The selftests: kvm: irqfd_test consistently fails across all test platforms
since its introduction in Linux next-20250625. The failure occurs due to
a KVM_IRQFD ioctl returning errno 11 (Resource temporarily unavailable).
This has been observed from day one and is reproducible on all test runs.
Reproducibility: 100% failure on all test platforms since
next-20250625..next-20250929
Test fails on the below list
* graviton4
* rk3399-rock-pi-4b
## Initial Observations:
The test is attempting to register an IRQFD but fails with EAGAIN (errno 11).
This likely indicates resource exhaustion or unsupported behavior on
affected ARM-based platforms.
Could you please advise on the way forward for this test?
Should we treat this as an unsupported case on ARM platforms,
or is there a missing implementation/configuration that needs to be addressed?
## Test log
selftests: kvm: irqfd_test
Random seed: 0x6b8b4567
==== Test Assertion Failure ====
include/kvm_util.h:527: !ret
pid=721 tid=721 errno=11 - Resource temporarily unavailable
1 0x000000000040250f: kvm_irqfd at kvm_util.h:527
2 0x000000000040222f: main at irqfd_test.c:100
3 0x0000ffffbd43229b: ?? ??:0
4 0x0000ffffbd43237b: ?? ??:0
addr2line: 5 0x000000000040206f: DWARF error: mangled line number
section (bad file number)
addr2line: DWARF error: mangled line number section (bad file number)
_start at ??:?
KVM_IRQFD failed, rc: -1 errno: 11 (Resource temporarily unavailable)
not ok 4 selftests: kvm: irqfd_test exit=254
## Links
*
https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250929/testrun/30048394/suite/kselftest-kvm/test/kvm_irqfd_test/log
*
https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250929/testrun/30048394/suite/kselftest-kvm/test/kvm_irqfd_test/details/
