From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Woodhouse Subject: Re: [PATCH net 2/2] 8139cp: reset BQL when ring tx ring cleared Date: Mon, 14 Sep 2015 13:05:08 +0100 Message-ID: <1442232308.30875.6.camel@infradead.org> References: <20130520095443.2d18b2cb@nehalam.linuxnetplumber.net> <20130520213728.GA28252@electric-eye.fr.zoreil.com> <20130520172749.2a4447b6@nehalam.linuxnetplumber.net> Mime-Version: 1.0 Content-Type: multipart/signed; micalg="sha-1"; protocol="application/x-pkcs7-signature"; boundary="=-reAhsq+KtoMNpNj1D3Tg" Cc: David Miller , netdev@vger.kernel.org To: Stephen Hemminger , Francois Romieu Return-path: Received: from casper.infradead.org ([85.118.1.10]:36277 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752483AbbINMFR (ORCPT ); Mon, 14 Sep 2015 08:05:17 -0400 In-Reply-To: <20130520172749.2a4447b6@nehalam.linuxnetplumber.net> Sender: netdev-owner@vger.kernel.org List-ID: --=-reAhsq+KtoMNpNj1D3Tg Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Mon, 2013-05-20 at 17:27 -0700, Stephen Hemminger wrote: > On Mon, 20 May 2013 23:37:28 +0200 > Francois Romieu wrote: >=20 > > cp_stop_hw includes netdev_reset_queue. > >=20 > > You have imho exhibited a start_xmit after cp_stop_hw race - not sure i= f > > it happens in cp_tx_timeout or cp_change_mtu. Reverting the analysis ab= ove, > > I have not found a place where cp_stop_hw could be called without being > > followed by a cp_clean_rings. The netdev_reset_queue in cp_stop_hw, now > > useless, should thus be removed. > >=20 > > Does it make sense ? >=20 > Your right, you could probably remove it. >=20 > It doesn't solve the problem, still seeing transmit timeouts. > Looks like what happens with DHCP is something else. Did you ever work this out? I'm seeing something similar on the inward -facing interface on my home router under high load =E2=80=94 and it doesn'= t automatically recover. [308309.340644] ------------[ cut here ]------------ [308309.345379] WARNING: at net/sched/sch_generic.c:255 dev_watchdog+0x103/= 0x190() [308309.352789] Hardware name: Geos [308309.356020] NETDEV WATCHDOG: eth1 (8139cp): transmit queue 0 timed out [308309.362733] Modules linked in: sch_fq_codel sch_teql gpio_keys_polled l= eds_gpio geodewdt solos_pci ledtrig_heartbeat gpio_cs5535 cs5535_clockevt 8= 139cp ip6t_REJECT ip6t_rt ip6t_hbh ip6t_mh ip6t_ipv6header ip6t_frag ip6t_e= ui64 ip6t_ah ip6table_raw ip6table_mangle ip6table_filter ip6_tables nf_con= ntrack_ipv6 nf_defrag_ipv6 nf_nat_irc nf_conntrack_irc nf_nat_ftp nf_conntr= ack_ftp xt_HL xt_hl xt_ecn ipt_ECN xt_CLASSIFY xt_time xt_tcpmss xt_statist= ic xt_mark xt_length xt_DSCP xt_dscp cs5535_mfgpt cs5535_mfd mfd_core ipt_M= ASQUERADE nf_nat xt_recent xt_helper xt_connmark xt_connbytes pptp l2tp_ppp= pppoe xt_conntrack xt_CT iptable_raw xt_state nf_conntrack_ipv4 nf_defrag_= ipv4 nf_conntrack pppox pppoatm ipt_REJECT xt_TCPMSS xt_comment xt_multipor= t xt_mac xt_limit iptable_mangle iptable_filter ip_tables xt_tcpudp x_table= s nsc_gpio ip_gre gre sit l2tp_netlink l2tp_core ppp_mppe tunnel4 tun ppp_a= sync ppp_generic slhc br2684 atm crc_ccitt ipv6 input_polldev msr input_cor= e sha1_generic geode_aes ecb arc4 aes_i586 ohci_hcd ehci_hcd usbcore usb_co= mmon [308309.457239] Pid: 0, comm: swapper Not tainted 3.7.1 #1 [308309.462463] Call Trace: [308309.465020] [] ? warn_slowpath_common+0x87/0xb0 [308309.470691] [] ? dev_watchdog+0x103/0x190 [308309.475755] [] ? warn_slowpath_fmt+0x33/0x40 [308309.481159] [] ? dev_watchdog+0x103/0x190 [308309.486244] [] ? pfifo_fast_dequeue+0xd0/0xd0 [308309.491751] [] ? call_timer_fn.isra.42+0x1c/0x80 [308309.497422] [] ? process_backlog+0x54/0xe0 [308309.502674] [] ? run_timer_softirq+0x12a/0x160 [308309.508169] [] ? pfifo_fast_dequeue+0xd0/0xd0 [308309.513697] [] ? __do_softirq+0x6d/0x110 [308309.518675] [] ? __tasklet_schedule+0x40/0x40 [308309.524178] [] ? irq_exit+0x31/0x60 [308309.529359] [] ? do_IRQ+0x8d/0xb0 [308309.533723] [] ? do_IRQ+0x8d/0xb0 [308309.538201] [] ? common_interrupt+0x29/0x2e [308309.543440] [] ? rt_mutex_adjust_prio_chain+0x180/0x280 [308309.549829] [] ? default_idle+0x14/0x30 [308309.554719] [] ? cpu_idle+0x2f/0x50 [308309.559259] [] ? start_kernel+0x286/0x28b [308309.564414] [] ? repair_env_string+0x4d/0x4d [308309.569729] ---[ end trace 2e18cc211cee6089 ]--- [308309.574551] 8139cp 0000:00:0b.0 eth1: Transmit timeout, status c 2b = 0 80ff --=20 dwmw2 --=-reAhsq+KtoMNpNj1D3Tg Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIISjjCCBicw ggUPoAMCAQICAw3vNzANBgkqhkiG9w0BAQUFADCBjDELMAkGA1UEBhMCSUwxFjAUBgNVBAoTDVN0 YXJ0Q29tIEx0ZC4xKzApBgNVBAsTIlNlY3VyZSBEaWdpdGFsIENlcnRpZmljYXRlIFNpZ25pbmcx 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