<div dir="ltr"><div>ok will do.</div>
<div>Just a little background:</div>
<div>We are doing reads of up to 220MB/s for 20min (aggregated on all 10 nodes) and towards the end of the 20min we are</div>
<div>writing ~45 x 2k files to the OCFS2 volume. During the read, I notice that the Cache Buffers on all the nodes are exhausted .</div>
<div> </div>
<div>This oops only happens currently on one of the nodes. I am relucatnt to force a reboot on oops.</div>
<div>Is this a must?</div>
<div> </div>
<div>Thanks</div>
<div>Laurence</div>
<div> </div>
<div><br><br> </div>
<div class="gmail_quote">On Thu, Sep 24, 2009 at 8:06 PM, Sunil Mushran <span dir="ltr"><<a href="mailto:sunil.mushran@oracle.com">sunil.mushran@oracle.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">So a read on some file on a xfs volume, triggered a mem alloc which inturn<br>triggered the kernel to free up some memory. The oops happens when it is<br>
trying to free up an ocfs2 inode.<br><br>Do:<br># cat /proc/sys/kernel/panic_on_oops<br><br>If this returns 0, do:<br># echo 1 > /proc/sys/kernel/panic_on_oops<br>This is documented in the user's guide.<br><br>File a bugzilla in <a href="http://oss.oracle.com/bugzilla" target="_blank">oss.oracle.com/bugzilla</a>. _Attach_ this oops report.<br>
Do not cut-paste. It is hard to read. Also _attach_ the objdump output.<br># objdump -DSl /lib/modules/`uname -r`/kernel/fs/ocfs2/ocfs2.ko >/tmp/ocfs2.out<br><br>Bottomline, that it is working just means that you will encounter the problem<br>
later. The problem in this case will most likely be another oops. Or, a hang.<br><br>Upload the outputs. I'll try to see if we have already addressed this issue.<br>This kernel is fairly old, btw.<br><br>Sunil<br><br>
Laurence Mayer wrote:<br>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div>
<div></div>
<div class="h5">OS: Ubuntu 8.04 x64<br>Kern: Linux n1 2.6.24-24-server #1 SMP Tue Jul 7 19:39:36 UTC 2009 x86_64 GNU/Linux<br>10 Node Cluster<br>OCFS2 Version:<br>ocfs2-tools 1.3.9-0ubuntu1 ocfs2-tools-static-dev 1.3.9-0ubuntu1 ocfs2console 1.3.9-0ubuntu1 <br>
root@n1:~# cat /proc/meminfo<br>MemTotal: 16533296 kB<br>MemFree: 47992 kB<br>Buffers: 179240 kB<br>Cached: 13185084 kB<br>SwapCached: 72 kB<br>Active: 4079712 kB<br>Inactive: 12088860 kB<br>
SwapTotal: 31246416 kB<br>SwapFree: 31246344 kB<br>Dirty: 2772 kB<br>Writeback: 4 kB<br>AnonPages: 2804460 kB<br>Mapped: 51556 kB<br>Slab: 223976 kB<br>SReclaimable: 61192 kB<br>
SUnreclaim: 162784 kB<br>PageTables: 12148 kB<br>NFS_Unstable: 8 kB<br>Bounce: 0 kB<br>CommitLimit: 39513064 kB<br>Committed_AS: 3698728 kB<br>VmallocTotal: 34359738367 kB<br>VmallocUsed: 53888 kB<br>
VmallocChunk: 34359684419 kB<br>HugePages_Total: 0<br>HugePages_Free: 0<br>HugePages_Rsvd: 0<br>HugePages_Surp: 0<br>Hugepagesize: 2048 kB<br><br>I have started seeing the below on one of the nodes. The node does not reboot it continues to function "normally"<br>
