tst-aio fails irregularly

[Patrick Smith]

The tst-aio test in glibc 2.3.1 sometimes fails on my system.  Running 
the test 1000 times in quick succession, it passed 602 times and failed 
398 times.  The failure message is

        aio_fsync (aio_write): failed comparison

Some details on my system:

PowerMac G4
Linux kernel 2.4.19
gcc 3.2.1
binutils 2.13.90.0.14

Output from a failure:

aio_write test ok
aio_read test ok
lio_listio (write) test ok
/wup/work/glibc-2.3.1-a/build/rt/tst-aio: aio_fsync (aio_write): failed 
comparison
finished3
finished2
finished

Output from a pass:

        aio_write test ok
        aio_read test ok
        lio_listio (write) test ok
        aio_fsync (aio_write) test ok
        finished3
        aio_cancel (fd, cbp[9]) cannot be canceled
        aio_cancel (fd, cbp[8]) cannot be canceled
        aio_cancel (fd, cbp[7]) cannot be canceled
        aio_cancel (fd, cbp[6]) cannot be canceled
        aio_cancel (fd, cbp[5]) cannot be canceled
        aio_cancel (fd, cbp[4]) cannot be canceled
        aio_cancel (fd, cbp[3]) cannot be canceled
        aio_cancel (fd, cbp[2]) cannot be canceled
        aio_cancel (fd, cbp[1]) cannot be canceled
        aio_cancel (fd, cbp[0]) cannot be canceled
        finished2
        finished

(The "cannot be canceled" messages do not always appear.)
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