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[Xen-users] trouble with xenserver and xfs (soft lockup - CPU#0 stuck fo

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] trouble with xenserver and xfs (soft lockup - CPU#0 stuck for 61s!)
From: Sebastian Gosenheimer <s.gosenheimer@xxxxxxxxx>
Date: Mon, 26 Apr 2010 13:03:14 +0200
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Hi everybody,

i hope that i'm on the right mailing list. I'm having some trouble with 
xfs and xen. We are running the newest xenserver version with ha on dell 
servers and a dell equalogic.

I set up a fileserver (debian lenny 2.6.29-xs5.5.0.17) with one ext3 
partiton for the os and one xfs partition for the data. Two webserver 
are using this fileserver with nfs.

Now i run the second time into following problem when rsync was running 
for backup:

[212521.428003] BUG: soft lockup - CPU#0 stuck for 61s! [rsync:29921]
[212521.428003] Modules linked in: ipv6 nfsd nfs lockd nfs_acl 
auth_rpcgss sunrpc xenfs xfs exportfs loop evdev xen_netfront pcspkr 
ext3 jbd mbcache xen_blkfront thermal_sys
[212521.428003]
[212521.428003] Pid: 29921, comm: rsync Tainted: G      D 
(2.6.29-xs5.5.0.17 #1)
[212521.428003] EIP: 0061:[<c02f2221>] EFLAGS: 00000287 CPU: 0
[212521.428003] EIP is at __write_lock_failed+0x9/0x1c
[212521.428003] EAX: e1875cbc EBX: c1351e1a ECX: e2407880 EDX: dd004c50
[212521.428003] ESI: 00000000 EDI: c536fd40 EBP: e1875cbc ESP: c1351dac
[212521.428003]  DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0069
[212521.428003] CR0: 8005003b CR2: b806e348 CR3: 20d99000 CR4: 00002620
[212521.428003] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[212521.428003] DR6: ffff0ff0 DR7: 00000400
[212521.428003] Call Trace:
[212521.428003]  [<c02f23a3>] ? _write_lock+0xe/0xf
[212521.428003]  [<e33f7409>] ? xfs_iget+0x328/0x44f [xfs]
[212521.428003]  [<e340e925>] ? xfs_lookup+0x69/0x97 [xfs]
[212521.428003]  [<e341638b>] ? xfs_vn_lookup+0x36/0x6e [xfs]
[212521.428003]  [<c0194ee1>] ? do_lookup+0xa6/0x116
[212521.428003]  [<c019584d>] ? __link_path_walk+0x524/0x631
[212521.428003]  [<c01057fc>] ? xen_force_evtchn_callback+0xc/0x10
[212521.428003]  [<c0195d5c>] ? path_walk+0x4f/0xa3
[212521.428003]  [<c0196aa0>] ? do_path_lookup+0x132/0x178
[212521.428003]  [<c019732e>] ? getname+0x5e/0xb0
[212521.428003]  [<c0197b05>] ? user_path_at+0x37/0x5f
[212521.428003]  [<c0198e80>] ? filldir64+0x0/0xc5
[212521.428003]  [<c019187f>] ? vfs_lstat_fd+0x12/0x3
[212455.928003]  [<c0191912>] ? sys_lstat64+0xf/0x23
[212455.928003]  [<c0199124>] ? vfs_readdir+0x7c/0x8c
[212455.928003]  [<c0198e80>] ? filldir64+0x0/0xc5
[212455.928003]  [<c01991cf>] ? sys_getdents64+0x9b/0xa5
[212455.928003]  [<c0107f23>] ? sysenter_past_esp+0x3c/0x62
[212455.928003]  [<c0107f5b>] ? sysenter_do_call+0x12/0x2f

I have to force reboot to bring the vm back online. Are there any known 
problems with xfs and xen? Because i know from another deployment that 
they are having nearly the same issues with xfs. There are no problems 
with the ext3 filesystem.

Thank you for your help!

-- 
Kind regards,

--sg


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