From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: radeon in dom0/ivtv in domU: irq 16 nobody cared
Date: Mon, 19 Apr 2010 10:08:49 -0400
Message-ID: <20100419140849.GA20776@phenom.dumpdata.com>
References: <AEB83A1C-247E-4B52-AB14-977664379FDE@xs4all.nl>
	<20100413125741.GA16475@phenom.dumpdata.com>
	<504848C9-52F2-46C5-BD0E-1C2B35BA1A02@xs4all.nl>
	<201004170238.31591.mark.hurenkamp@xs4all.nl>
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To: Mark Hurenkamp <mark.hurenkamp@xs4all.nl>
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On Sat, Apr 17, 2010 at 02:38:31AM +0200, Mark Hurenkamp wrote:
> > > Anyhow, what I would like you test is to provide 'noirqdebug' flag =
on
> > > your Linux kernel command line. That should take care of the 'nobod=
y
> > > cared IRQ'. Please test and see if you your machine is more or less
> > > sluggish.
> I have had my system up and running for several days now, and indeed
> the IRQ nobody cared has not occured. I do not see my system behave
> any more sluggish than before. All the scheduled recordings seem to hav=
e
> been recorded correctly (sometimes up to 3 in parallel).

Excellent. Then the patch I am working on will make your machine work
fine.
>=20
> > > Also, please do run this:
> > > while (true)
> > > do
> > > sleep 10
> > > cat /proc/interrupts | grep 16
> > > done
> > >
> > > during the lifecycle of the whole machine. I am curious to see whet=
her
> > > you also get an IRQ storm (or if it is just a trickle - which is OK=
)
> > > after launching the DomU guest.
> Having done so, i notice that the count in dom0 and domU is identical,
> and seems to increase with about ~100 or so per second while domU is
> recording from /dev/video0. To me that does not seem unusual.
>=20
>=20
> Probably unrelated, but although i do have compiz running, and quite so=
me eye-
> candy enabled in my dom0 Kde environement, the radeon driver still does=
n't=20
> seem to generate any interupts.=20
>=20
>=20
> And probably also unrelated, dmesg in the domU shows a lot of these mes=
sages:



Ugh. No idea.

