> /proc/cpuinfo exists on both RHEL5 and SLES10 machines I have at
> hand.  Does it exist on your machine?  If you run "cat /proc/cpuinfo >
> /tmp/t; ls -l /tmp/t" what size do you see?  What kind of machine are
> you running on (number of CPUs, etc)?
/proc/cpuinfo exists on every linux kernel I have seen in a long time,
it should be present in all current distros.

The size is 24790 bytes for a 32 core machine. The issue also appears on
the 16 core machine. However, I think this message first turned up when
we got the 4-core CPUs. So it might be related to the file size (before
both machines were 8 core total).

Look at the strace dump I sent in my first mail. It shows the system
calls leading up to the error message. It sucessfully opens the file,
allocates a 4kb thread-private memory block, and begins a read-loop on
the file descriptor with a 10k buffer (stack I guess). The kernel
returns only 5 stanzas worth of file content, probably because it's own
buffer is page-sized.  Interestingly, the second time round the buffer
size announced to read is decremented by 4k instead of just 3870. After
the buffer is (apparently) full, a last read is issued with only 1k. The
4k allocated before are freed and the error message is written to the log.

I can attach a debugger, but I'm lacking
.../src/server/auth/utauthd/GroupManager.c to find out more. ltrace
seems not to work with java, which is when I quit debugging and instead
wrote a mail here. :)

The machines are running Ubuntu Hardy i386 with a 2.6.23.11 amd64
kernel. Budget considerations forced us to use the Tyan 8 way box
instead of the much nicer x4600 -- although considering our hardware
troubles it might well have been worth it

I won't put users on the second machine for a couple of days, anyway, so
if you have any more tests that might help pinpointing the problem, tell me.

Elmar

Elmar
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