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Subjectbad pages when up/down network cable
1、the host directly link to the storage device,by intel ixgbe NIC;
between them, no switch or router.
2、the nic of the storage device suddenly become unused and then OK
after a little time, this happened frequency.
3、the host printk a lot of message like these:

The kernel is SUSE 3.0.13, use slab, and the following log shows the
page still have PG_slab when free_pages(). Does anyone have seen the
problem?

Jul 9 11:31:36 root kernel: [1042291.977565] BUG: Bad page state in process swapper pfn:00bf2
Jul 9 11:31:36 root kernel: [1042291.977568] page:ffffea0000029cf0 count:0 mapcount:0 mapping: (null) index:0x7f6d4f500
Jul 9 11:31:36 root kernel: [1042291.977571] page flags: 0x40000000000100(slab) // here is the reason
Jul 9 11:31:36 root kernel: [1042291.977574] Pid: 0, comm: swapper Tainted: G B X 3.0.13-0.27-default #1
Jul 9 11:31:36 root kernel: [1042291.977577] Call Trace:
Jul 9 11:31:36 root kernel: [1042291.977583] [<ffffffff810048b5>] dump_trace+0x75/0x300
Jul 9 11:31:36 root kernel: [1042291.977639] [<ffffffff8143ea0f>] dump_stack+0x69/0x6f
Jul 9 11:31:36 root kernel: [1042291.977644] [<ffffffff810f53a1>] bad_page+0xb1/0x120
Jul 9 11:31:37 root kernel: [1042291.977649] [<ffffffff810f5926>] free_pages_prepare+0xe6/0x110
Jul 9 11:31:37 root kernel: [1042291.977654] [<ffffffff810f9259>] free_hot_cold_page+0x49/0x1f0
Jul 9 11:31:37 root kernel: [1042291.977660] [<ffffffff8137a3b4>] skb_release_data+0xb4/0xe0
Jul 9 11:31:37 root kernel: [1042291.977665] [<ffffffff81379e79>] __kfree_skb+0x9/0x90
Jul 9 11:31:37 root kernel: [1042291.977676] [<ffffffffa02784a9>] ixgbe_clean_tx_irq+0xa9/0x480 [ixgbe]
Jul 9 11:31:37 root kernel: [1042291.977693] [<ffffffffa02788cb>] ixgbe_poll+0x4b/0x1a0 [ixgbe]
Jul 9 11:31:37 root kernel: [1042291.977705] [<ffffffff81389c3a>] net_rx_action+0x10a/0x2c0
Jul 9 11:31:37 root kernel: [1042291.977711] [<ffffffff81060a1f>] __do_softirq+0xef/0x220
Jul 9 11:31:37 root kernel: [1042291.977716] [<ffffffff8144a8bc>] call_softirq+0x1c/0x30
Jul 9 11:31:37 root kernel: [1042291.978974] DWARF2 unwinder stuck at call_softirq+0x1c/0x30

Thanks,
Xishi Qiu



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