On 2015-11-04 06:28, Eric Dumazet wrote:
On Wed, 2015-11-04 at 06:12 +0200, Denys Fedoryshchenko wrote:
Just enabling gro or gso (or together) is fine there. Thanks for
advice.
Seems only tso causing problems.
Also i guess if i keep tso disabled, it will solve my MTU issues (i
had
once issue, that traffic heading to pppoe users,
who have 14xx mtu, was blocked, when offloading enabled on transit
server, but can't reproduce it quickly again).
Should i try to report to e1000e maintainers this bug? On similar
setup
it is happening only at specific locations,
but i am not definitely sure what can be the reason.
Not sure, have you tried per chance latest kernel (linux-4.3) for this
e1000e issue ?
Are you using vlan tags on this NIC ?
Tested now, can be reproduced on 4.3 as well.
What is interesting, if i enable tso alone, and leave gso/gro off - it
is working fine. gso+gro on, tso off - fine also.
But if i enable them all together - i trigger the bug.
[ 71.699687] e1000e 0000:00:19.0 eth0: Detected Hardware Unit Hang:
[ 71.699687] TDH <96>
[ 71.699687] TDT <9c>
[ 71.699687] next_to_use <9c>
[ 71.699687] next_to_clean <92>
[ 71.699687] buffer_info[next_to_clean]:
[ 71.699687] time_stamp <fffc78bd>
[ 71.699687] next_to_watch <96>
[ 71.699687] jiffies <fffc843c>
[ 71.699687] next_to_watch.status <0>
[ 71.699687] MAC Status <40080083>
[ 71.699687] PHY Status <796d>
[ 71.699687] PHY 1000BASE-T Status <3800>
[ 71.699687] PHY Extended Status <3000>
[ 71.699687] PCI Status <10>
[ 73.699241] e1000e 0000:00:19.0 eth0: Detected Hardware Unit Hang:
[ 73.699241] TDH <96>
[ 73.699241] TDT <9c>
[ 73.699241] next_to_use <9c>
[ 73.699241] next_to_clean <92>
[ 73.699241] buffer_info[next_to_clean]:
[ 73.699241] time_stamp <fffc78bd>
[ 73.699241] next_to_watch <96>
[ 73.699241] jiffies <fffc8c0c>
[ 73.699241] next_to_watch.status <0>
[ 73.699241] MAC Status <40080083>
[ 73.699241] PHY Status <796d>
[ 73.699241] PHY 1000BASE-T Status <3800>
[ 73.699241] PHY Extended Status <3000>
[ 73.699241] PCI Status <10>
[ 75.698775] e1000e 0000:00:19.0 eth0: Detected Hardware Unit Hang:
[ 75.698775] TDH <96>
[ 75.698775] TDT <9c>
[ 75.698775] next_to_use <9c>
[ 75.698775] next_to_clean <92>
[ 75.698775] buffer_info[next_to_clean]:
[ 75.698775] time_stamp <fffc78bd>
[ 75.698775] next_to_watch <96>
[ 75.698775] jiffies <fffc93dc>
[ 75.698775] next_to_watch.status <0>
[ 75.698775] MAC Status <40080083>
[ 75.698775] PHY Status <796d>
[ 75.698775] PHY 1000BASE-T Status <3800>
[ 75.698775] PHY Extended Status <3000>
[ 75.698775] PCI Status <10>
[ 76.709871] ------------[ cut here ]------------
[ 76.710075] WARNING: CPU: 0 PID: 0 at net/sched/sch_generic.c:303
dev_watchdog+0x17c/0x1e2()
[ 76.710383] NETDEV WATCHDOG: eth0 (e1000e): transmit queue 0 timed
out
[ 76.710572] Modules linked in: xt_CLASSIFY xt_set ipt_REJECT
nf_reject_ipv4 nf_log_ipv4 nf_log_common xt_LOG xt_recent ipt_MASQUERADE
nf_nat_masquerade_ipv4 xt_nat xt_tcpudp nf_nat_pptp nf_nat_proto_gre
nf_conntrack_pptp nf_conntrack_proto_gre ip_set_hash_net ip_set
nfnetlink iptable_mangle iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4
nf_nat_ipv4 nf_nat nf_conntrack iptable_filter ip_tables x_tables
act_nat cls_u32 sch_ingress
[ 76.713354] CPU: 0 PID: 0 Comm: swapper/0 Not tainted
4.3.0-build-0087 #1
[ 76.713547] Hardware name: Intel Corporation SandyBridge Platform/To
be filled by O.E.M., BIOS S1200BT.86B.02.00.0041.120520121743 12/05/2012
[ 76.713868] 0000000000000000 ffff88042f003e08 ffffffff81259d1d
ffff88042f003e50
[ 76.714413] ffff88042f003e40 ffffffff810bda73 ffffffff818654a3
ffff88042c290000
[ 76.714946] ffff8800be758c00 0000000000000001 0000000000000000
ffff88042f003ea0
[ 76.715481] Call Trace:
[ 76.715657] <IRQ> [<ffffffff81259d1d>] dump_stack+0x44/0x55
[ 76.715908] [<ffffffff810bda73>] warn_slowpath_common+0x95/0xae
[ 76.716095] [<ffffffff818654a3>] ? dev_watchdog+0x17c/0x1e2
[ 76.716281] [<ffffffff810bdad3>] warn_slowpath_fmt+0x47/0x49
[ 76.716470] [<ffffffff810f4bcc>] ? mod_timer_pinned+0xaf/0xbe
[ 76.716662] [<ffffffff818654a3>] dev_watchdog+0x17c/0x1e2
[ 76.716850] [<ffffffff81865327>] ? dev_graft_qdisc+0x65/0x65
[ 76.717039] [<ffffffff810f4db8>] call_timer_fn.isra.26+0x17/0x6d
[ 76.717227] [<ffffffff810f4f80>] run_timer_softirq+0x172/0x193
[ 76.717418] [<ffffffff810c0588>] __do_softirq+0xba/0x1a9
[ 76.717606] [<ffffffff810c07bf>] irq_exit+0x37/0x7c
[ 76.717795] [<ffffffff81029c06>] smp_apic_timer_interrupt+0x3d/0x48
[ 76.717988] [<ffffffff818cdccc>] apic_timer_interrupt+0x7c/0x90
[ 76.718179] <EOI> [<ffffffff8100aed5>] ? mwait_idle+0x68/0x7e
[ 76.718436] [<ffffffff8100b2d8>] arch_cpu_idle+0xa/0xc
[ 76.718625] [<ffffffff810e5822>] default_idle_call+0x27/0x29
[ 76.718816] [<ffffffff810e5945>] cpu_startup_entry+0x121/0x1da
[ 76.719008] [<ffffffff818c8970>] rest_init+0x77/0x79
[ 76.719195] [<ffffffff820cde02>] start_kernel+0x40f/0x41c
[ 76.719384] [<ffffffff820cd7e2>] ? set_init_arg+0x55/0x55
[ 76.719572] [<ffffffff820cd442>] x86_64_start_reservations+0x2a/0x2c
[ 76.719764] [<ffffffff820cd4ff>] x86_64_start_kernel+0xbb/0xbe
[ 76.719955] ---[ end trace 6e1862989bd54a50 ]---
[ 76.720145] e1000e 0000:00:19.0 eth0: Reset adapter unexpectedly
[ 80.568051] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow
Control: None
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