<br>Is this a memory issue?<br><br>Please can you provide direction.<br><br><br>Sep 24 16:31:46 n1 kernel: [75206.689992] CPU 0<br>Sep 24 16:31:46 n1 kernel: [75206.690018] Modules linked in: ocfs2 crc32c libcrc32c nfsd auth_rpcgss exportfs ipmi_devintf ipmi_si ipmi_msghandler ipv6 ocfs2_dlmfs ocfs2_dlm ocfs2_nodemanager configfs iptable_filter ip_tables x_tables xfs ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi scsi_transport_iscsi nfs lockd nfs_acl sunrpc parport_pc lp parport loop serio_raw psmouse i2c_piix4 i2c_core dcdbas evdev button k8temp shpchp pci_hotplug pcspkr ext3 jbd mbcache sg sr_mod cdrom sd_mod ata_generic pata_acpi usbhid hid ehci_hcd tg3 sata_svw pata_serverworks ohci_hcd libata scsi_mod usbcore thermal processor fan fbcon tileblit font bitblit softcursor fuse<br>
Sep 24 16:31:46 n1 kernel: [75206.690455] Pid: 15931, comm: read_query Tainted: G D 2.6.24-24-server #1<br>Sep 24 16:31:46 n1 kernel: [75206.690509] RIP: 0010:[<ffffffff8856c404>] [<ffffffff8856c404>] :ocfs2:ocfs2_meta_lock_full+0x6a4/0xec0<br>
Sep 24 16:31:46 n1 kernel: [75206.690591] RSP: 0018:ffff8101c64c9848 EFLAGS: 00010292<br>Sep 24 16:31:46 n1 kernel: [75206.690623] RAX: 0000000000000092 RBX: ffff81034ba74000 RCX: 00000000ffffffff<br>Sep 24 16:31:46 n1 kernel: [75206.690659] RDX: 00000000ffffffff RSI: 0000000000000000 RDI: ffffffff8058ffa4<br>
Sep 24 16:31:46 n1 kernel: [75206.690695] RBP: 0000000100080000 R08: 0000000000000000 R09: 00000000ffffffff<br>Sep 24 16:31:46 n1 kernel: [75206.690730] R10: 0000000000000000 R11: 0000000000000000 R12: ffff81033fca4e00<br>
Sep 24 16:31:46 n1 kernel: [75206.690766] R13: ffff81033fca4f08 R14: ffff81033fca52b8 R15: ffff81033fca4f08<br>Sep 24 16:31:46 n1 kernel: [75206.690802] FS: 00002b312f0119f0(0000) GS:ffffffff805c5000(0000) knlGS:00000000f546bb90<br>
Sep 24 16:31:46 n1 kernel: [75206.690857] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b<br>Sep 24 16:31:46 n1 kernel: [75206.690890] CR2: 00002b89f1e81000 CR3: 0000000168971000 CR4: 00000000000006e0<br>Sep 24 16:31:46 n1 kernel: [75206.690925] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000<br>
Sep 24 16:31:46 n1 kernel: [75206.690961] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400<br>Sep 24 16:31:46 n1 kernel: [75206.690998] Process read_query (pid: 15931, threadinfo ffff8101c64c8000, task ffff81021543f7d0)<br>
Sep 24 16:31:46 n1 kernel: [75206.691054] Stack: ffff810243c402af ffff810243c40299 ffff81021b462408 000000011b462440<br>Sep 24 16:31:46 n1 kernel: [75206.691116] ffff8101c64c9910 0000000100000000 ffff810217564e00 ffffffff8029018a<br>
Sep 24 16:31:46 n1 kernel: [75206.691176] 0000000000000296 0000000000000001 ffffffffffffffff ffff81004c052f70<br>Sep 24 16:31:46 n1 kernel: [75206.691217] Call Trace:<br>Sep 24 16:31:46 n1 kernel: [75206.691273] [isolate_lru_pages+0x8a/0x210] isolate_lru_pages+0x8a/0x210<br>
Sep 24 16:31:46 n1 kernel: [75206.691323] [<ffffffff8857d4db>] :ocfs2:ocfs2_delete_inode+0x16b/0x7e0<br>Sep 24 16:31:46 n1 kernel: [75206.691362] [shrink_inactive_list+0x202/0x3c0] shrink_inactive_list+0x202/0x3c0<br>
