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Date: Mon, 18 Jun 2012 09:38:56 +0200 From: Eric Dumazet <eric.dumazet@...il.com> To: Dmitry Kravkov <dmitry@...adcom.com> Cc: 'David Miller' <davem@...emloft.net>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "therbert@...gle.com" <therbert@...gle.com>, "evansr@...gle.com" <evansr@...gle.com>, Eilon Greenstein <eilong@...adcom.com>, Merav Sicron <meravs@...adcom.com>, Yaniv Rosner <yaniv.rosner@...adcom.com>, "willemb@...gle.com" <willemb@...gle.com>, "thruby@...gle.com" <thruby@...gle.com> Subject: RE: [PATCH] bnx2x: fix panic when TX ring is full On Sat, 2012-06-16 at 07:40 +0000, Dmitry Kravkov wrote: > Hi Eric and Tomas > > > From: netdev-owner@...r.kernel.org [mailto:netdev- > > owner@...r.kernel.org] On Behalf Of David Miller > > Sent: Saturday, June 16, 2012 1:31 AM > > To: eric.dumazet@...il.com > > Cc: netdev@...r.kernel.org; therbert@...gle.com; evansr@...gle.com; > > Eilon Greenstein; Merav Sicron; Yaniv Rosner; willemb@...gle.com; > > thruby@...gle.com > > Subject: Re: [PATCH] bnx2x: fix panic when TX ring is full > > > > From: Eric Dumazet <eric.dumazet@...il.com> > > Date: Wed, 13 Jun 2012 21:45:16 +0200 > > > > > From: Eric Dumazet <edumazet@...gle.com> > > > > > > There is a off by one error in the minimal number of BD in > > > bnx2x_start_xmit() and bnx2x_tx_int() before stopping/resuming tx > > queue. > > > > > > A full size GSO packet, with data included in skb->head really needs > > > (MAX_SKB_FRAGS + 4) BDs, because of bnx2x_tx_split() > > > > > > This error triggers if BQL is disabled and heavy TCP transmit traffic > > > occurs. > > > > > > bnx2x_tx_split() definitely can be called, remove a wrong comment. > > > > > > Reported-by: Tomas Hruby <thruby@...gle.com> > > > Signed-off-by: Eric Dumazet <edumazet@...gle.com> > > Theoretically a can't see how we can reach the case with 4 BDs required apart of frags, > Usually we need 2, when split invoked 3: > 1.Start > 2.Start(split) > 3.Parsing > + Frags > > Next pages descriptors and 2 extras for full indication are not counted as available. > > Practically I'm running the traffic for more then a day without hitting the panic. > > Can you describe the scenario you reproduced this in details? And which code has paniced? Thats pretty immediate. Disable bql on your NIC. Say you have 4 queues : for q in 0 1 2 3 do echo max >/sys/class/net/eth0/queues/tx-$q/byte_queue_limits/limit_min done Then start 40 netperf for i in `seq 1 40` do netperf -H 192.168.1.4 & done [ 811.369026] bnx2x: [bnx2x_attn_int_deasserted3:3647(eth0)]MC assert! [ 811.369030] bnx2x: [bnx2x_mc_assert:597(eth0)]XSTORM_ASSERT_LIST_INDEX 