On 05/15/2012 07:01 AM, Martin Wilderoth wrote:
Hello, I have a xenhost using rbd device for the guests. In the guest I have a mounted ceph file system. From time to time I get the guest hanging and I have the following error in my logfiles on the guest. Maybe I should not use both rbd and ceph ?
While it's not a well tested configuration, I don't see any reason this wouldn't work. Sage, Alex, are there any shared resources in libceph that would cause problems with this?
May 15 14:13:18 lintx2 kernel: [ 3560.225095] Modules linked in: cryptd aes_x86_64 aes_generic cbc ceph libceph crc32c libcrc32c evdev snd_pcm snd_timer snd soundcore snd_page_alloc pcspkr ext3 jbd mbcache xen_netfront xen_blkfront May 15 14:13:18 lintx2 kernel: [ 3560.225140] Pid: 18, comm: kworker/0:1 Tainted: G W 3.2.0-0.bpo.2-amd64 #1 May 15 14:13:18 lintx2 kernel: [ 3560.225148] Call Trace: May 15 14:13:18 lintx2 kernel: [ 3560.225155] [<ffffffff810497b4>] ? warn_slowpath_common+0x78/0x8c May 15 14:13:18 lintx2 kernel: [ 3560.225167] [<ffffffffa00db647>] ? ceph_add_cap+0x38e/0x49e [ceph] May 15 14:13:18 lintx2 kernel: [ 3560.225178] [<ffffffffa00d220a>] ? fill_inode+0x4eb/0x602 [ceph] May 15 14:13:18 lintx2 kernel: [ 3560.225186] [<ffffffff811157ad>] ? __d_instantiate+0x8b/0xda May 15 14:13:18 lintx2 kernel: [ 3560.225197] [<ffffffffa00d317d>] ? ceph_readdir_prepopulate+0x2de/0x375 [ceph] May 15 14:13:18 lintx2 kernel: [ 3560.225209] [<ffffffffa00e2d3f>] ? dispatch+0xa35/0xef2 [ceph] May 15 14:13:18 lintx2 kernel: [ 3560.225220] [<ffffffffa00ae841>] ? ceph_tcp_recvmsg+0x43/0x4f [libceph] May 15 14:13:18 lintx2 kernel: [ 3560.225231] [<ffffffffa00b0821>] ? con_work+0x1070/0x13b8 [libceph] May 15 14:13:18 lintx2 kernel: [ 3560.225240] [<ffffffff81006f7f>] ? xen_restore_fl_direct_reloc+0x4/0x4 May 15 14:13:18 lintx2 kernel: [ 3560.225248] [<ffffffff81044549>] ? update_curr+0xbc/0x160 May 15 14:13:18 lintx2 kernel: [ 3560.225259] [<ffffffffa00af7b1>] ? try_write+0xbe1/0xbe1 [libceph] May 15 14:13:18 lintx2 kernel: [ 3560.225268] [<ffffffff8105f897>] ? process_one_work+0x1cc/0x2ea May 15 14:13:18 lintx2 kernel: [ 3560.225277] [<ffffffff8105fae2>] ? worker_thread+0x12d/0x247 May 15 14:13:18 lintx2 kernel: [ 3560.225285] [<ffffffff8105f9b5>] ? process_one_work+0x2ea/0x2ea May 15 14:13:18 lintx2 kernel: [ 3560.225294] [<ffffffff810632ed>] ? kthread+0x7a/0x82 May 15 14:13:18 lintx2 kernel: [ 3560.225302] [<ffffffff8136b974>] ? kernel_thread_helper+0x4/0x10 May 15 14:13:18 lintx2 kernel: [ 3560.225311] [<ffffffff81369a33>] ? int_ret_from_sys_call+0x7/0x1b May 15 14:13:18 lintx2 kernel: [ 3560.225319] [<ffffffff8136453c>] ? retint_restore_args+0x5/0x6 May 15 14:13:18 lintx2 kernel: [ 3560.225328] [<ffffffff8136b970>] ? gs_change+0x13/0x13 May 15 14:13:18 lintx2 kernel: [ 3560.225335] ---[ end trace 111652db8892cd8b ]---
The only warning in ceph_add_cap is when it can't lookup the snap realm. I'm not sure if this has any real consequences. Sage? -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
