interval happens to have already passed.
>
>I am running coLinux on W2K pro, on a PIII/600 laptop.
>  
>
Hmm.  Me too.  :)


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