linux-kernel - bad pages when up/down network cable

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Date:	Tue, 14 Jul 2015 16:31:45 +0800
From:	Xishi Qiu <qiuxishi@...wei.com>
To:	<linux-mm@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>,
	"guozhibin 00179312" <g00179312@...esmail.huawei.com.cn>,
	Xishi Qiu <qiuxishi@...wei.com>, <linux.nics@...el.com>,
	<e1000-devel@...ts.sourceforge.net>
Subject: bad 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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