Bug 138905

Description of problem:
Running our database server on 64bit linux distributions leads to a
rather nasty problem when Kernel Asynchronous I/O is enabled.  This
could mean that we run our 32bit product on 64bit distributions as
done for the AMD Opteron or XEON2 but it also reproduces easily when
running our 64bit product ported for the IBM Pseries PowerPC architecture.

Our database server queues per aio_read() and aio_write() operations
translated per /lib/tls/librtkaio.so to the Linux KAIO io_*() API.

Any so often when our database server is at a specific idle state or
when it is known that multiple Asynchronous I/O's are queued we poll
our queued aiocb's with aio_error() to obtain the specific call I/O
return values.  

Soon after queueing many I/O's into the o/s aio_error() returns -1
where errno indicates EINPROGRESS.  Our poll structure never escapes
from, ie the I/O's seem never to complete and EINPROGRESS is returned
for ever.

If you try to SIGKILL (kill -9) the process responsible you will
finally find that it turns Zombie locked in the kernel and unkillable.
Ie a system reboot is required to remove the process from the platform.

Version-Release number of selected component (if applicable):
Linux RHEL 3.0
Red Hat Enterprise Linux WS release 3 (Taroon Update 3)
Kernel 2.4.21-20.ELsmp on an x86_64
Linux aseamd2 2.4.21-20.ELsmp #1 SMP Wed Aug 18 20:34:58 EDT 2004
x86_64 x86_64 x86_64 GNU/Linux
rpm -qf /lib/tls/librtkaio-2.3.2.so
glibc-2.3.2-95.27

How reproducible:
Please contact Ghaf Toorani <gtoorani> to obtain a small
distribution for our product which includes a small reproduction
script.  This could be for Intel (AMD Opteron) or IBM Pseries (PowerPC)

Steps to Reproduce:
1. Install product 
2. Run shell script
3. kill -9 the aio_error() -> EINPROGRESS process
  
Actual results:
Kernel Asynchronous I/O under 64bit implementations does not work.

Expected results:


Additional info:
Please contact Ghaf Toorani <gtoorani> to obtain additional
results.