Here is the right crash
----------- [cut here ] --------- [please bite here ] --------- Kernel BUG at mm/slab.c:2649 invalid opcode: 0000 [1] SMP last sysfs file: /class/infiniband/ipath0/node_type CPU 7 Modules linked in: autofs4 hidp rfcomm l2cap bluetooth sunrpc rdma_ucm(U) ib_srp(U) ib_sdp(U) rdma_cm(U) iw_cm(U) ib_add r(U) ib_uverbs(U) ib_umad(U) ib_mthca(U) ib_ipoib(U) ib_cm(U) ib_sa(U) ib_mad(U) ip_conntrack_netbios_ns ipt_REJECT xt_s tate ip_conntrack nfnetlink iptable_filter ip_tables ip6t_REJECT xt_tcpudp ip6table_filter ip6_tables x_tables ipv6 dm_m irror dm_mod video sbs i2c_ec i2c_core button battery asus_acpi acpi_memhotplug ac parport_pc lp parport sg ib_ipath(U) ide_cd ib_core(U) serio_raw cdrom bnx2 shpchp pcspkr mptsas mptscsih mptbase scsi_transport_sas sd_mod scsi_mod ext3 jbd ehci_hcd ohci_hcd uhci_hcd Pid: 8101, comm: fragment Not tainted 2.6.18-8.1.15.el5 #1 RIP: 0010:[<ffffffff80016ebb>] [<ffffffff80016ebb>] cache_grow+0x1e/0x395 RSP: 0018:ffff810010c3dcb8 EFLAGS: 00010006 RAX: 0000000000000000 RBX: 00000000000080d0 RCX: 00000000ffffffff RDX: 0000000000000000 RSI: 00000000000080d0 RDI: ffff810037ff43c0 RBP: ffff81003ffa06e0 R08: ffff8100020bc280 R09: ffff810037e64400 R10: ffff810010c3de68 R11: 000000000000555c R12: ffff810037ff43c0 R13: ffff81003ffa06c0 R14: 0000000000000000 R15: ffff810037ff43c0 FS: 00002aaaaaad7440(0000) GS:ffff8100020bf340(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 00002aaaaaaac000 CR3: 0000000011a7f000 CR4: 00000000000006e0 Process fragment (pid: 8101, threadinfo ffff810010c3c000, task ffff81002cdd3820) Stack: 0000000000000000 0000000000000001 0000000000000296 0000000000000001 ffff810010c3dd18 00000000ffffffff ffff81003ffa06e0 ffff8100020bc280 ffff81003ffa06c0 000000000000000c ffff810037ff43c0 ffffffff8005a5ce Call Trace: [<ffffffff8005a5ce>] cache_alloc_refill+0x136/0x186 [<ffffffff800cc5dc>] kmem_cache_alloc_node+0x98/0xb2 [<ffffffff800c2ae8>] __vmalloc_area_node+0x62/0x153 [<ffffffff800c2e36>] vmalloc_user+0x15/0x50 [<ffffffff88180579>] :ib_ipath:ipath_create_cq+0x67/0x1d6 [<ffffffff80062126>] __down_write_nested+0x12/0x92 [<ffffffff884266cd>] :ib_uverbs:ib_uverbs_create_cq+0x143/0x259 [<ffffffff884231ce>] :ib_uverbs:ib_uverbs_write+0x93/0xa9 [<ffffffff8011a55d>] selinux_file_permission+0x9f/0xb6 [<ffffffff80016122>] vfs_write+0xce/0x174 [<ffffffff800169b3>] sys_write+0x45/0x6e [<ffffffff8005b349>] tracesys+0xd1/0xdc The last one was from an older crash that I picked up by mistake. Bob
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