citp_fdtable_ctor: failed to allocate fdtable

[ol-alexandra]

Debian testing/sid:

oo:ncat[1582]: citp_fdtable_ctor: failed to allocate fdtable (0x3ffffff8)
oo:ncat[1582]: FAIL at /home/sasha/work/level5/onload/src/lib/transport/unix/startup.c:685
oo:ncat[1582]: EtherFabric transport library: failed to initialise (9)
oo:ncat[1582]: hostname=elrond pid=1582
/home/sasha/work/level5/onload/build/gnu_x86_64_debt/lib/transport/unix/libcitransport0.so(+0x109f4d)[0x7f235a08df4d]
/home/sasha/work/level5/onload/build/gnu_x86_64_debt/lib/transport/unix/libcitransport0.so(+0xb4b1)[0x7f2359f8f4b1]
/lib64/ld-linux-x86-64.so.2(+0x4e35)[0x7f235a0f2e35]
/lib64/ld-linux-x86-64.so.2(+0x4f64)[0x7f235a0f2f64]
/lib64/ld-linux-x86-64.so.2(+0x1a840)[0x7f235a108840]
Aborted (core dumped)

The issue is, Onload uses RLIMIT_NOFILE:rlim_max value as fdtable size. With the recent changes in systemd the soft limit is the same as previously (1024, select-compatible) but hard limit is increased to 0x3ffffff8. System can't allocate that amount of memory for fdtable.

[okt-sergeyn]

I see this issue on Ubuntu 24.10.
According to my tests, if swapping is on, the issue does not happen.