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Thu, 16 Sep 2021 13:00:35 -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: <20210914110038.GA25110@breakpoint.cc> Date: Thu, 16 Sep 2021 23:00:34 +0300 Cc: Guillaume Nault , netdev Content-Transfer-Encoding: quoted-printable Message-Id: <1DC90AD0-9235-4D18-B7A6-DFB586275549@gmail.com> References: <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> <1724F1B4-5048-4625-88A5-1193D4445D5A@gmail.com> <20210914110038.GA25110@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 Small Updates After switch from frr to bird bgp reduce load from frr but still when have disconnect 5k+ users have slow pppoe_flush_dev PerfTop: 15606 irqs/sec kernel:77.7% exact: 100.0% lost: 0/0 = drop: 0/0 [4000Hz cycles], (all, 12 CPUs) = --------------------------------------------------------------------------= --------------------------------------------------------------------------= ----------------------------------------------------------- 8.24% [kernel] [k] osq_lock 7.55% [kernel] [k] mutex_spin_on_owner 7.04% [pppoe] [k] pppoe_flush_dev 2.77% libteam.so.5.6.1 [.] 0x0000000000009e7d 2.67% libteam.so.5.6.1 [.] 0x0000000000006470 1.90% [kernel] [k] fib_table_flush 1.73% [kernel] [k] queued_read_lock_slowpath 1.68% [kernel] [k] next_uptodate_page 1.36% ip [.] 0x0000000000011b74 1.23% ip [.] 0x00000000000121b0 1.09% [kernel] [k] zap_pte_range 0.99% libteam.so.5.6.1 [.] 0x0000000000006501 0.88% dtvbras [.] 0x0000000000014be8 0.87% [kernel] [k] inet_dump_ifaddr 0.74% [kernel] [k] filemap_map_pages 0.72% [kernel] [k] neigh_flush_dev.isra.0 0.66% [kernel] [k] snmp_get_cpu_field 0.65% [kernel] [k] fib_table_insert 0.63% [kernel] [k] native_irq_return_iret 0.63% libteam.so.5.6.1 [.] 0x0000000000005c78 0.60% [kernel] [k] copy_page 0.52% libteam.so.5.6.1 [.] 0x000000000000647f 0.50% [kernel] [k] _raw_spin_lock 0.48% libc.so.6 [.] 0x00000000000965a2 0.45% [kernel] [k] _raw_read_lock_bh 0.44% [kernel] [k] release_pages 0.42% [kernel] [k] clear_page_erms 0.42% [kernel] [k] page_remove_rmap 0.41% [kernel] [k] queued_spin_lock_slowpath 0.38% [kernel] [k] kmem_cache_alloc 0.36% [kernel] [k] vma_interval_tree_insert 0.36% libteam.so.5.6.1 [.] 0x0000000000009e6f 0.36% [kernel] [k] do_set_pte sessions: starting: 296 active: 3868 finishing: 6748 > On 14 Sep 2021, at 14:00, Florian Westphal wrote: >=20 > Martin Zaharinov wrote: >=20 > [ Trimming CC list ] >=20 >> Florian:=20 >>=20 >> If you make patch send to test please. >=20 > Attached. No idea if it helps, but 'ip' should stay responsive > even when masquerade processes netdevice events. >