0x2 [ 811.369036] bnx2x: [bnx2x_mc_assert:614(eth0)]XSTORM_ASSERT_INDEX 0x0 = 0x00110000 0x00000042 0x06981000 0x0001003a [ 811.369052] bnx2x: [bnx2x_attn_int_deasserted3:3653(eth0)]driver assert [ 811.369054] bnx2x: [bnx2x_panic_dump:773(eth0)]begin crash dump ----------------- [ 811.369056] bnx2x: [bnx2x_panic_dump:780(eth0)]def_idx(0x327) def_att_idx(0x4) attn_state(0x1) spq_prod_idx(0x2f) next_stats_cnt(0x31c) [ 811.369058] bnx2x: [bnx2x_panic_dump:785(eth0)]DSB: attn bits(0x0) ack(0x1) id(0x0) idx(0x4) [ 811.369060] bnx2x: [bnx2x_panic_dump:786(eth0)] def (0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x32a 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0) igu_sb_id(0x0) igu_seg_id(0x1) pf_id(0x0) vnic_id(0x0) vf_id(0xff) vf_valid (0x0) state(0x1) [ 811.369073] bnx2x: [bnx2x_panic_dump:830(eth0)]fp0: rx_bd_prod(0xdfae) rx_bd_cons(0xfb0) rx_comp_prod(0xe86f) rx_comp_cons(0xd86f) *rx_cons_sb(0xd86f) [ 811.369076] bnx2x: [bnx2x_panic_dump:834(eth0)] rx_sge_prod(0x400) last_max_sge(0x2b) fp_hc_idx(0x6a2f) [ 811.369078] bnx2x: [bnx2x_panic_dump:846(eth0)]fp0: tx_pkt_prod(0xb184) tx_pkt_cons(0xb088) tx_bd_prod(0xa48) tx_bd_cons(0xf943) *tx_cons_sb(0xb088) [ 811.369080] bnx2x: [bnx2x_panic_dump:846(eth0)]fp0: tx_pkt_prod(0x0) tx_pkt_cons(0x0) tx_bd_prod(0x0) tx_bd_cons(0x0) *tx_cons_sb(0x0) [ 811.369082] bnx2x: [bnx2x_panic_dump:858(eth0)] run indexes (0x6a2f 0x0) [ 811.369084] bnx2x: [bnx2x_panic_dump:864(eth0)] indexes (0x0 0xd86f 0x0 0x0 0x0 0xb088 0x0 0x0)pf_id(0x0) vf_id(0xff) vf_valid(0x0) vnic_id(0x0) same_igu_sb_1b(0x1) state(0x1) [ 811.369103] SM[0] __flags (0x0) igu_sb_id (0x1) igu_seg_id(0x0) time_to_expire (0x2f68cf91) timer_value(0xff) [ 811.369104] SM[1] __flags (0x0) igu_sb_id (0x1) igu_seg_id(0x0) time_to_expire (0x2f68cfc0) timer_value(0xff) [ 811.369106] INDEX[0] flags (0x0) timeout (0x0) [ 811.369107] INDEX[1] flags (0x2) timeout (0x6) [ 811.369108] INDEX[2] flags (0x0) timeout (0x0) [ 811.369110] INDEX[3] flags (0x0) timeout (0x0) [ 811.369111] INDEX[4] flags (0x1) timeout (0x0) [ 811.369112] INDEX[5] flags (0x3) timeout (0xc) [ 811.369113] INDEX[6] flags (0x1) timeout (0x0) [ 811.369114] INDEX[7] flags (0x1) timeout (0x0) [ 811.369116] bnx2x: [bnx2x_panic_dump:830(eth0)]fp1: rx_bd_prod(0x11ee) rx_bd_cons(0x1f0) rx_comp_prod(0x1e54) rx_comp_cons(0xe54) *rx_cons_sb(0xe54) [ 811.369119] bnx2x: [bnx2x_panic_dump:834(eth0)] rx_sge_prod(0x400) last_max_sge(0x29) fp_hc_idx(0x969d) [ 811.369121] bnx2x: [bnx2x_panic_dump:846(eth0)]fp1: tx_pkt_prod(0xba3f) tx_pkt_cons(0xb92f) tx_bd_prod(0x1aee) tx_bd_cons(0xb18) *tx_cons_sb(0xb92f) [ 811.369123] bnx2x: [bnx2x_panic_dump:846(eth0)]fp1: