我在dom0和domU上都使用了CentOS 5.5 x64。 我试图用pciback将3端口网卡（ Realtek Semiconductor Co.，Ltd. RTL-8110SC / 8169SC千兆以太网（rev 10） ）传递给domU。 但是，当NIC上的第一个端口联机时，会导致domU崩溃。 有什么build议么？ （eth0是板载网卡，工作正常）。
编辑：顺便说一句，向domU内核行添加“swiotlb = force”（按照转储build议）会导致domU以相同的错误失败，只有在启动虚拟机后才会立即发生。
Bringing up interface eth0: Determining IP information for eth0... done. [ OK ] Bringing up interface eth1: Determining IP information for eth1...Fatal DMA error! Please use 'swiotlb=force' ----------- [cut here ] --------- [please bite here ] --------- Kernel BUG at arch/x86_64/kernel/../../i386/kernel/pci-dma-xen.c:394 invalid opcode: 0000 [1] SMP last sysfs file: /class/net/eth1/address CPU 0 Modules linked in: be2iscsi ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp bnx2i cnic ipv6 xfrm_nalgo crypto_api uio cxgb3i cxgb3 8021q libiscsi_tcp libiscsi2 scsi_transport_iscsi2 scsi_transport_iscsi loop dm_mirror dm_multipath scsi_dh scsi_mod parport_pc lp parport r8169 mii pcspkr xennet dm_raid45 dm_message dm_region_hash dm_log dm_mod dm_mem_cache xenblk ext3 jbd uhci_hcd ohci_hcd ehci_hcd Pid: 1359, comm: ip Not tainted 2.6.18-194.el5xen #1 RIP: e030:[<ffffffff802723ff>] [<ffffffff802723ff>] dma_map_single+0x12d/0x17d RSP: e02b:ffff880014bedcb8 EFLAGS: 00010282 RAX: 000000000000002f RBX: ffff880014a60012 RCX: ffff880017f01870 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000003724012 R08: 000000000000002c R09: ffff880000def000 R10: 000000000000002d R11: ffff880015d091e0 R12: 0000000000003fff R13: ffff880017f01870 R14: 0000000000000000 R15: 0000000000003fff FS: 00002ad23cbecaf0(0000) GS:ffffffff805d2000(0000) knlGS:0000000000000000 CS: e033 DS: 0000 ES: 0000 Process ip (pid: 1359, threadinfo ffff880014bec000, task ffff8800144b77a0) Stack: 0000000000000002 ffff880015e304c0 ffff880011f61000 0000000000000000 0000000000000002 ffffffff8810b474 0000001e00000000 0000000000000100 ffff880016f64000 ffff880016f64500 Call Trace: [<ffffffff8810b474>] :r8169:rtl8169_rx_fill+0x11e/0x188 [<ffffffff8810c6c6>] :r8169:rtl8169_init_ring+0x70/0x9f [<ffffffff8810c9a3>] :r8169:rtl8169_open+0x9f/0x1c6 [<ffffffff80420ace>] dev_open+0x58/0x97 [<ffffffff8041e9d8>] dev_change_flags+0x5a/0x11a [<ffffffff804534d2>] devinet_ioctl+0x235/0x59c [<ffffffff804162b2>] sock_ioctl+0x1c1/0x1e5 [<ffffffff80244265>] do_ioctl+0x21/0x6b [<ffffffff80231924>] vfs_ioctl+0x457/0x4b9 [<ffffffff8024ea38>] sys_ioctl+0x59/0x78 [<ffffffff80260106>] system_call+0x86/0x8b [<ffffffff80260080>] system_call+0x0/0x8b Code: 0f 0b 68 f6 7e 49 80 c2 8a 01 4d 85 ed 74 11 49 8b 85 18 02 RIP [<ffffffff802723ff>] dma_map_single+0x12d/0x17d RSP <ffff880014bedcb8> <0>Kernel panic - not syncing: Fatal exception 问题是一个错误的网卡驱动程序。 我的研究表明，我可以修补和重新编译驱动程序，但只是交换不同的NIC更容易。