On Fri, Jan 5, 2024 at 12:45 AM Stefan Hajnoczi <stefa...@gmail.com> wrote: > > On Thu, 4 Jan 2024 at 11:30, Daniel P. Berrangé <berra...@redhat.com> wrote: > > > > We've previously bumped up the timeouts in the netdev-socket qtest > > to supposedly fix non-deterministic failures, however, the failures > > are still hitting CI. > > > > A simple 'listen()' and 'connect()' pairing across 2 QEMU processes > > should be very quick to execute, even under high system load, so it > > was never likely that the test was failing due to timeouts being > > reached. > > > > The actual root cause was a race condition in the test design. It > > was spawning a QEMU with a 'server' netdev, and then spawning one > > with the 'client' netdev. There was insufficient synchronization, > > however, so it was possible for the 2nd QEMU process to attempt > > to 'connect()' before the 'listen()' call was made by the 1st QEMU. > > > > In the test scenarios that did not use the 'reconnect' flag, this > > would result in the client QEMU never getting into the expected > > state. The test code would thus loop on 'info network' until > > hitting the maximum wait time. > > > > This series reverts the increased timeouts, and fixes synchronization > > in the test scenarios. It also improves reporting of errors in the > > socket netdev backend so that 'info network' reports what actually > > went wrong rather than a useless generic 'connection error' string. > > This will help us diagnose any future CI problems, should they occurr. > > > > Daniel P. Berrangé (6): > > Revert "netdev: set timeout depending on loadavg" > > Revert "osdep: add getloadavg" > > Revert "tests/qtest/netdev-socket: Raise connection timeout to 120 > > seconds" > > net: add explicit info about connecting/listening state > > net: handle QIOTask completion to report useful error message > > qtest: ensure netdev-socket tests have non-overlapping names > > > > include/qemu/osdep.h | 10 --------- > > meson.build | 1 - > > net/stream.c | 18 +++++++++++----- > > tests/qtest/netdev-socket.c | 42 +++++++------------------------------ > > 4 files changed, 21 insertions(+), 50 deletions(-) > > Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com> >
Queued. Thanks
