Pessoal, boa tarde,
Tenho uma máquina configurada o Debian 8, que utiliza o Xen dos repositórios oficiais, porém nesta máquina em momentos que quase não possui tráfego na rede ocorre este problema:
Mar 7 12:51:03 stratosphere kernel: [48573.825133] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.16.0-4-amd64 #1 Debian 3.16.7-ckt20-1+deb8u4
Mar 7 12:51:03 stratosphere kernel: [48573.825135] Hardware name: System manufacturer System Product Name/P8H61-M LE/BR, BIOS 4302 07/06/2012
Mar 7 12:51:03 stratosphere kernel: [48573.825136] ffff8801fe4b5ac4 ffffffff8150dcff ffff8801fe4b5a00 ffffffff810bd3ad
Mar 7 12:51:03 stratosphere kernel: [48573.825138] ffff8801fe4b5a00 0000000000000010 0000000000000000 ffffffff810bd8d1
Mar 7 12:51:03 stratosphere kernel: [48573.825140] 0000000000000000 0000000000000000 0000000000000010 0000000000000000
Mar 7 12:51:03 stratosphere kernel: [48573.825141] Call Trace:
Mar 7 12:51:03 stratosphere kernel: [48573.825143] <IRQ> [<ffffffff8150dcff>] ? dump_stack+0x41/0x51
Mar 7 12:51:03 stratosphere kernel: [48573.825152] [<ffffffff810bd3ad>] ? __report_bad_irq+0x2d/0xc0
Mar 7 12:51:03 stratosphere kernel: [48573.825154] [<ffffffff810bd8d1>] ? note_interrupt+0x241/0x290
Mar 7 12:51:03 stratosphere kernel: [48573.825157] [<ffffffff810bb0f1>] ? handle_irq_event_percpu+0xa1/0x190
Mar 7 12:51:03 stratosphere kernel: [48573.825158] [<ffffffff810bb218>] ? handle_irq_event+0x38/0x60
Mar 7 12:51:03 stratosphere kernel: [48573.825161] [<ffffffff810be413>] ? handle_fasteoi_irq+0x83/0x150
Mar 7 12:51:03 stratosphere kernel: [48573.825163] [<ffffffff810ba4b6>] ? generic_handle_irq+0x26/0x40
Mar 7 12:51:03 stratosphere kernel: [48573.825165] [<ffffffff8135b19a>] ? evtchn_fifo_handle_events+0x16a/0x170
Mar 7 12:51:03 stratosphere kernel: [48573.825168] [<ffffffff8135820f>] ? __xen_evtchn_do_upcall+0x3f/0x70
Mar 7 12:51:03 stratosphere kernel: [48573.825170] [<ffffffff81359e7f>] ? xen_evtchn_do_upcall+0x2f/0x50
Mar 7 12:51:03 stratosphere kernel: [48573.825172] [<ffffffff81515b5e>] ? xen_do_hypervisor_callback+0x1e/0x30
Mar 7 12:51:03 stratosphere kernel: [48573.825173] <EOI> [<ffffffff810013aa>] ? xen_hypercall_sched_op+0xa/0x20
Mar 7 12:51:03 stratosphere kernel: [48573.825177] [<ffffffff810013aa>] ? xen_hypercall_sched_op+0xa/0x20
Mar 7 12:51:03 stratosphere kernel: [48573.825179] [<ffffffff81009e7c>] ? xen_safe_halt+0xc/0x20
Mar 7 12:51:03 stratosphere kernel: [48573.825182] [<ffffffff8101c8c9>] ? default_idle+0x19/0xb0
Mar 7 12:51:03 stratosphere kernel: [48573.825184] [<ffffffff810a8120>] ? cpu_startup_entry+0x340/0x400
Mar 7 12:51:03 stratosphere kernel: [48573.825187] [<ffffffff81903076>] ? start_kernel+0x497/0x4a2
Mar 7 12:51:03 stratosphere kernel: [48573.825189] [<ffffffff81902a04>] ? set_init_arg+0x4e/0x4e
Mar 7 12:51:03 stratosphere kernel: [48573.825191] [<ffffffff81904f69>] ? xen_start_kernel+0x569/0x573
Então após ocorrer este problema o tráfego que passa pela mesma começa a ficar lento até perder muitos pacotes e quase parar a rede.