I am trying to export RAMDISK over NFSv4 and got following kernel oops. Kernel is tainted due to OFED-1.5.1 installation. what could be possible reason behind oops ? I am allocating 10G of RAMDISK (tmpfs) in 24GB box. I think this is due to lack of free memory in box ? could this be a kernel bug ? what is the purpose of __vm_enough_memory call ? This is SLES 11 2.6.27.45 kernel with OFED-1.5.1 (tainted due to OFED) BUG: unable to handle kernel NULL pointer dereference at 00000000000000b0 IP: [<ffffffff80299677>] __vm_enough_memory+0xf9/0x14e PGD 0 Oops: 0000 [1] SMP last sysfs file: /sys/devices/pci0000:00/0000:00:09.0/0000:24:00.0/infiniband/mlx4_1/node_desc CPU 0 Modules linked in: md5 mmfs26(X) mmfslinux(X) tracedev(X) nfsd lockd nfs_acl auth_rpcgss sunrpc exportfs bonding binfmt_misc microcode 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 cdc_ether usbnet i2c_i801 rtc_cmos shpchp button joydev mlx4_core(N) rtc_core pcspkr pci_hotplug sr_mod rtc_lib mii bnx2 i2c_core cdrom sg usbhid hid ff_memless uhci_hcd ehci_hcd sd_mod 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: tracedev] Supported: No, Unsupported modules are loaded Pid: 8855, comm: nfsd Tainted: G 2.6.27.45-0.1-default #1 RIP: 0010:[<ffffffff80299677>] [<ffffffff80299677>] __vm_enough_memory+0xf9/0x14e RSP: 0018:ffff8803642cd780 EFLAGS: 00010202 RAX: 00000000002f151c RBX: 0000000012643f22 RCX: 0000000000400293 RDX: 0000000000000032 RSI: 0000000000000001 RDI: 00000000002f151c RBP: 0000000000000001 R08: 00000000ffffffe5 R09: 0000000000000000 R10: ffffffff806eb5c8 R11: ffffffff80317108 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000001000 R15: ffff88037b93b738 FS: 0000000000000000(0000) GS:ffffffff80a43080(0000) knlGS:0000000000000000 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: 00000000000000b0 CR3: 0000000000201000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process nfsd (pid: 8855, threadinfo ffff8803642cc000, task ffff88036f140380) Stack: ffff88037b93b668 ffff88037009de40 ffff88037b93b668 0000000000000000 ffff88037b93b601 ffffffff802a8573 ffffffff80a33680 ffffffff80a30730 0000000000000000 0000000300000002 ffff8803642cd930 0000000000000000 Call Trace: [<ffffffff802a8573>] shmem_getpage+0x4d8/0x764 [<ffffffff80282605>] generic_perform_write+0xae/0x1b5 [<ffffffff8028436c>] generic_file_buffered_write+0x80/0x130 [<ffffffff802848fb>] __generic_file_aio_write_nolock+0x349/0x37d [<ffffffff80284d30>] generic_file_aio_write+0x64/0xc4 [<ffffffff802b1658>] do_sync_readv_writev+0xc0/0x107 [<ffffffff802b1d15>] do_readv_writev+0xb2/0x18b [<ffffffffa04779e3>] nfsd_vfs_write+0x10a/0x328 [nfsd] [<ffffffffa04783b1>] nfsd_write+0x79/0xe2 [nfsd] [<ffffffffa04818e4>] nfsd4_write+0xd9/0x10d [nfsd] [<ffffffffa0481e65>] nfsd4_proc_compound+0x1bd/0x2c7 [nfsd] [<ffffffffa0473238>] nfsd_dispatch+0xdd/0x1b9 [nfsd] [<ffffffffa0426fef>] svc_process+0x3d8/0x700 [sunrpc] [<ffffffffa04737f8>] nfsd+0x1b1/0x27e [nfsd] [<ffffffff8024fb2f>] kthread+0x47/0x73 [<ffffffff8020cfb9>] child_rip+0xa/0x11 Code: 00 48 29 c3 48 63 05 49 1a 45 00 48 0f af d8 48 89 d8 48 f7 f1 45 85 e4 48 89 c7 75 07 48 c1 e8 05 48 29 c7 48 8b 0d b9 2f 86 00 <49> 8b b5 b0 00 00 00 48 8b 15 43 2f 86 00 b8 01 00 00 00 48 85 RIP [<ffffffff80299677>] __vm_enough_memory+0xf9/0x14e RSP <ffff8803642cd780> CR2: 00000000000000b0 ---[ end trace ca3d7c15970cb4b6 ]--- __ tharindu.info "those that can, do. Those that can’t, complain." -- Linus -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