Sep 24 16:31:46 n1 kernel: [75206.691409] [<ffffffff8857d370>] :ocfs2:ocfs2_delete_inode+0x0/0x7e0<br>Sep 24 16:31:46 n1 kernel: [75206.691449] [fuse:generic_delete_inode+0xa8/0x450] generic_delete_inode+0xa8/0x140<br>
Sep 24 16:31:46 n1 kernel: [75206.691495] [<ffffffff8857cd6d>] :ocfs2:ocfs2_drop_inode+0x7d/0x160<br>Sep 24 16:31:46 n1 kernel: [75206.691533] [d_kill+0x3c/0x70] d_kill+0x3c/0x70<br>Sep 24 16:31:46 n1 kernel: [75206.691566] [prune_one_dentry+0xc1/0xe0] prune_one_dentry+0xc1/0xe0<br>
Sep 24 16:31:46 n1 kernel: [75206.691600] [prune_dcache+0x166/0x1c0] prune_dcache+0x166/0x1c0<br>Sep 24 16:31:46 n1 kernel: [75206.691635] [shrink_dcache_memory+0x3e/0x50] shrink_dcache_memory+0x3e/0x50<br>Sep 24 16:31:46 n1 kernel: [75206.691670] [shrink_slab+0x124/0x180] shrink_slab+0x124/0x180<br>
Sep 24 16:31:46 n1 kernel: [75206.691707] [try_to_free_pages+0x1e4/0x2f0] try_to_free_pages+0x1e4/0x2f0<br>Sep 24 16:31:46 n1 kernel: [75206.691749] [__alloc_pages+0x196/0x3d0] __alloc_pages+0x196/0x3d0<br>Sep 24 16:31:46 n1 kernel: [75206.691790] [__do_page_cache_readahead+0xe0/0x210] __do_page_cache_readahead+0xe0/0x210<br>
Sep 24 16:31:46 n1 kernel: [75206.691834] [ondemand_readahead+0x117/0x1c0] ondemand_readahead+0x117/0x1c0<br>Sep 24 16:31:46 n1 kernel: [75206.691871] [do_generic_mapping_read+0x13d/0x3c0] do_generic_mapping_read+0x13d/0x3c0<br>
Sep 24 16:31:46 n1 kernel: [75206.691908] [file_read_actor+0x0/0x160] file_read_actor+0x0/0x160<br>Sep 24 16:31:46 n1 kernel: [75206.691949] [xfs:generic_file_aio_read+0xff/0x1b0] generic_file_aio_read+0xff/0x1b0<br>Sep 24 16:31:46 n1 kernel: [75206.692026] [xfs:xfs_read+0x11c/0x250] :xfs:xfs_read+0x11c/0x250<br>
Sep 24 16:31:46 n1 kernel: [75206.692067] [xfs:do_sync_read+0xd9/0xbb0] do_sync_read+0xd9/0x120<br>Sep 24 16:31:46 n1 kernel: [75206.692101] [getname+0x1a9/0x220] getname+0x1a9/0x220<br>Sep 24 16:31:46 n1 kernel: [75206.692140] [<ffffffff80254530>] autoremove_wake_function+0x0/0x30<br>
Sep 24 16:31:46 n1 kernel: [75206.692185] [vfs_read+0xed/0x190] vfs_read+0xed/0x190<br>Sep 24 16:31:46 n1 kernel: [75206.692220] [sys_read+0x53/0x90] sys_read+0x53/0x90<br>Sep 24 16:31:46 n1 kernel: [75206.692256] [system_call+0x7e/0x83] system_call+0x7e/0x83<br>
Sep 24 16:31:46 n1 kernel: [75206.692293]<br>Sep 24 16:31:46 n1 kernel: [75206.692316]<br>Sep 24 16:31:46 n1 kernel: [75206.692317] Code: 0f 0b eb fe 83 fd fe 0f 84 73 fc ff ff 81 fd 00 fe ff ff 0f<br>Sep 24 16:31:46 n1 kernel: [75206.692483] RSP <ffff8101c64c9848><br>
<br><br>Thanks<br>Laurence<br><br></div></div>_______________________________________________<br>Ocfs2-users mailing list<br><a href="mailto:Ocfs2-users@oss.oracle.com" target="_blank">Ocfs2-users@oss.oracle.com</a><br><a href="http://oss.oracle.com/mailman/listinfo/ocfs2-users" target="_blank">http://oss.oracle.com/mailman/listinfo/ocfs2-users</a><br>
<br></blockquote><br></blockquote></div><br></div>