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Tue, 14 Sep 2021 03:53:21 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.120.0.1.13\)) Subject: Re: Urgent Bug report: PPPoE ioctl(PPPIOCCONNECT): Transport endpoint is not connected From: Martin Zaharinov In-Reply-To: <20210914095015.GA9076@breakpoint.cc> Date: Tue, 14 Sep 2021 13:53:20 +0300 Cc: Guillaume Nault , =?utf-8?Q?Pali_Roh=C3=A1r?= , Greg KH , netdev , Eric Dumazet Content-Transfer-Encoding: quoted-printable Message-Id: <504E1119-3631-4A2A-BD0C-F74AEE2BDBF5@gmail.com> References: <20210808152318.6nbbaj3bp6tpznel@pali> <8BDDA0B3-0BEE-4E80-9686-7F66CF58B069@gmail.com> <20210809151529.ymbq53f633253loz@pali> <20210811164835.GB15488@pc-32.home> <81FD1346-8CE6-4080-84C9-705E2E5E69C0@gmail.com> <6A3B4C11-EF48-4CE9-9EC7-5882E330D7EA@gmail.com> <20210914080206.GA20454@pc-4.home> <20210914095015.GA9076@breakpoint.cc> To: Florian Westphal X-Mailer: Apple Mail (2.3654.120.0.1.13) Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Florian Hi=20 One more=20 please see i try to remove nf_nat and xt_MASQUERADE=20 and on time of problem need 50-80 sec to remove and overload system . see perf from this moment:=20 PerfTop: 1738 irqs/sec kernel:85.0% exact: 100.0% lost: 0/0 drop: = 0/0 [4000Hz cycles], (all, 12 CPUs) = --------------------------------------------------------------------------= --------------------------------------------------------------------------= ----------------------------------------------------------- 40.63% [nf_conntrack] [k] nf_ct_iterate_cleanup 21.23% [kernel] [k] __local_bh_enable_ip 10.93% [kernel] [k] __cond_resched 9.20% [kernel] [k] _raw_spin_lock 8.91% [kernel] [k] rcu_all_qs 5.83% [nf_conntrack] [k] nf_conntrack_lock 0.10% [kernel] [k] mutex_spin_on_owner 0.08% telegraf [.] 0x0000000000021bf0 0.06% [kernel] [k] osq_lock 0.06% [kernel] [k] kallsyms_expand_symbol.constprop.0 0.05% [kernel] [k] format_decode 0.04% [kernel] [k] rtnl_fill_ifinfo.constprop.0.isra.0 0.04% perf [.] 0x00000000000bc7b3 0.04% [kernel] [k] memcpy_erms 0.03% [kernel] [k] string 0.03% [kernel] [k] menu_select 0.03% [kernel] [k] nla_put 0.03% [kernel] [k] vsnprintf Martin > On 14 Sep 2021, at 12:50, Florian Westphal wrote: >=20 > Guillaume Nault wrote: >>> And on time of problem when try to write : ip a=20 >>> to list interface wait 15-20 sec i finaly have options to simulate = but users is angry when down internet. >>=20 >> Probably some contention on the rtnl lock. >=20 > Yes, I'll create a patch.