Andres Freund <andres@anarazel.de> writes:
> In the current version of the AIO patchset, the creation of those io_uring
> instances does happen as part of an shmem init callback, as the io uring
> creation also sets up queues visible in shmem.
Hmm.
> So the issue would actually be that we're currently doing set_max_safe_fds()
> too late, not too early :/
Well, we'd rather set_max_safe_fds happen after semaphore creation,
so that it doesn't have to be explicitly aware of whether semaphores
consume FDs. Could we have it be aware of how many FDs *will be*
needed for io_uring, but postpone creation of those until after we
jack up RLIMIT_NOFILE?
I guess the other way would be to have two rounds of RLIMIT_NOFILE
adjustment, before and after shmem creation. That seems ugly but
shouldn't be very time-consuming.
regards, tom lane
