| From: |
| Eric Dumazet <edumazet-AT-google.com> |
| To: |
| "David S . Miller" <davem-AT-davemloft.net>, Jakub Kicinski <kuba-AT-kernel.org>, Paolo Abeni <pabeni-AT-redhat.com> |
| Subject: |
| [PATCH net-next 0/4] net: reduce RTNL pressure in unregister_netdevice() |
| Date: |
| Tue, 07 Jan 2025 17:38:34 +0000 |
| Message-ID: |
| <20250107173838.1130187-1-edumazet@google.com> |
| Cc: |
| netdev-AT-vger.kernel.org, Simon Horman <horms-AT-kernel.org>, eric.dumazet-AT-gmail.com, Eric Dumazet <edumazet-AT-google.com> |
| Archive-link: |
| Article |
One major source of RTNL contention resides in unregister_netdevice()
Due to RCU protection of various network structures, and
unregister_netdevice() being a synchronous function,
it is calling potentially slow functions while holding RTNL.
I think we can release RTNL in two points, so that three
slow functions are called while RTNL can be used
by other threads.
Eric Dumazet (4):
net: no longer assume RTNL is held in flush_all_backlogs()
net: no longer hold RTNL while calling flush_all_backlogs()
net: expedite synchronize_net() for cleanup_net()
net: reduce RTNL hold duration in unregister_netdevice_many_notify()
include/net/net_namespace.h | 2 ++
net/core/dev.c | 61 +++++++++++++++++++++++++------------
net/core/net_namespace.c | 5 +++
3 files changed, 48 insertions(+), 20 deletions(-)
--
2.47.1.613.gc27f4b7a9f-goog
