Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1383817

linux-next: zillions of lockdep whinges in include/net/sock.h:1408

Show all headers | View raw

[Multipart message — attachments visible in raw view] - view raw

linux-next 20160420 is whining at an incredible rate - in 20 minutes of
uptime, I piled up some 41,000 hits from all over the place (cleaned up
to skip the CPU and PID so the list isn't quite so long):

% grep include/net/sock.h /var/log/messages | cut -f5- -d: |  sed -e 's/PID: [0-9]* /PID: (elided) /' -e 's/CPU: [0-3]/CPU: +/' | sort | uniq -c | sort -nr
  13468  CPU: + PID: (elided) at include/net/sock.h:1408 tcp_v6_rcv+0xc20/0xcb0
   9770  CPU: + PID: (elided) at include/net/sock.h:1408 udp_queue_rcv_skb+0x3ca/0x6d0
   7706  CPU: + PID: (elided) at include/net/sock.h:1408 sock_owned_by_user+0x91/0xa0
   2818  CPU: + PID: (elided) at include/net/sock.h:1408 udpv6_queue_rcv_skb+0x3b6/0x6d0
   1981  CPU: + PID: (elided) at include/net/sock.h:1408 tcp_write_timer+0xf2/0x110
   1954  CPU: + PID: (elided) at include/net/sock.h:1408 tcp_delack_timer+0x110/0x130
   1912  CPU: + PID: (elided) at include/net/sock.h:1408 tcp_keepalive_timer+0x136/0x2c0
    882  CPU: + PID: (elided) at include/net/sock.h:1408 tcp_close+0x226/0x4f0
    804  CPU: + PID: (elided) at include/net/sock.h:1408 tcp_tasklet_func+0x192/0x1e0
     28  CPU: + PID: (elided) at include/net/sock.h:1408 tcp_child_process+0x17a/0x350
      2  CPU: + PID: (elided) at include/net/sock.h:1408 tcp_v6_err+0x401/0x660
      2  CPU: + PID: (elided) at include/net/sock.h:1408 tcp_v6_err+0x1fd/0x660

Seems to be from this commit, which is apparently over-stringent or
isn't handling some case correctly:

commit fafc4e1ea1a4c1eb13a30c9426fb799f5efacbc3
Author: Hannes Frederic Sowa <hannes@stressinduktion.org>
Date:   Fri Apr 8 15:11:27 2016 +0200

    sock: tigthen lockdep checks for sock_owned_by_user

    sock_owned_by_user should not be used without socket lock held. It seems
    to be a common practice to check .owned before lock reclassification, so
    provide a little help to abstract this check away.

    Cc: linux-cifs@vger.kernel.org
    Cc: linux-bluetooth@vger.kernel.org
    Cc: linux-nfs@vger.kernel.org
    Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
    Signed-off-by: David S. Miller <davem@davemloft.net>

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

linux-next: zillions of lockdep whinges in include/net/sock.h:1408 Valdis Kletnieks <Valdis.Kletnieks@vt.edu> - 2016-04-21 02:40 +0200
  Re: linux-next: zillions of lockdep whinges in include/net/sock.h:1408 Hannes Frederic Sowa <hannes@stressinduktion.org> - 2016-04-21 09:50 +0200
    Re: linux-next: zillions of lockdep whinges in include/net/sock.h:1408 Valdis.Kletnieks@vt.edu - 2016-04-21 11:10 +0200
      Re: linux-next: zillions of lockdep whinges in  include/net/sock.h:1408 Eric Dumazet <eric.dumazet@gmail.com> - 2016-04-21 15:40 +0200
        Re: linux-next: zillions of lockdep whinges in  include/net/sock.h:1408 Hannes Frederic Sowa <hannes@stressinduktion.org> - 2016-04-21 16:00 +0200
          Re: linux-next: zillions of lockdep whinges in  include/net/sock.h:1408 David Miller <davem@davemloft.net> - 2016-04-24 20:40 +0200
            Re: linux-next: zillions of lockdep whinges in  include/net/sock.h:1408 Hannes Frederic Sowa <hannes@stressinduktion.org> - 2016-04-24 20:50 +0200
              Re: linux-next: zillions of lockdep whinges in  include/net/sock.h:1408 David Miller <davem@davemloft.net> - 2016-04-24 21:00 +0200
                Re: linux-next: zillions of lockdep whinges in  include/net/sock.h:1408 Eric Dumazet <eric.dumazet@gmail.com> - 2016-04-24 22:00 +0200
              Re: linux-next: zillions of lockdep whinges in  include/net/sock.h:1408 Eric Dumazet <eric.dumazet@gmail.com> - 2016-04-24 21:50 +0200
                Re: linux-next: zillions of lockdep whinges in include/net/sock.h:1408 Valdis.Kletnieks@vt.edu - 2016-04-24 22:00 +0200
                Re: linux-next: zillions of lockdep whinges in  include/net/sock.h:1408 Eric Dumazet <eric.dumazet@gmail.com> - 2016-04-24 23:10 +0200
                Re: linux-next: zillions of lockdep whinges in include/net/sock.h:1408 Valdis.Kletnieks@vt.edu - 2016-04-24 23:20 +0200
                Re: linux-next: zillions of lockdep whinges in  include/net/sock.h:1408 Eric Dumazet <eric.dumazet@gmail.com> - 2016-04-24 23:30 +0200
                Re: linux-next: zillions of lockdep whinges in  include/net/sock.h:1408 Eric Dumazet <eric.dumazet@gmail.com> - 2016-04-24 23:30 +0200
                Re: linux-next: zillions of lockdep whinges in include/net/sock.h:1408 Hannes Frederic Sowa <hannes@stressinduktion.org> - 2016-04-25 15:30 +0200
        Re: linux-next: zillions of lockdep whinges in  include/net/sock.h:1408 Hannes Frederic Sowa <hannes@stressinduktion.org> - 2016-04-21 20:20 +0200

csiph-web