tx_pkt_prod(0x0) tx_pkt_cons(0x0) tx_bd_prod(0x0) tx_bd_cons(0x0) *tx_cons_sb(0x0) [ 811.369125] bnx2x: [bnx2x_panic_dump:858(eth0)] run indexes (0x969d 0x0) [ 811.369128] bnx2x: [bnx2x_panic_dump:864(eth0)] indexes (0x0 0xe54 0x0 0x0 0x0 0xb92f 0x0 0x0)pf_id(0x0) vf_id(0xff) vf_valid(0x0) vnic_id(0x0) same_igu_sb_1b(0x1) state(0x1) [ 811.369146] SM[0] __flags (0x0) igu_sb_id (0x2) igu_seg_id(0x0) time_to_expire (0x2f68cf8a) timer_value(0xff) [ 811.369148] SM[1] __flags (0x1) igu_sb_id (0x2) igu_seg_id(0x0) time_to_expire (0x2f68cfc4) timer_value(0xc) [ 811.369150] INDEX[0] flags (0x0) timeout (0x0) [ 811.369151] INDEX[1] flags (0x2) timeout (0x6) [ 811.369152] INDEX[2] flags (0x0) timeout (0x0) [ 811.369153] INDEX[3] flags (0x0) timeout (0x0) [ 811.369154] INDEX[4] flags (0x1) timeout (0x0) [ 811.369156] INDEX[5] flags (0x3) timeout (0xc) [ 811.369157] INDEX[6] flags (0x1) timeout (0x0) [ 811.369158] INDEX[7] flags (0x1) timeout (0x0) [ 811.369160] bnx2x: [bnx2x_panic_dump:830(eth0)]fp2: rx_bd_prod(0xa84f) rx_bd_cons(0x851) rx_comp_prod(0xb367) rx_comp_cons(0xa367) *rx_cons_sb(0xa367) [ 811.369162] bnx2x: [bnx2x_panic_dump:834(eth0)] rx_sge_prod(0x400) last_max_sge(0x1f) fp_hc_idx(0x2bf7) [ 811.369164] bnx2x: [bnx2x_panic_dump:846(eth0)]fp2: tx_pkt_prod(0xb38d) tx_pkt_cons(0xb296) tx_bd_prod(0x1947) tx_bd_cons(0xb59) *tx_cons_sb(0xb296) [ 811.369166] bnx2x: [bnx2x_panic_dump:846(eth0)]fp2: tx_pkt_prod(0x0) tx_pkt_cons(0x0) tx_bd_prod(0x0) tx_bd_cons(0x0) *tx_cons_sb(0x0) [ 811.369168] bnx2x: [bnx2x_panic_dump:858(eth0)] run indexes (0x2bf7 0x0) [ 811.369170] bnx2x: [bnx2x_panic_dump:864(eth0)] indexes (0x0 0xa367 0x0 0x0 0x0 0xb296 0x0 0x0)pf_id(0x0) vf_id(0xff) vf_valid(0x0) vnic_id(0x0) same_igu_sb_1b(0x1) state(0x1) [ 811.369189] SM[0] __flags (0x1) igu_sb_id (0x3) igu_seg_id(0x0) time_to_expire (0x2f68cfc7) timer_value(0x6) [ 811.369191] SM[1] __flags (0x0) igu_sb_id (0x3) igu_seg_id(0x0) time_to_expire (0x2f68cf9d) timer_value(0xff) [ 811.369192] INDEX[0] flags (0x0) timeout (0x0) [ 811.369193] INDEX[1] flags (0x2) timeout (0x6) [ 811.369194] INDEX[2] flags (0x0) timeout (0x0) [ 811.369196] INDEX[3] flags (0x0) timeout (0x0) [ 811.369197] INDEX[4] flags (0x1) timeout (0x0) [ 811.369198] INDEX[5] flags (0x3) timeout (0xc) [ 811.369199] INDEX[6] flags (0x1) timeout (0x0) [ 811.369200] INDEX[7] flags (0x1) timeout (0x0) [ 811.369202] bnx2x: [bnx2x_panic_dump:830(eth0)]fp3: rx_bd_prod(0x7df1) rx_bd_cons(0xdf3) rx_comp_prod(0x8887) rx_comp_cons(0x7887) *rx_cons_sb(0x7887) [ 811.369204] bnx2x: [bnx2x_panic_dump:834(eth0)] rx_sge_prod(0x400) last_max_sge(0x1a) fp_hc_idx(0x5cb) [ 811.369206] bnx2x: [bnx2x_panic_dump:846(eth0)]fp3: tx_pkt_prod(0xb8ce) tx_pkt_cons(0xb7cc) tx_bd_prod(0x15cf) tx_bd_cons(0x8c5) *tx_cons_sb(0xb7cc) [ 811.369208] bnx2x: [bnx2x_panic_dump:846(eth0)]fp3: tx_pkt_prod(0x0) tx_pkt_cons(0x0) tx_bd_prod(0x0) tx_bd_cons(0x0) *tx_cons_sb(0x0) [ 811.369210] bnx2x: [bnx2x_panic_dump:858(eth0)] run indexes (0x5cb 0x0) [ 811.369212] bnx2x: [bnx2x_panic_dump:864(eth0)] indexes (0x0 0x7887 0x0 0x0 0x0 0xb7cc 0x0 0x0)pf_id(0x0) vf_id(0xff) vf_valid(0x0) vnic_id(0x0) same_igu_sb_1b(0x1) state(0x1) [ 811.369231] SM[0] __flags (0x0) igu_sb_id (0x4) igu_seg_id(0x0) time_to_expire (0x2f68cf9e) timer_value(0xff) [ 811.369233] SM[1] __flags (0x1) igu_sb_id (0x4) igu_seg_id(0x0) time_to_expire (0x2f68cfe5) timer_value(0xc) [ 811.369235] INDEX[0] flags (0x0) timeout (0x0) [ 811.369236] INDEX[1] flags (0x2) timeout (0x6) [ 811.369237] INDEX[2] flags (0x0) timeout (0x0) [ 811.369238] INDEX[3] flags (0x0) timeout (0x0) [ 811.369239] INDEX[4] flags (0x1) timeout (0x0) [ 811.369240] INDEX[5] flags (0x3) timeout (0xc) [ 811.369241] INDEX[6] flags (0x1) timeout (0x0) [ 811.369242] INDEX[7] flags (0x1) timeout (0x0) [ 811.369246] bnx2x 0000:03:00.0: eth0: bc 6.2.8 [ 811.369250] begin fw dump (mark 0x3c65b0) [ 811.369257] ttn 0x0->0x10 [ 811.369257] attn 0x10->0x0 [ 811.369258] attn 0x0->0x10 [ 811.369265] attn 0x10->0x0 [ 811.369265] attn 0x0->0x10 [ 811.369272] attn 0x10->0x0 [ 811.369272] attn 0x0->0x10 [ 811.369279] attn 0x10->0x0 [ 811.369279] attn 0x0->0x10 [ 811.369286] attn 0x10->0x0 [ 811.369286] attn 0x0->0x10 [ 811.369293] attn 0x10->0x0 [ 811.369294] attn 0x0->0x10 [ 811.369301] attn 0x10->0x0 [ 811.369301] attn 0x0->0x10 [ 811.369308] attn 0x10->0x0 [ 811.369308] attn 0x0->0x10 [ 811.369309] attn 0x10->0x0 [ 811.369316] attn 0x0->0x10 [ 811.369316] attn 0x10->0x0 [ 811.369323] attn 0x0->0x10 [ 811.369324] attn 0x10->0x0 [ 811.369331] attn 0x0->0x10 [ 811.369331] attn 0x10->0x0 [ 811.369338] attn 0x0->0x10 [ 811.369338] attn 0x10->0x0 [ 811.369345] attn 0x0->0x10 [ 811.369345] attn 0x10->0x0 [ 811.369352] attn 0x0->0x10 [ 811.369352] attn 0x10->0x0 [ 811.369359] attn 0x0->0x10 [ 811.369360] attn 0x10->0x0 [ 811.369360] attn 0x0->0x10 [ 811.369367] attn 0x10->0x0 [ 811.369367] attn 0x0->0x10 [ 811.369374] attn 0x10->0x0 [ 811.369375] attn 0x0->0x10 [ 811.369382] attn 0x10->0x0 [ 811.369382] attn 0x0->0x10 [ 811.369389] attn 0x10->0x0 [ 811.369389] attn 0x0->0x10 [ 811.369396] attn 0x10->0x0 [ 811.369396] attn 0x0->0x10 [ 811.369403] attn 0x10->0x0 [ 811.369403] attn 0x0->0x10 [ 811.369410] attn 0x10->0x0 [ 811.369411] attn 0x0->0x10 [ 811.369417] attn 0x10->0x0 [ 811.369418] attn 0x0->0x10 [ 811.369418] attn 0x10->0x0 [ 811.369439] attn 