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Re: [Xen-users] pv_ops 2.6.31.6

from [Pasi Kärkkäinen] [Permanent Link][Original]
To: Ian Tobin <itobin@xxxxxxxxxxxxx>
Subject: Re: [Xen-users] pv_ops 2.6.31.6
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Fri, 22 Jan 2010 13:23:20 +0200
Cc: "Olivier B." <xen.list@xxxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
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On Fri, Jan 22, 2010 at 10:52:04AM -0000, Ian Tobin wrote:
> Ive got a major performance issue.  If i boot up the dom0 without starting 
> xen and copy a large file to it via ftp its fine.
> 
> As soon as i run xend start the Dom0 gets slower and slower until the server 
> is at a crawl so its unusable.
> 
> Anyone else getting slow response?
> 

I haven't seen that.

Please monitor your dom0 with "top" and also with "xm top". 

What do they reveal? Does some process start eating more and more CPU time? 
Does some process leak memory? Does dom0 have iowait? 

Did you limit dom0_mem=512M or similar? 

-- Pasi

> 
> 
> 
> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Olivier B.
> Sent: 22 January 2010 08:34
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] pv_ops 2.6.31.6
> 
> For me restore/live migration doesn't work.
> 
> For dom0 I use the version 2.6.31.6 00751-g600545, with vanilla 
> 2.6.31.12 pv_ops version on domU, and debian xen 3.4.2-2
> 
> On restore I obtain that :
> 
> [49532.764004] <4>------------[ cut here ]------------
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] <4>WARNING: at arch/x86/xen/time.c:180 
> xen_sched_clock+0x7c/0xaf()
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] <d>Modules linked in:
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  nf_conntrack_ipv4
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  nf_defrag_ipv4
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  xt_state
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  nf_conntrack
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  dm_snapshot
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [last unloaded: scsi_wait_scan]
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] Pid: 30422, comm: kstop/0 Tainted: G        W  
> 2.6.31.12-dae-xen #1
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] Call Trace:
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff8104e0d1>] warn_slowpath_common+0x88/0xb6
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff8104e121>] warn_slowpath_null+0x22/0x38
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff8100dc4f>] xen_sched_clock+0x7c/0xaf
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff8101829d>] sched_clock+0x9/0xd
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff8106b73b>] sched_clock_cpu+0xa7/0x168
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff81047d4b>] update_rq_clock+0x26/0x48
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff81048c11>] try_to_wake_up+0xac/0x2af
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff8101135d>] ? retint_restore_args+0x5/0x6
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff81048e34>] default_wake_function+0x20/0x36
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff8103bcdd>] __wake_up_common+0x58/0xa2
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff8106120e>] ? wq_barrier_func+0x0/0x36
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff8103e07d>] complete+0x49/0x73
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff8106122e>] wq_barrier_func+0x20/0x36
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff81060d8d>] worker_thread+0x156/0x20d
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff8100dd1f>] ? xen_restore_fl_direct_end+0x0/0x1
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff81065b7f>] ? autoremove_wake_function+0x0/0x5a
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff81060c37>] ? worker_thread+0x0/0x20d
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff81065759>] kthread+0x9b/0xa3
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff810119ea>] child_rip+0xa/0x20
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff81010bac>] ? int_ret_from_sys_call+0x7/0x1b
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff8101135d>] ? retint_restore_args+0x5/0x6
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] BUG: recent printk recursion!
> [49532.764004]  [<ffffffff810119e0>] ? child_rip+0x0/0x20
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] <4>---[ end trace bbe4ba0e56e4a4ae ]---
> [49532.764004] BUG: recent printk recursion!
> [49532.764004] <4>------------[ cut here ]------------
> 
> 
> But except that, it works fine.
> 
> Olivier
> 
> Pasi Kärkkäinen a écrit :
> > On Thu, Jan 21, 2010 at 09:01:21PM -0000, Ian Tobin wrote:
> >   
> >>    Hi,
> >>
> >>
> >>
> >>    Quick question, is the 2.6.31.6 kernel in Jermeys tree stable enough 
> >> for a
> >>    live environment?  Ive been playing with it and seems to work quite 
> >> well.
> >>
> >>     
> >
> > It works for many people.. so please keep using it, and report any 
> > issues/bugs found. 
> >
> > Also make sure you monitor the changelogs, it's still under development so 
> > you want to
> > upgrade every now and then to get the latest bits.
> >
> > xen/master branch changelog:
> > http://git.kernel.org/?p=linux/kernel/git/jeremy/xen.git;a=shortlog;h=xen/master
> >
> > Whole git tree changelog:
> > http://git.kernel.org/?p=linux/kernel/git/jeremy/xen.git
> >
> > -- Pasi
> >
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
> >   
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
> 
> 
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users

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