All of lore.kernel.org
 help / color / mirror / Atom feed
From: Eric Dumazet <edumazet@google.com>
To: Andrew Lunn <andrew@lunn.ch>
Cc: Eric Dumazet <eric.dumazet@gmail.com>,
	"David S . Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>, netdev <netdev@vger.kernel.org>,
	Dmitry Vyukov <dvyukov@google.com>
Subject: Re: [PATCH v3 net-next 00/23] net: add preliminary netdev refcount tracking
Date: Mon, 6 Dec 2021 15:44:57 -0800	[thread overview]
Message-ID: <CANn89iLPSianJ7TjzrpOw+a0PTgX_rpQmiNYbgxbn2K-PNouFg@mail.gmail.com> (raw)
In-Reply-To: <Ya6bj2nplJ57JPml@lunn.ch>

On Mon, Dec 6, 2021 at 3:24 PM Andrew Lunn <andrew@lunn.ch> wrote:
>
> On Sat, Dec 04, 2021 at 08:21:54PM -0800, Eric Dumazet wrote:
> > From: Eric Dumazet <edumazet@google.com>
> >
> > Two first patches add a generic infrastructure, that will be used
> > to get tracking of refcount increments/decrements.
>
> Hi Eric
>
> Using this i found:
>
> [  774.108901] unregister_netdevice: waiting for eth0 to become free. Usage count = 4
> [  774.110864] leaked reference.
> [  774.110874]  dst_alloc+0x7a/0x180
> [  774.110887]  ip6_dst_alloc+0x27/0x90
> [  774.110894]  ip6_pol_route+0x257/0x430
> [  774.110900]  ip6_pol_route_output+0x19/0x20
> [  774.110905]  fib6_rule_lookup+0x18b/0x270
> [  774.110914]  ip6_route_output_flags_noref+0xaa/0x110
> [  774.110918]  ip6_route_output_flags+0x32/0xa0
> [  774.110922]  ip6_dst_lookup_tail.constprop.0+0x181/0x240
> [  774.110929]  ip6_dst_lookup_flow+0x43/0xa0
> [  774.110934]  inet6_csk_route_socket+0x166/0x200
> [  774.110943]  inet6_csk_xmit+0x56/0x130
> [  774.110946]  __tcp_transmit_skb+0x53b/0xc30
> [  774.110953]  __tcp_send_ack.part.0+0xc6/0x1a0
> [  774.110958]  tcp_send_ack+0x1c/0x20
> [  774.110964]  __tcp_ack_snd_check+0x42/0x200
> [  774.110968]  tcp_rcv_established+0x27a/0x6f0
> [  774.110973] leaked reference.
> [  774.110975]  ipv6_add_dev+0x13e/0x4f0
> [  774.110982]  addrconf_notify+0x2ca/0x950
> [  774.110989]  raw_notifier_call_chain+0x49/0x60
> [  774.111000]  call_netdevice_notifiers_info+0x50/0x90
> [  774.111007]  __dev_change_net_namespace+0x30d/0x6c0
> [  774.111016]  do_setlink+0xdc/0x10b0
> [  774.111024]  __rtnl_newlink+0x608/0xa10
> [  774.111031]  rtnl_newlink+0x49/0x70
> [  774.111038]  rtnetlink_rcv_msg+0x14f/0x380
> [  774.111046]  netlink_rcv_skb+0x55/0x100
> [  774.111053]  rtnetlink_rcv+0x15/0x20
> [  774.111059]  netlink_unicast+0x230/0x340
> [  774.111064]  netlink_sendmsg+0x252/0x4b0
> [  774.111075]  sock_sendmsg+0x65/0x70
> [  774.111080]  ____sys_sendmsg+0x24e/0x290
> [  774.111084]  ___sys_sendmsg+0x81/0xc0
>
> I'm using GNS3 to simulate a network topology. So a collection of veth
> pairs, bridges and tap interfaces spread over a few namespaces. The
> network being simulated uses Segment Routing. And traceroute might also
> involved in this somehow. I have 3 patches applied, to make traceroute
> actually work when SRv6 is being used. You can find v3 here:
>
> https://lore.kernel.org/netdev/20211203162926.3680281-3-andrew@lunn.ch/T/
>
> I'm not sure if these patches are part of the problem or not. None of
> the traces i've seen are directly on the ICMP path. traceroute is
> using udp, and one of the traces above is for tcp, and the other looks
> like it is moving an interface into a different namespace?
>
> This is net-next from today.

I do not understand, net-next does not contain this stuff yet ?