0x0->0x10 [ 811.369439] attn 0x10->0x0 [ 811.369446] attn 0x0->0x10 [ 811.369446] attn 0x10->0x0 [ 811.369453] attn 0x0->0x10 [ 811.369454] attn 0x10->0x0 [ 811.369461] attn 0x0->0x10 [ 811.369461] attn 0x10->0x0 [ 811.369469] attn 0x0->0x10 [ 811.369469] attn 0x10->0x0 [ 811.369477] attn 0x0->0x10 [ 811.369477] attn 0x10->0x0 [ 811.369484] f0: UNLOAD_REQ_WOL_DIS 0x4 [ 811.369485] evnt[0.0] 0x1mcp intr[0.0]: 0x10:RSV ACCESS => 0x0 PC 0x800dd28 [ 811.369507] >0x0 [ 811.369507] attn 0x0->0x10 [ 811.369507] attn 0x10->0x0 [ 811.369515] f0: UNLOAD_DONE 0x5 [ 811.369515] mcp intr[0.0]: 0x10:RSV ACCESS => 0x0 PC 0x8015e88 [ 811.369530] lnk_cmn_int[0]: (rc 0) [ 811.369537] link_init[1.0]: 0x4 [ 811.369538] idx = 0, req_line_speed = 0x3e8, req_duplex=0x1 [ 811.369552] idx = 1, req_line_speed = 0x0, req_duplex=0x1 [ 811.369560] ML recurs lvl 1 [ 811.369568] init_phy[1.0]: done [ 811.369568] ML recurs lvl 1 [ 811.369576] link_init[0.0]: 0x4 [ 811.369576] idx = 0, req_line_speed = 0x3e8, req_duplex=0x1 [ 811.369590] idx = 1, req_line_speed = 0x0, req_duplex=0x1 [ 811.369598] ML recurs lvl 1 [ 811.369605] init_phy[0.0]: done [ 811.369606] f0: LOAD_REQ 0x6 [ 811.369613] 0.0:PMF->f0 [ 811.369614] f0: LOAD_DONE 0x7 [ 811.369621] evnt[0.0] 0x0->0x1000 [ 811.369629] evnt[0.0] 0x1000->0x0 [ 811.369629] f0: UNLOAD_REQ_WOL_DIS 0x8 [ 811.369637] f0: UNLOAD_DONE 0x9 [ 811.369644] lnk_cmn_int[0]: (rc 0) [ 811.369645] link_init[1.0]: 0x4 [ 811.369652] idx = 0, req_line_speed = 0x3e8, req_duplex=0x1 [ 811.369667] idx = 1, req_line_speed = 0x0, req_duplex=0x1 [ 811.369675] Ap.�AML recurs lvl 1 [ 811.369682] init_phy[1.0]: done [ 811.369690] ML recurs lvl 1 [ 811.369690] link_init[0.0]: 0x4 [ 811.369698] idx = 0, req_line_speed = 0x3e8, req_duplex=0x1 [ 811.369706] idx = 1, req_line_speed = 0x0, req_duplex=0x1 [ 811.369720] ML recurs lvl 1 [ 811.369720] init_phy[0.0]: done [ 811.369728] f0: LOAD_REQ 0xa [ 811.369728] 0.0:PMF->f0 [ 811.369735] f0: LOAD_DONE 0xb [ 811.369735] evnt[0.0] 0x0->0x1000 [ 811.369742] evnt[0.0] 0x1000->0x0 [ 811.369749] end of fw dump [ 811.369752] bnx2x: [bnx2x_mc_assert:597(eth0)]XSTORM_ASSERT_LIST_INDEX 0x2 [ 811.369758] bnx2x: [bnx2x_mc_assert:614(eth0)]XSTORM_ASSERT_INDEX 0x0 = 0x00110000 0x00000042 0x06981000 0x0001003a [ 811.369776] bnx2x: [bnx2x_panic_dump:996(eth0)]end crash dump ----------------- [ 819.771607] ------------[ cut here ]------------ [ 819.771618] WARNING: at net/sched/sch_generic.c:263 dev_watchdog +0x267/0x270() [ 819.771622] Hardware name: TBG,ICH10 [ 819.771625] NETDEV WATCHDOG: eth0 (bnx2x): transmit queue 1 timed out [ 819.771627] Modules linked in: act_mirred cls_u32 cls_tcindex sch_dsmark xt_multiport