> xennet: skb rides the rocket: 20 frags                                 =
                                                                         =
                             =20
> Pid: 0, comm: swapper Not tainted 2.6.32mh25 #6                        =
                                                                         =
                             =20
> Call Trace:                                                            =
                                                                         =
                             =20
>  <IRQ>  [<ffffffffa00b941a>] xennet_start_xmit+0x7d/0x680 [xen_netfront=
]                                                                        =
                             =20
>  [<ffffffff8100eb49>] ? xen_force_evtchn_callback+0xd/0xf              =
                                                                         =
                             =20
>  [<ffffffff8100f442>] ? check_events+0x12/0x20                         =
                                                                         =
                             =20
>  [<ffffffff8108fd61>] ? lock_acquired+0x255/0x264                      =
                                                                         =
                             =20
>  [<ffffffff813dcc11>] dev_hard_start_xmit+0x23b/0x2e6                  =
                                                                         =
                             =20
>  [<ffffffff813efcd3>] sch_direct_xmit+0x6a/0x178                       =
                                                                         =
                             =20
>  [<ffffffff813dd04d>] dev_queue_xmit+0x279/0x3e2                       =
                                                                         =
                             =20
>  [<ffffffff813dcf3d>] ? dev_queue_xmit+0x169/0x3e2                     =
                                                                         =
                             =20
>  [<ffffffff813faaf2>] ? rcu_read_unlock+0x2b/0x46                      =
                                                                         =
                             =20
>  [<ffffffff813fad61>] ? nf_hook_slow+0xcf/0xe0                         =
                                                                         =
                             =20
>  [<ffffffff8140f222>] ? ip_finish_output+0x0/0x71                      =
                                                                         =
                             =20
>  [<ffffffff8140e1b0>] ip_finish_output2+0x238/0x281                    =
                                                                         =
                             =20
>  [<ffffffff8140f291>] ip_finish_output+0x6f/0x71                       =
                                                                         =
                             =20
>  [<ffffffff8140f35f>] ip_output+0xcc/0xd5                              =
                                                                         =
                             =20
>  [<ffffffff8140d894>] dst_output+0x10/0x12                             =
                                                                         =
                             =20
>  [<ffffffff8140de17>] ip_local_out+0x23/0x27                           =
                                                                         =
                             =20
>  [<ffffffff8140e507>] ip_queue_xmit+0x30e/0x3a4                        =
                                                                         =
                             =20
>  [<ffffffff8100eb49>] ? xen_force_evtchn_callback+0xd/0xf              =
                                                                         =
                             =20
>  [<ffffffff8100f442>] ? check_events+0x12/0x20                         =
                                                                         =
                             =20
>  [<ffffffff81421e1a>] tcp_transmit_skb+0x672/0x6b0                     =
                                                                         =
                             =20
>  [<ffffffff8108d003>] ? mark_lock+0x27/0x21e                           =
                                                                         =
                             =20
>  [<ffffffff81423a01>] tcp_write_xmit+0x7cd/0x8bd                       =
                                                                         =
                             =20
>  [<ffffffff814209ef>] ? tcp_established_options+0x33/0xae              =
                                                                         =
                             =20
>  [<ffffffff81423b56>] __tcp_push_pending_frames+0x2f/0x5c              =
                                                                         =
                             =20
>  [<ffffffff8141d352>] tcp_data_snd_check+0x29/0xef                     =
                                                                         =
                             =20
>  [<ffffffff8141f6b7>] tcp_rcv_established+0xd2/0x6a9                   =
                                                                         =
                             =20
>  [<ffffffff8100f442>] ? check_events+0x12/0x20                         =
                                                                         =
                             =20
>  [<ffffffff81426dec>] tcp_v4_do_rcv+0x1bf/0x367                        =
                                                                         =
                             =20
>  [<ffffffff814282df>] ? tcp_v4_rcv+0x2b8/0x66d                         =
                                                                         =
                             =20
>  [<ffffffff814282df>] ? tcp_v4_rcv+0x2b8/0x66d                         =
                                                                         =
                             =20
>  [<ffffffff81428482>] tcp_v4_rcv+0x45b/0x66d                           =
                                                                         =
                             =20
>  [<ffffffff8140b6d6>] ip_local_deliver_finish+0x154/0x200              =
                                                                         =
                             =20
>  [<ffffffff8140b7f9>] ip_local_deliver+0x77/0x7e                       =
                                                                         =
                             =20
>  [<ffffffff8140b120>] ip_rcv_finish+0x3a9/0x3d5                        =
                                                                         =
                             =20
>  [<ffffffff8140b3d5>] ip_rcv+0x289/0x2c9                               =
                                                                         =
                             =20
>  [<ffffffff813dbd72>] netif_receive_skb+0x415/0x43f                    =
                                                                         =
                             =20
>  [<ffffffffa00ba56d>] xennet_poll+0xaf9/0xca4 [xen_netfront]           =
                                                                         =
                             =20
>  [<ffffffff813dc546>] net_rx_action+0xc8/0x21a                         =
                                                                         =
                             =20
>  [<ffffffff81062f24>] __do_softirq+0x11c/0x1fd                         =
                                                                         =
                             =20
>  [<ffffffff8124dd9b>] ? _raw_spin_unlock+0x8f/0x98                     =
                                                                         =
                             =20
>  [<ffffffff81013f9c>] call_softirq+0x1c/0x30                           =
                                                                         =
                             =20
>  [<ffffffff81015523>] do_softirq+0x4b/0xa6                             =
                                                                         =
                             =20
>  [<ffffffff8106299b>] irq_exit+0x4a/0x99                               =
                                                                         =
                             =20
>  [<ffffffff812c08dd>] xen_evtchn_do_upcall+0x1af/0x1ec                 =
                                                                         =
                             =20
>  [<ffffffff81013fee>] xen_do_hypervisor_callback+0x1e/0x30             =
                                                                         =
                             =20
>  <EOI>  [<ffffffff810093aa>] ? hypercall_page+0x3aa/0x100b             =
                                                                         =
                             =20
>  [<ffffffff810093aa>] ? hypercall_page+0x3aa/0x100b                    =
                                                                         =
                             =20
>  [<ffffffff8100eb7c>] ? xen_safe_halt+0x10/0x1a                        =
                                                                         =
                             =20
>  [<ffffffff8100c141>] ? xen_idle+0x51/0x5c                             =
                                                                         =
                             =20
>  [<ffffffff81011d14>] ? cpu_idle+0xb0/0x107                            =
                                                                         =
                             =20
>  [<ffffffff814678eb>] ? rest_init+0x7f/0x81                            =
                                                                         =
                             =20
>  [<ffffffff81986d76>] ? start_kernel+0x417/0x422                       =
                                                                         =
                             =20
>  [<ffffffff819862c1>] ? x86_64_start_reservations+0xac/0xb0            =
                                                                         =
                             =20
>  [<ffffffff81989f01>] ? xen_start_kernel+0x648/0x64f
>=20
> And dmesg in dom0 (seems related to a chrome crash):

This is not good. Can you describe how to reproduce this.



