diff options
| author | Dmitry Vyukov <dvyukov@google.com> | 2021-03-23 07:49:23 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-03-23 17:22:50 -0700 |
| commit | 5aa3afe107d9099fc0dea2acf82c3e3c8f0f20e2 (patch) | |
| tree | 03a69b161a77f895e1c47c6c0f46eb617207181a /include/linux/netdevice.h | |
| parent | 4c94fe88cde4bb5c8e1baa01106c4e6db1c75738 (diff) | |
net: make unregister netdev warning timeout configurable
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 <dvyukov@google.com>
Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=211877
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 7005ad80e8d1..5fa66db0cb5d 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -4661,6 +4661,7 @@ void dev_get_tstats64(struct net_device *dev, struct rtnl_link_stats64 *s); extern int netdev_max_backlog; extern int netdev_tstamp_prequeue; +extern int netdev_unregister_timeout_secs; extern int weight_p; extern int dev_weight_rx_bias; extern int dev_weight_tx_bias; |