iptable_mangle ip_tables x_tables pca954x i2c_mux processor cdc_acm uhci_hcd ehci_hcd i2c_dev i2c_i801 i2c_core i2c_debug msr cpuid bnx2x crc32c libcrc32c mdio ipv6 genrtc [ 819.771661] Pid: 0, comm: swapper/6 Tainted: G W 3.3.6-dbg-DEV #5 [ 819.771664] Call Trace: [ 819.771666] <IRQ> [<ffffffff8107fc0f>] warn_slowpath_common +0x7f/0xc0 [ 819.771679] [<ffffffff8107fd06>] warn_slowpath_fmt+0x46/0x50 [ 819.771685] [<ffffffff814cd327>] dev_watchdog+0x267/0x270 [ 819.771692] [<ffffffff81090343>] run_timer_softirq+0x183/0x440 [ 819.771696] [<ffffffff810902b4>] ? run_timer_softirq+0xf4/0x440 [ 819.771701] [<ffffffff814cd0c0>] ? pfifo_fast_init+0x90/0x90 [ 819.771707] [<ffffffff810875ad>] __do_softirq+0xbd/0x250 [ 819.771714] [<ffffffff810ca054>] ? tick_program_event+0x24/0x30 [ 819.771724] [<ffffffff8156169c>] call_softirq+0x1c/0x30 [ 819.771730] [<ffffffff8104f21d>] do_softirq+0x8d/0xc0 [ 819.771732] [<ffffffff810879de>] irq_exit+0x9e/0xc0 [ 819.771735] [<ffffffff81003dee>] smp_apic_timer_interrupt+0x6e/0x99 [ 819.771738] [<ffffffff81560cb0>] apic_timer_interrupt+0x70/0x80 [ 819.771739] <EOI> [<ffffffffa011503c>] ? acpi_idle_enter_bm +0x220/0x260 [processor] [ 819.771746] [<ffffffffa0115037>] ? acpi_idle_enter_bm+0x21b/0x260 [processor] [ 819.771751] [<ffffffff8146c2cd>] cpuidle_idle_call+0xcd/0x2a0 [ 819.771755] [<ffffffff8155be60>] ? notifier_call_chain+0x70/0x70 [ 819.771758] [<ffffffff8104c1d5>] cpu_idle+0x85/0xe0 [ 819.771763] [<ffffffff8154b726>] start_secondary+0x1e3/0x1ea [ 819.771764] ---[ end trace e93713a9d40cd06f ]--- [ 820.851700] bnx2x: [bnx2x_clean_tx_queue:1381(eth0)]timeout waiting for queue[0]: txdata->tx_pkt_prod(45546) != txdata->tx_pkt_cons(45192) [ 821.926357] bnx2x: [bnx2x_clean_tx_queue:1381(eth0)]timeout waiting for queue[1]: txdata->tx_pkt_prod(47679) != txdata->tx_pkt_cons(47407) [ 823.000384] bnx2x: [bnx2x_clean_tx_queue:1381(eth0)]timeout waiting for queue[2]: txdata->tx_pkt_prod(46070) != txdata->tx_pkt_cons(45718) [ 824.082211] bnx2x: [bnx2x_clean_tx_queue:1381(eth0)]timeout waiting for queue[3]: txdata->tx_pkt_prod(47370) != txdata->tx_pkt_cons(47052) [ 824.084515] bnx2x: [bnx2x_del_all_macs:7179(eth0)]Failed to delete MACs: -5 [ 824.084520] bnx2x: [bnx2x_chip_cleanup:7952(eth0)]Failed to schedule DEL commands for UC MACs list: -5 [ 824.097445] bnx2x: [bnx2x_func_stop:7758(eth0)]FUNC_STOP ramrod failed. Running a dry transaction [ 824.960780] bnx2x 0000:03:00.0: eth0: using MSI-X IRQs: sp 41 fp[0] 42 ... fp[3] 45 [ 824.967241] bnx2x: [bnx2x_nic_load:1857(eth0)]Function start failed! -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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