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xfs_count_page_state inside kswapd

To: xfs@xxxxxxxxxxx
Subject: xfs_count_page_state inside kswapd
From: Tharindu Rukshan Bamunuarachchi <btharindu@xxxxxxxxx>
Date: Tue, 7 Dec 2010 18:26:52 +0530
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Dear All,

We got following oops in one of our SLES 11 server. This occurred inside swapd and we running our server swap turned off..

Could this be memory corruption or possible old bug in code ?

Please help.
Thanks

Dec 6 22:55:46 tm-spes-md102 kernel: BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
Dec 6 22:55:46 tm-spes-md102 kernel: IP: [<ffffffffa0250659>] xfs_count_page_state+0x25/0x66 [xfs]
Dec 6 22:55:46 tm-spes-md102 kernel: PGD 37dc4e067 PUD 16f631067 PMD 0
Dec 6 22:55:46 tm-spes-md102 kernel: Oops: 0000 [1] SMP
Dec 6 22:55:46 tm-spes-md102 kernel: last sysfs file: /sys/devices/pci0000:00/0000:00:03.0/0000:15:00.0/infiniband/mlx4_0/node_type
Dec 6 22:55:46 tm-spes-md102 kernel: CPU 2
Dec 6 22:55:46 tm-spes-md102 kernel: Modules linked in: af_packet st ide_disk ide_cd_mod lp parport_pc ppdev parport nfs lockd nfs_acl
sunrpc ipmi_devintf ipmi_si ipmi_msghandler bonding microcode binfmt_misc rdma_ucm(N) ib_sdp(N) rdma_cm(N) iw_cm(N) ib_addr(N) ib_ipoib(
N) ib_cm(N) ib_sa(N) ipv6 ib_uverbs(N) ib_umad(N) mlx4_en(N) mlx4_ib(N) ib_mthca(N) ib_mad(N) ib_core(N) fuse ext2 xfs loop dm_mod joyde
v cdc_ether rtc_cmos usbhid usbnet rtc_core mlx4_core(N) hid shpchp i2c_i801 pci_hotplug button pcspkr mii sr_mod i2c_core rtc_lib ff_me
mless cdrom sg uhci_hcd sd_mod ehci_hcd crc_t10dif usbcore edd ext3 mbcache jbd fan thermal processor thermal_sys hwmon ide_pci_generic
ide_core ata_generic ata_piix libata dock megaraid_sas scsi_mod [last unloaded: parport_pc]
Dec 6 22:55:46 tm-spes-md102 kernel: Supported: No, Unsupported modules are loaded
Dec 6 22:55:46 tm-spes-md102 kernel: Pid: 58, comm: kswapd0 Tainted: G 2.6.27.45-0.1-default #1
Dec 6 22:55:46 tm-spes-md102 kernel: RIP: 0010:[<ffffffffa0250659>] [<ffffffffa0250659>] xfs_count_page_state+0x25/0x66 [xfs]
Dec 6 22:55:46 tm-spes-md102 kernel: RSP: 0018:ffff88037cdcbbe8 EFLAGS: 00010207
Dec 6 22:55:46 tm-spes-md102 kernel: RAX: ffff88038ceff610 RBX: ffffe20012c30b40 RCX: ffff88037cdcbc34
Dec 6 22:55:46 tm-spes-md102 kernel: RDX: ffff88037cdcbc38 RSI: ffff88037cdcbc3c RDI: ffffe20012c30b40
Dec 6 22:55:46 tm-spes-md102 kernel: RBP: 0000000000000000 R08: 0000000000000021 R09: 0000000000000000
Dec 6 22:55:46 tm-spes-md102 kernel: R10: ffff88038ceff678 R11: ffffffffa0251b18 R12: ffff880517690480
Dec 6 22:55:46 tm-spes-md102 kernel: R13: ffff88037cdcbce0 R14: 00000000002548c2 R15: ffff880517690590
Dec 6 22:55:46 tm-spes-md102 kernel: FS: 0000000000000000(0000) GS:ffff88037e520e40(0000) knlGS:0000000000000000
Dec 6 22:55:46 tm-spes-md102 kernel: CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
Dec 6 22:55:46 tm-spes-md102 kernel: CR2: 0000000000000000 CR3: 000000016f670000 CR4: 00000000000006e0
Dec 6 22:55:46 tm-spes-md102 kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Dec 6 22:55:46 tm-spes-md102 kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Dec 6 22:55:46 tm-spes-md102 kernel: Process kswapd0 (pid: 58, threadinfo ffff88037cdca000, task ffff88037cdc8780)
Dec 6 22:55:47 tm-spes-md102 kernel: Stack: ffffffffa0251b68 0000000000000000 0000000000000001 0000000000000000
Dec 6 22:55:47 tm-spes-md102 kernel: 0000000000000001 0000000000000000 0000000000000000 0000000000000000
Dec 6 22:55:47 tm-spes-md102 kernel: 0000000000000000 00000000002acfa4 0000000000000000 ffffe20012c30b40
Dec 6 22:55:47 tm-spes-md102 kernel: Call Trace:
Dec 6 22:55:47 tm-spes-md102 kernel: [<ffffffffa0251b68>] xfs_vm_releasepage+0x50/0xa5 [xfs]
Dec 6 22:55:47 tm-spes-md102 kernel: [<ffffffff8028bf57>] __invalidate_mapping_pages+0x98/0x12d
Dec 6 22:55:47 tm-spes-md102 kernel: [<ffffffff802c4ca1>] prune_icache+0xe7/0x1f7
Dec 6 22:55:47 tm-spes-md102 kernel: [<ffffffff802c4dc6>] shrink_icache_memory+0x15/0x32
Dec 6 22:55:47 tm-spes-md102 kernel: [<ffffffff8028dc59>] shrink_slab+0xe4/0x157
Dec 6 22:55:47 tm-spes-md102 kernel: [<ffffffff8028e173>] balance_pgdat+0x292/0x3d6
Dec 6 22:55:53 tm-spes-md102 kernel: [<ffffffff8028e3e1>] kswapd+0x12a/0x12c
Dec 6 22:55:53 tm-spes-md102 kernel: [<ffffffff8024fb2f>] kthread+0x47/0x73
Dec 6 22:55:53 tm-spes-md102 kernel: [<ffffffff8020cfb9>] child_rip+0xa/0x11
Dec 6 22:55:53 tm-spes-md102 kernel:
Dec 6 22:55:53 tm-spes-md102 kernel:
Dec 6 22:55:53 tm-spes-md102 kernel: Code: 1f eb ef 90 90 90 c7 01 00 00 00 00 c7 02 00 00 00 00 c7 06 00 00 00 00 48 8b 07 f6 c4 10 75
04 0f 0b eb fe 48 8b 47 10 49 89 c1 <4d> 8b 01 41 f6 c0 01 74 0e 41 f6 c0 20 75 08 c7 02 01 00 00 00
Dec 6 22:55:53 tm-spes-md102 kernel: RIP [<ffffffffa0250659>] xfs_count_page_state+0x25/0x66 [xfs]
Dec 6 22:55:53 tm-spes-md102 kernel: RSP <ffff88037cdcbbe8>
Dec 6 22:55:53 tm-spes-md102 kernel: CR2: 0000000000000000

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Tharindu R Bamunuarachchi.

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