Re: [PATCH] net: change netdev_unregister_timeout_secs min value to 1

On 3/25/21 3:38 PM, Dmitry Vyukov wrote:

On Thu, Mar 25, 2021 at 3:34 PM Eric Dumazet [off-list ref] wrote:

quoted

On 3/25/21 11:31 AM, Dmitry Vyukov wrote:

quoted

netdev_unregister_timeout_secs=0 can lead to printing the
"waiting for dev to become free" message every jiffy.
This is too frequent and unnecessary.
Set the min value to 1 second.

Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Suggested-by: Eric Dumazet <edumazet@google.com>
Fixes: 5aa3afe107d9 ("net: make unregister netdev warning timeout configurable")
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---

Please respin your patch, and fix the merge issue [1]

Is net-next rebuilt and rebased? Do I send v4 of the whole change?
I cannot base it on net-next now, because net-next already includes
most of it... so what should I use as base then?

quoted

For networking patches it is customary to tell if its for net or net-next tree.

[1]

diff --git a/net/core/dev.c b/net/core/dev.c
index 4bb6dcdbed8b856c03dc4af8b7fafe08984e803f..7bb00b8b86c6494c033cf57460f96ff3adebe081 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c

@@ -10431,7 +10431,7 @@ static void netdev_wait_allrefs(struct net_device *dev)

                refcnt = netdev_refcnt_read(dev);

-               if (refcnt &&
+               if (refcnt != 1 &&
                    time_after(jiffies, warning_time +
                               netdev_unregister_timeout_secs * HZ)) {
                        pr_emerg("unregister_netdevice: waiting for %s to become free. Usage count = %d\n",

Please include my fix into your patch.

Send a V2, based on current net-next.

net-next is never rebased, we have to fix the bug by adding a fix on top of it.