AIO support on Linux on RedHat 7.3?

[Shaheed Haque]

Hi. I have been trying to use the glibc implementation of AIO with an
unpatched RedHat 7.3 (stock kernel, and the RPM is glibc-2.2.5-34) with
mixed results. On some machines, it works fine: on other apparently
identical hardware/firmware I get errors (ENOPERM in response to lio_listio,
FWIW).

On investigation, we learn that the glibc AIO is not supported on RedHat 7.3
(!!). I'm thinking of using pread/pwrite on files opened with O_NONBLOCK to
workaround this. Anyone have any better ideas?

Also, is there is a list of stuff which glibc ships header files for, but
for which we should not expect support?

Thanks, Shaheed

P.S. Please CC me as I'm not subscribed.