netdev - Very slow remove interface from kernel

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <371A6638-8D92-4891-8DF5-C0EA4FBC1977@gmail.com>
Date: Tue, 9 May 2023 11:22:13 +0300
From: Martin Zaharinov <micron10@...il.com>
To: Eric Dumazet <edumazet@...gle.com>,
 netdev <netdev@...r.kernel.org>
Subject: Very slow remove interface from kernel

Hi Eric 

I think may be help for this :


I try this on kernel 6.3.1 

add vlans : 
for i in $(seq 2 4094); do ip link add link eth1 name vlan$i type vlan id $i; done
for i in $(seq 2 4094); do ip link set dev vlan$i up; done


and after that run : 

for i in $(seq 2 4094); do ip link del link eth1 name vlan$i type vlan id $i; done


time for remove for this 4093 vlans is 5-10 min .

Is there options to make fast this ?


Same problem is when have 5-6k ppp interface kernel very slow unregister device.


best regards,	
m.