netdev - Re: Urgent Bug report: PPPoE ioctl(PPPIOCCONNECT): Transport endpoint is not connected

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Message-Id: <C2588B79-4053-48E7-A053-408762AB01CA@gmail.com>
Date:   Wed, 15 Sep 2021 17:25:17 +0300
From:   Martin Zaharinov <micron10@...il.com>
To:     Florian Westphal <fw@...len.de>
Cc:     Guillaume Nault <gnault@...hat.com>,
        netdev <netdev@...r.kernel.org>
Subject: Re: Urgent  Bug report: PPPoE ioctl(PPPIOCCONNECT): Transport
 endpoint is not connected

Hey Florian

make test in lab and look much better that before.

see this perf 

 PerfTop:    6551 irqs/sec  kernel:77.8%  exact: 100.0% lost: 0/0 drop: 0/0 [4000Hz cycles],  (all, 12 CPUs)
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

    15.70%  [ixgbe]           [k] ixgbe_read_reg
    13.33%  [kernel]          [k] mutex_spin_on_owner
     7.65%  [kernel]          [k] osq_lock
     2.85%  libfrr.so.0.0.0   [.] 0x00000000000ce970
     1.94%  libfrr.so.0.0.0   [.] 0x00000000000ce94e
     1.19%  libc.so.6         [.] 0x0000000000186afa
     1.15%  [kernel]          [k] do_poll.constprop.0
     0.99%  [kernel]          [k] inet_dump_ifaddr
     0.94%  libteam.so.5.6.1  [.] 0x0000000000006470
     0.79%  libc.so.6         [.] 0x0000000000186e57
     0.71%  [ixgbe]           [k] ixgbe_update_mc_addr_list_generic
     0.65%  [kernel]          [k] __fget_files
     0.61%  [kernel]          [k] sock_poll
     0.57%  libteam.so.5.6.1  [.] 0x0000000000009e7d
     0.51%  perf              [.] 0x00000000000bc7b3
     0.51%  libteam.so.5.6.1  [.] 0x0000000000006501
     0.48%  [kernel]          [k] next_uptodate_page
     0.46%  [kernel]          [k] _raw_read_lock_bh
     0.43%  libc.so.6         [.] 0x0000000000186eac
     0.42%  bgpd              [.] 0x0000000000070a46
     0.41%  [pppoe]           [k] pppoe_flush_dev
     0.39%  [kernel]          [k] zap_pte_range


This happened when remove and add new interface on time of drop and reconnect users.


now : ip a command work fine !


Martin


> On 14 Sep 2021, at 14:00, Florian Westphal <fw@...len.de> wrote:
> 
> Martin Zaharinov <micron10@...il.com> wrote:
> 
> [ Trimming CC list ]
> 
>> Florian: 
>> 
>> If you make patch send to test please.
> 
> Attached.  No idea if it helps, but 'ip' should stay responsive
> even when masquerade processes netdevice events.
> <defer_masq_work.diff>