I have other patches, this work is still in progress.

  reply	other threads:[~2021-12-06 23:45 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-05  4:21 [PATCH v3 net-next 00/23] net: add preliminary netdev refcount tracking Eric Dumazet
2021-12-05  4:21 ` [PATCH v3 net-next 01/23] lib: add reference counting tracking infrastructure Eric Dumazet
2021-12-08 14:09   ` Andrzej Hajda
2021-12-08 14:27     ` Dmitry Vyukov
2021-12-08 15:04       ` Andrzej Hajda
2021-12-08 14:59     ` Jakub Kicinski
2021-12-08 15:11       ` Andrzej Hajda
2021-12-15 10:18   ` Jiri Slaby
2021-12-15 10:38     ` Eric Dumazet
2021-12-15 10:41       ` Eric Dumazet
2021-12-15 10:57         ` Vlastimil Babka
2021-12-15 11:08           ` Eric Dumazet
2021-12-15 11:09             ` Jiri Slaby
2021-12-15 11:25               ` Eric Dumazet
2021-12-05  4:21 ` [PATCH v3 net-next 02/23] lib: add tests for reference tracker Eric Dumazet
2021-12-05  4:21 ` [PATCH v3 net-next 03/23] net: add net device refcount tracker infrastructure Eric Dumazet
2021-12-05  4:21 ` [PATCH v3 net-next 04/23] net: add net device refcount tracker to struct netdev_rx_queue Eric Dumazet
2021-12-05  4:21 ` [PATCH v3 net-next 05/23] net: add net device refcount tracker to struct netdev_queue Eric Dumazet
2021-12-05  4:22 ` [PATCH v3 net-next 06/23] net: add net device refcount tracker to ethtool_phys_id() Eric Dumazet
2021-12-05  4:22 ` [PATCH v3 net-next 07/23] net: add net device refcount tracker to dev_ifsioc() Eric Dumazet
2021-12-05  4:22 ` [PATCH v3 net-next 08/23] drop_monitor: add net device refcount tracker Eric Dumazet
2021-12-05  4:22 ` [PATCH v3 net-next 09/23] net: dst: add net device refcount tracking to dst_entry Eric Dumazet
2021-12-05  4:22 ` [PATCH v3 net-next 10/23] ipv6: add net device refcount tracker to rt6_probe_deferred() Eric Dumazet
2021-12-05  4:22 ` [PATCH v3 net-next 11/23] sit: add net device refcount tracking to ip_tunnel Eric Dumazet
2021-12-05  4:22 ` [PATCH v3 net-next 12/23] ipv6: add net device refcount tracker to struct ip6_tnl Eric Dumazet
2021-12-05  4:22 ` [PATCH v3 net-next 13/23] net: add net device refcount tracker to struct neighbour Eric Dumazet
2021-12-05  4:22 ` [PATCH v3 net-next 14/23] net: add net device refcount tracker to struct pneigh_entry Eric Dumazet
2021-12-05  4:22 ` [PATCH v3 net-next 15/23] net: add net device refcount tracker to struct neigh_parms Eric Dumazet
2021-12-05  4:22 ` [PATCH v3 net-next 16/23] net: add net device refcount tracker to struct netdev_adjacent Eric Dumazet
2021-12-05  4:22 ` [PATCH v3 net-next 17/23] ipv6: add net device refcount tracker to struct inet6_dev Eric Dumazet
2021-12-05  4:22 ` [PATCH v3 net-next 18/23] ipv4: add net device refcount tracker to struct in_device Eric Dumazet
2021-12-05  4:22 ` [PATCH v3 net-next 19/23] net/sched: add net device refcount tracker to struct Qdisc Eric Dumazet
2021-12-05  4:22 ` [PATCH v3 net-next 20/23] net: linkwatch: add net device refcount tracker Eric Dumazet
2021-12-05  4:22 ` [PATCH v3 net-next 21/23] net: failover: " Eric Dumazet
2021-12-05  4:22 ` [PATCH v3 net-next 22/23] ipmr, ip6mr: add net device refcount tracker to struct vif_device Eric Dumazet
2021-12-05  4:22 ` [PATCH v3 net-next 23/23] netpoll: add net device refcount tracker to struct netpoll Eric Dumazet
2021-12-06 23:23 ` [PATCH v3 net-next 00/23] net: add preliminary netdev refcount tracking Andrew Lunn
2021-12-06 23:44   ` Eric Dumazet [this message]
2021-12-06 23:48     ` Eric Dumazet
2021-12-07  0:00     ` Andrew Lunn
2021-12-07  0:04       ` Eric Dumazet
2021-12-07  0:12         ` Andrew Lunn
2021-12-07  0:17           ` Eric Dumazet
2021-12-07  0:21             ` Eric Dumazet
2021-12-07  0:27             ` Andrew Lunn
2021-12-07  0:53               ` Eric Dumazet
2021-12-07 19:52                 ` Andrew Lunn
2021-12-07 20:00                   ` Eric Dumazet
2021-12-08 17:29                     ` Andrew Lunn
2021-12-08 18:21                       ` Eric Dumazet
2021-12-08 18:53                         ` Eric Dumazet
2021-12-07  0:26 ` Jakub Kicinski

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=CANn89iLPSianJ7TjzrpOw+a0PTgX_rpQmiNYbgxbn2K-PNouFg@mail.gmail.com \
    --to=edumazet@google.com \
    --cc=andrew@lunn.ch \
    --cc=davem@davemloft.net \
    --cc=dvyukov@google.com \
    --cc=eric.dumazet@gmail.com \
    --cc=kuba@kernel.org \
    --cc=netdev@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.