X600 driver instability?

[Jon Masters]

On Tue, 2008-10-14 at 01:20 -0400, Jon Masters wrote:
> On Tue, 2008-10-14 at 15:09 +1000, Dave Airlie wrote:

> > If its the kernel it must be something I've upstreamed.
> 
> Yeah, I'll start with the X driver itself. Hopefully it's just something
> in there that's changed to cause my recent woes.

Of course, I say this and then shortly thereafter Xorg starts chewing
100% CPU and becomes completely wedged. So I login remotely and kill it,
which then results in this nice little oops from the radeon driver. I've
no time to look at the moment and I need to keep this box more or less
running, but stability seems to have gone completely down the pan :(

BUG: unable to handle kernel NULL pointer dereference at
0000000000000000
IP: [<ffffffffa03728a8>] :radeon:radeon_do_cp_idle+0x169/0x1af
PGD 11ac1067 PUD e67b067 PMD e687067 PTE 0
Oops: 0000 [1] SMP 
CPU 0 
Modules linked in: nls_utf8 tun vfat fat ipt_MASQUERADE iptable_nat
nf_nat nf_conntrack_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp
iptable_filter ip_tables x_tables nfsd lockd nfs_acl auth_rpcgss
exportfs bridge bnep rfcomm l2cap bluetooth ib_iser rdma_cm ib_cm iw_cm
ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi scsi_transport_iscsi
fuse sunrpc cpufreq_ondemand powernow_k8 freq_table dm_multipath radeon
drm ipv6 kvm_amd kvm ppdev sr_mod cdrom snd_hda_intel snd_seq_dummy
snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss
snd_mixer_oss parport_pc parport pcspkr serio_raw floppy snd_pcm k8temp
hwmon r8169 snd_timer firewire_ohci sg firewire_core snd_page_alloc
snd_hwdep pata_amd crc_itu_t snd soundcore usb_storage usblp i2c_nforce2
i2c_core dm_snapshot dm_zero dm_mirror dm_log dm_mod ata_generic
pata_acpi sata_nv libata sd_mod scsi_mod raid456 async_xor async_memcpy
async_tx xor raid1 ext3 jbd mbcache uhci_hcd ohci_hcd ehci_hcd [last
unloaded: scsi_wait_scan]
Pid: 4102, comm: Xorg Not tainted 2.6.26.5-45.fc9.x86_64 #1
RIP: 0010:[<ffffffffa03728a8>]
[<ffffffffa03728a8>] :radeon:radeon_do_cp_idle+0x169/0x1af
RSP: 0018:ffff81006d419b18  EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff81007c151000 RCX: 0000000000026989
RDX: 0000000000026989 RSI: 000000000003ffff RDI: ffff81007c151000
RBP: ffff81006d419b28 R08: ffff81006d418000 R09: 0000000000000000
R10: 0000021906f6f16e R11: 000000007fbebde0 R12: ffff81007da17000
R13: ffff81006780fd80 R14: ffff81006780fdc0 R15: ffff81007da17010
FS:  00007f9763880780(0000) GS:ffffffff81417000(0000)
knlGS:00000000ed0e0b90
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 000000000e64d000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process Xorg (pid: 4102, threadinfo ffff81006d418000, task
ffff81006413c3e0)
Stack:  ffff81006780fdc0 ffff81007c151000 ffff81006d419b48
ffffffffa037353b
 ffff81007da1700c ffff81007da17000 ffff81006d419b58 ffffffffa037cfc9
 ffff81006d419b98 ffffffffa0345c96 ffff81006d419b98 ffff81007da1700c
Call Trace:
 [<ffffffffa037353b>] :radeon:radeon_do_release+0x4f/0x12a
 [<ffffffffa037cfc9>] :radeon:radeon_driver_lastclose+0x9/0xb
 [<ffffffffa0345c96>] :drm:drm_lastclose+0x61/0x2ce
 [<ffffffffa03465a3>] :drm:drm_release+0x475/0x492
 [<ffffffff810ad44f>] __fput+0xca/0x189
 [<ffffffff810ad522>] fput+0x14/0x16
 [<ffffffff810aa760>] filp_close+0x66/0x71
 [<ffffffff81038c13>] put_files_struct+0x74/0xc8
 [<ffffffff81038cae>] exit_files+0x47/0x4f
 [<ffffffff8103a505>] do_exit+0x293/0x84c
 [<ffffffff8103ab37>] do_group_exit+0x79/0xa6
 [<ffffffff810437b3>] get_signal_to_deliver+0x2a7/0x2cf
 [<ffffffff8100b363>] do_notify_resume+0x90/0x90c
 [<ffffffff8104cf3b>] ? ktime_get_ts+0x49/0x4e
 [<ffffffff8104cf51>] ? ktime_get+0x11/0x42
 [<ffffffff8100a75b>] ? __switch_to+0xf5/0x39a
 [<ffffffff8102a1b4>] ? hrtick_start_fair+0x14a/0x190
 [<ffffffff81071f22>] ? audit_syscall_exit+0x331/0x353
 [<ffffffff8100c367>] int_signal+0x12/0x17


Code: a0 48 c7 c7 b3 53 38 a0 31 c0 e8 1b 7c f2 e0 eb 03 89 53 28 0f ae
f0 83 bb 88 00 00 00 00 74 0f 48 8b 83 20 01 00 00 48 8b 40 18 <8b> 00
eb 11 48 8b 83 00 04 00 00 48 8b 40 18 8b 80 10 07 00 00 
RIP  [<ffffffffa03728a8>] :radeon:radeon_do_cp_idle+0x169/0x1af
 RSP <ffff81006d419b18>
CR2: 0000000000000000
---[ end trace 8fe985cc75ef9958 ]---
Fixing recursive fault but reboot is needed!

Jon.