xen pvonhvm bug

[  752.577291] ------------[ cut here ]------------
[  752.577298] WARNING: at net/core/skbuff.c:3442 skb_try_coalesce+0x383/0x3c0()
[  752.577300] Hardware name: HVM domU
[  752.577301] Modules linked in: xt_tcpudp xt_pkttype xt_LOG xt_limit ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_raw ipt_REJECT iptable_raw iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4 nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack ip6table_filter ip6_tables x_tables microcode mperf dm_mod snd_hda_codec_hdmi snd_hda_intel crc32c_intel snd_hda_codec ghash_clmulni_intel snd_ens1370 aesni_intel snd_hwdep gameport ablk_helper cryptd snd_rawmidi snd_seq_device snd_pcm lrw aes_x86_64 xts joydev gf128mul snd_timer ata_generic snd hid_generic ppdev ata_piix parport_pc soundcore parport snd_page_alloc i2c_piix4 button floppy pcspkr autofs4 usbhid ohci_hcd uhci_hcd ehci_hcd usbcore processor thermal_sys usb_common [last unloaded: microcode]
[  752.577340] Pid: 3045, comm: sshd Tainted: G        W    3.7.0-rc2-1-default #5
[  752.577341] Call Trace:
[  752.577343]  <IRQ>  [<ffffffff8109f10a>] warn_slowpath_common+0x7a/0xb0
[  752.577349]  [<ffffffff8109f155>] warn_slowpath_null+0x15/0x20
[  752.577351]  [<ffffffff814e7403>] skb_try_coalesce+0x383/0x3c0
[  752.577354]  [<ffffffff81537caf>] tcp_try_coalesce.part.50+0x2f/0x90
[  752.577356]  [<ffffffff8153ac14>] tcp_queue_rcv+0x104/0x120
[  752.577358]  [<ffffffff8153e048>] tcp_rcv_established+0x408/0x780
[  752.577361]  [<ffffffff81546db1>] tcp_v4_do_rcv+0x141/0x200
[  752.577362]  [<ffffffff81548af9>] tcp_v4_rcv+0x559/0x820
[  752.577364]  [<ffffffff8151e2c5>] ? nf_hook_slow+0x75/0x150
[  752.577366]  [<ffffffff81524500>] ? ip_rcv_finish+0x360/0x360
[  752.577368]  [<ffffffff815245d6>] ip_local_deliver_finish+0xd6/0x270
[  752.577369]  [<ffffffff815248f5>] ip_local_deliver+0x45/0x80
[  752.577371]  [<ffffffff815242b9>] ip_rcv_finish+0x119/0x360
[  752.577373]  [<ffffffff81524b3d>] ip_rcv+0x20d/0x2f0
[  752.577375]  [<ffffffff814f3ab2>] __netif_receive_skb+0x5e2/0x750
[  752.577376]  [<ffffffff814f3c3e>] netif_receive_skb+0x1e/0x80
[  752.577379]  [<ffffffff8147367b>] handle_incoming_queue+0xdb/0xe0
[  752.577381]  [<ffffffff81474349>] xennet_poll+0x279/0x420
[  752.577382]  [<ffffffff81473092>] ? xennet_tx_buf_gc+0x162/0x190
[  752.577384]  [<ffffffff814f5049>] net_rx_action+0x139/0x250
[  752.577386]  [<ffffffff810a75a8>] __do_softirq+0xb8/0x240
[  752.577389]  [<ffffffff81605adc>] call_softirq+0x1c/0x30
[  752.577391]  [<ffffffff8105f325>] do_softirq+0x65/0xa0
[  752.577392]  [<ffffffff810a788e>] irq_exit+0x8e/0xb0
[  752.577395]  [<ffffffff813c7bcf>] xen_evtchn_do_upcall+0x2f/0x40
[  752.577397]  [<ffffffff81605c6d>] xen_hvm_callback_vector+0x6d/0x80
[  752.577398]  <EOI>  [<ffffffff81604869>] ? system_call_fastpath+0x16/0x1b
[  752.577400] ---[ end trace 4dbd6f8d2234fde1 ]---