Re: [Xen-devel] Xenoprofile on 2.6.27.hg xen dom0 kernel - cannot shotdown

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

This is the result of the tree you're using not really being maintained - the
bug you describe has long been fixed, but as you can see, the tree saw
just a single update over its whole life time.

For that particular issue, you will want to this change to
unbind_from_percpu_irq():

        if (VALID_EVTCHN(evtchn)) {
                struct irq_desc *desc = irq_desc + irq;
 
+               mask_evtchn(evtchn);
+
                BUG_ON(irq_bindcount[irq] <= 1);
                irq_bindcount[irq]--;
 

Jan

>>> Muhammad Atif <m_atif_s@xxxxxxxxx> 24.08.09 11:50 >>>
Hi
I tried using Xen 3.3 on Sun Ultra 45 machine running a Intel Core 2  Q6600 
(quard core). I never got 2.6.18 kernel (dom0) going on that machine so tried 
2.6.27-xen.hg kernel which worked.  
When I tried profiling (passive profiling) I got an error about the code 
1....... patched the 2.6.27-xen.hg kernel using the patch as suggested by 
[PATCH] Oprofile patch for 2.6.27 tree. Fix collision between Xen and Cell 
processor escape codes - http://markmail.org/thread/mmc532fxxt733kgi 

xenoprofile works with this patch and I am able to do  profiling and see 
results. But as soon as i try to shutdown profile using opcontrol --shutdown, 
my kernel gives the error pasted at the end of the message. 

After this, my system does not respond and does not even reboot (unless i do it 
manually). 
Any ideas? Please suggest if I need to provide more information.

---------------------------------------------------------------------------------------------------------------------------------------------------

[ 3067.492083] kernel BUG at 
/usr/src/linux-2.6.27-xen.hg/drivers/xen/core/evtchn.c:204!
[ 3067.492134] invalid opcode: 0000 [1] SMP
[ 3067.492182] last sysfs file: 
/sys/devices/xen-backend/vbd-1-2050/statistics/wr_sect
[ 3067.492230] CPU 2
[ 3067.492257] Modules linked in: oprofile(N) xt_physdev(N) bridge(N) stp(N) 
ipv6(N) nfs(N) lockd(N) nfs_acl(N) sunrpc(N) iptable_filter(N) ip_tables(N) 
x_tables(N) ac(N) sbp2(N) parport_pc(N) lp(N) parport(N) loop(N) psmouse(N) 
tpm_infineon(N) snd_hda_intel(N) tpm(N) serio_raw(N) pcspkr(N) snd_pcm(N) 
tpm_bios(N) snd_timer(N) snd(N) soundcore(N) shpchp(N) button(N) evdev(N) 
pci_hotplug(N) snd_page_alloc(N) iTCO_wdt(N) ext3(N) jbd(N) mbcache(N) sg(N) 
sd_mod(N) usbhid(N) ide_pci_generic(N) ide_core(N) ata_generic(N) hid(N) 
ff_memless(N) ata_piix(N) libata(N) ohci1394(N) scsi_mod(N) ieee1394(N) dock(N) 
uhci_hcd(N) ehci_hcd(N) e1000e(N) thermal(N) processor(N) fan(N) thermal_sys(N) 
fuse(N)
[ 3067.492732] Supported: No
[ 3067.492757] Pid: 4367, comm: oprofiled Tainted: G          2.6.27.5 #1
[ 3067.492789] RIP: e030:[<ffffffff80391be5>]  [<ffffffff80391be5>] 
bind_evtchn_to_cpu+0x1d/0xa7
[ 3067.492843] RSP: e02b:ffff8800cd19bdc0  EFLAGS: 00010246
[ 3067.492872] RAX: 0000000000000000 RBX: 000000000000002b RCX: ffffffff80598a00
[ 3067.492905] RDX: 000000000000050b RSI: 0000000000000000 RDI: 000000000000002b
[ 3067.492938] RBP: 0000000000000000 R08: 0000000000000020 R09: ffffffff806711e8
[ 3067.492970] R10: 0000000000000002 R11: 000000000000000c R12: 0000000000000000
[ 3067.493003] R13: ffffffffa0349a40 R14: 000000000000050b R15: ffff8800cd027090
[ 3067.493037] FS:  00007f2a2c0456e0(0000) GS:ffff880001a9b540(0000) 
knlGS:0000000000000000
[ 3067.493087] CS:  e033 DS: 0000 ES: 0000
[ 3067.493114] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 3067.493147] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 3067.493179] Process oprofiled (pid: 4367, threadinfo ffff8800cd19a000, task 
ffff8800ec4fb3d0)
[ 3067.493228] Stack:  ffffffff80392f98 000000000000002b ffff8800cd13a6b0 
0000000000000000
[ 3067.493295]  0000000000000000 ffff8800e99c0910 ffff8800e9bb22f0 
ffff8800ebcf00c0
[ 3067.493357]  ffffffffa0345284 ffff8800cd027090 ffff8800ecb9b600 
ffff8800ecb9b600
[ 3067.493400] Call Trace:
[ 3067.493445]  [<ffffffff80392f98>] unbind_from_per_cpu_irq+0x1ab/0x1ff
[ 3067.493481]  [<ffffffffa0345284>] unbind_virq+0x26/0x4a [oprofile]
[ 3067.493516]  [<ffffffffa0345312>] xenoprof_shutdown+0x6a/0xae [oprofile]
[ 3067.493551]  [<ffffffffa034310b>] oprofile_shutdown+0x35/0x57 [oprofile]
[ 3067.493586]  [<ffffffffa0344072>] event_buffer_release+0xe/0x3b [oprofile]
[ 3067.493620]  [<ffffffff802963a5>] __fput+0xa1/0x165
[ 3067.493649]  [<ffffffff802937cc>] filp_close+0x5b/0x62
[ 3067.493679]  [<ffffffff80231baf>] put_files_struct+0x65/0xc4
[ 3067.493710]  [<ffffffff802336e9>] do_exit+0x25b/0x87a
[ 3067.493739]  [<ffffffff80233da7>] do_group_exit+0x9f/0xcb
[ 3067.493769]  [<ffffffff8020a838>] system_call_fastpath+0x16/0x1b
[ 3067.493801]  [<ffffffff8020a7d0>] system_call+0x0/0x52
[ 3067.493829]
[ 3067.493851]
[ 3067.493873] Code: 48 c7 c7 60 d1 66 80 41 58 e9 c8 1d f9 ff 89 f8 8b 14 85 
a0 b2 54 80 48 8b 05 88 c1 19 00 0f a3 b8 00 0a 00 00 19 c0 85 c0 75 04 <0f> 0b 
eb fe 83 fa ff 74 48 48 63 ca 48 c1 e1 07 f6 81 b2 64 56
[ 3067.494219] RIP  [<ffffffff80391be5>] bind_evtchn_to_cpu+0x1d/0xa7
[ 3067.494253]  RSP <ffff8800cd19bdc0>
[ 3067.494832] ---[ end trace fcf599f1222809c1 ]---
[ 3067.494927] Fixing recursive fault but reboot is needed!


Best Regards,
Muhammad Atif



      

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