On Tue, Mar 23, 2021 at 07:49:23AM +0100, Dmitry Vyukov wrote: > 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. > Add net.core.netdev_unregister_timeout_secs sysctl to 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: netdev@vger.kernel.org > Cc: linux-ker...@vger.kernel.org > > --- > Changes since v1: > - use sysctl instead of a config > --- > Documentation/admin-guide/sysctl/net.rst | 11 +++++++++++ > include/linux/netdevice.h | 1 + > net/core/dev.c | 6 +++++- > net/core/sysctl_net_core.c | 10 ++++++++++ > 4 files changed, 27 insertions(+), 1 deletion(-) >
Thanks, Reviewed-by: Leon Romanovsky <leo...@nvidia.com>
