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?
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