> FIX bio-0: Marking all objects used
> chrome[12644]: segfault at 7f6cc3b5ad0c ip 0000000000c10c47 sp 00007fff=
88da2a80=20
> error 4 in chrome[400000+262f000]
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D                                   =20
> BUG bio-0: Poison overwritten                                          =
                                         =20
> -----------------------------------------------------------------------=
------                                   =20
>=20
> INFO: 0xffff88002fcfe58b-0xffff88002fcfe58b. First byte 0xeb instead of=
 0x6b
> INFO: Allocated in mempool_alloc_slab+0x15/0x17 age=3D611 cpu=3D0 pid=3D=
10074    =20
> INFO: Freed in mempool_free_slab+0x17/0x19 age=3D609 cpu=3D0 pid=3D0   =
          =20
> INFO: Slab 0xffffea000136c730 objects=3D32 used=3D31 fp=3D0xffff88002fc=
fe500=20
> flags=3D0x200000000040c3
> INFO: Object 0xffff88002fcfe500 @offset=3D1280 fp=3D0x(null)           =
                         =20
>=20
> Bytes b4 0xffff88002fcfe4f0:  5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a=
 5a 5a=20
> ZZZZZZZZZZZZZZZZ
>   Object 0xffff88002fcfe500:  6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b=
 6b 6b=20
> kkkkkkkkkkkkkkkk
>   Object 0xffff88002fcfe510:  6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b=
 6b 6b=20
> kkkkkkkkkkkkkkkk
>   Object 0xffff88002fcfe520:  6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b=
 6b 6b=20
> kkkkkkkkkkkkkkkk
>   Object 0xffff88002fcfe530:  6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b=
 6b 6b=20
> kkkkkkkkkkkkkkkk
>   Object 0xffff88002fcfe540:  6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b=
 6b 6b=20
> kkkkkkkkkkkkkkkk
>   Object 0xffff88002fcfe550:  6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b=
 6b 6b > kkkkkkkkkkkkkkkk
>   Object 0xffff88002fcfe560:  6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b=
 6b 6b=20
> kkkkkkkkkkkkkkkk
>   Object 0xffff88002fcfe570:  6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b=
 6b 6b=20
> kkkkkkkkkkkkkkkk
>   Object 0xffff88002fcfe580:  6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b eb 6b 6b=
 6b 6b=20
> kkkkkkkkkkk=EBkkkk
>   Object 0xffff88002fcfe590:  6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b=
 6b 6b=20
> kkkkkkkkkkkkkkkk
>   Object 0xffff88002fcfe5a0:  6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b=
 6b a5=20
> kkkkkkkkkkkkkkk=A5
>  Redzone 0xffff88002fcfe5b0:  bb bb bb bb bb bb bb bb                  =
      =20
> =BB=BB=BB=BB=BB=BB=BB=BB       =20
>  Padding 0xffff88002fcfe5f0:  5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a=
 5a 5a=20
> ZZZZZZZZZZZZZZZZ
> Pid: 914, comm: kjournald Tainted: G    B   W  2.6.32mh25 #6           =
                      =20
> Call Trace:
>  [<ffffffff8111aaf8>] print_trailer+0x140/0x149
>  [<ffffffff8111b024>] check_bytes_and_report+0xba/0xeb
>  [<ffffffff8111b11f>] check_object+0xca/0x1ae
>  [<ffffffff8111d239>] __slab_alloc+0x3a6/0x454
>  [<ffffffff810e80f6>] ? mempool_alloc_slab+0x15/0x17
>  [<ffffffff810e80f6>] ? mempool_alloc_slab+0x15/0x17
>  [<ffffffff8111d897>] kmem_cache_alloc+0xb4/0x173
>  [<ffffffff810e80f6>] mempool_alloc_slab+0x15/0x17
>  [<ffffffff810e81df>] mempool_alloc+0x6c/0x11e
>  [<ffffffff8100eb49>] ? xen_force_evtchn_callback+0xd/0xf
>  [<ffffffff8100eb49>] ? xen_force_evtchn_callback+0xd/0xf
>  [<ffffffff81155924>] bio_alloc_bioset+0x35/0xc2
>  [<ffffffff811559db>] bio_clone+0x2a/0x7c
>  [<ffffffffa001b9c0>] make_request+0x51b/0x697 [raid1]
>  [<ffffffff813952ec>] md_make_request+0xcf/0x10d
>  [<ffffffff8107ff97>] ? up_read+0x2b/0x2f
>  [<ffffffff81230263>] generic_make_request+0x2ca/0x323
>  [<ffffffff81480738>] ? sub_preempt_count+0x9/0x83
>  [<ffffffff81230389>] submit_bio+0xcd/0xea
>  [<ffffffff81150e27>] submit_bh+0xf4/0x117
>  [<ffffffff811d6f6d>] journal_commit_transaction+0x95b/0xeea
>  [<ffffffff8147dcf0>] ? _spin_unlock_irqrestore+0x70/0x7e
>  [<ffffffff8106be6d>] ? try_to_del_timer_sync+0x73/0x81
>  [<ffffffff8106be7b>] ? del_timer_sync+0x0/0xa6
>  [<ffffffff811da626>] kjournald+0xf0/0x23c
>  [<ffffffff8107c1fa>] ? autoremove_wake_function+0x0/0x39
>  [<ffffffff811da536>] ? kjournald+0x0/0x23c
>  [<ffffffff8107bedc>] kthread+0x7f/0x87
>  [<ffffffff81013e9a>] child_rip+0xa/0x20
>  [<ffffffff810137d4>] ? restore_args+0x0/0x30
>  [<ffffffff8100f442>] ? check_events+0x12/0x20
>  [<ffffffff8100f442>] ? check_events+0x12/0x20
>  [<ffffffff81013e90>] ? child_rip+0x0/0x20
> FIX bio-0: Restoring 0xffff88002fcfe58b-0xffff88002fcfe58b=3D0x6b
>=20
>=20
> Regards,
> Mark.
>=20
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