On Mon, Mar 22, 2021 at 8:26 PM David Miller <da...@davemloft.net> wrote: > > From: Dmitry Vyukov <dvyu...@google.com> > Date: Sat, 20 Mar 2021 15:28:51 +0100 > > > netdev_wait_allrefs() issues a warning if refcount does not drop to 0 > > after 10 seconds. While 10 second wait generally should not happen > > under normal workload in normal environment, it seems to fire falsely > > very often during fuzzing and/or in qemu emulation (~10x slower). > > At least it's not possible to understand if it's really a false > > positive or not. Automated testing generally bumps all timeouts > > to very high values to avoid flake failures. > > Make the timeout configurable for automated testing systems. > > Lowering the timeout may also be useful for e.g. manual bisection. > > The default value matches the current behavior. > > > > Signed-off-by: Dmitry Vyukov <dvyu...@google.com> > > Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=211877 > > Cc: net...@vger.kernel.org > > Cc: linux-kernel@vger.kernel.org > > I'd say a sysctl knob is much better than a compile time setting for this. > That way stock kernels can be used in these testing scenerios.
FTR, I've mailed v2 with a sysctl: https://lore.kernel.org/netdev/20210323064923.2098711-1-dvyu...@google.com/T/#u