Re: [Xen-devel] [GIT PULL] devel/pat + devel/kms.fixes-0.5 / dma-api check_unmap() warning

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Sun, Aug 15, 2010 at 11:41:25PM +0300, Pasi Kärkkäinen wrote:
> On Fri, Aug 06, 2010 at 10:06:09AM -0400, Konrad Rzeszutek Wilk wrote:
> > 
> > Some of them are marked as not for upstream consumption, while some of
> > the other are OK (and Daniel's is upstream). Those patches from both
> > branches make it possible to have Xorg working with the following
> > graphics cards on the PVOPS kernel:
> > 
> > RIVA TNT2 Pro
> > GeForce 1 256
> > GeForce 4 Ti 4200
> > GeForce 6150
> > GeForce 6200
> > GeForce 7300
> > GeForce 8600 GT
> > Radeon R100 QD (7200)
> > Radeon RV100QY (7000)
> > Radeon HD 3200
> > Radeon HD 3450
> > Radeon RV710 [Radeon HD 4350]
> > Radeon ES1000
> > ICH5 82865G
> > ICH7 82G33/G31G
> > ICH8 82Q963/Q965
> > Matrox G450
> > XGI Z7/Z9 (XG20 core)
> > 
> > Testing was carried out using Fedora Core 13, Fedora Core 11, and Ubuntu
> > Lucid 10.04 with the PVOPS kernel.
> > 
> > The details are located at http://wiki.xensource.com/xenwiki/XenPVOPSDRM 
> > For the NVidia cards I backported the 2.6.34 nouvoua driver in 2.6.32
> > and used that - it is pretty stable and even the experimental Gallium
> > drivers (3D) work well.
> > 
> 
> Hello,
> 
> I just tried the latest 2.6.32.19 kernel from xen/stable-2.6.32.x branch,
> which now includes the kms.fixes-0.5, on my radeon/supermicro testbox.
> 
> .. And KMS modesetting works properly now in Xen dom0! 
> My onboard ATI Radeon is the following:
> 
> # lspci -v | grep VGA
> 11:04.0 VGA compatible controller: ATI Technologies Inc ES1000 (rev 02) 
> (prog-if 00 [VGA controller])
> 
> It seems also X starts OK, and I can use the Gnome desktop. 
> I could even run multiple OpenGL 3D applications! (ok, glxgears :)
> 
> Thanks, great work!
> 

Hmm, actually it seems I got this in dom0 dmesg:

------------[ cut here ]------------
WARNING: at lib/dma-debug.c:802 check_unmap+0x18f/0x615()
Hardware name: X7SB4/E
NULL NULL: DMA-API: device driver tries to free DMA memory it has not allocated 
[device address=0x000000002eecc000] [size=4096 bytes]
Modules linked in: ipt_MASQUERADE iptable_nat nf_nat bridge stp llc sunrpc 
ip6t_REJECT nf_conntrack_ipv6 ip6table_filter ip6_tables ipv6 xen_gntdev 
xen_evtchn xenfs uinput e1000e shpchp iTCO_wdt serio_raw i2c_i801 
iTCO_vendor_support joydev pcspkr floppy usb_storage video aic79xx output 
scsi_transport_spi radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core [last 
unloaded: scsi_wait_scan]
Pid: 15, comm: events/0 Not tainted 2.6.32.19 #1
Call Trace:
 [<ffffffff81059e05>] warn_slowpath_common+0x7c/0x94
 [<ffffffff81059e74>] warn_slowpath_fmt+0x41/0x43
 [<ffffffff8124d6d5>] ? check_unmap+0x100/0x615
 [<ffffffff8124a7ab>] ? xen_virt_to_bus+0x11/0x13
 [<ffffffff8124d764>] check_unmap+0x18f/0x615
 [<ffffffff8100eca1>] ? xen_force_evtchn_callback+0xd/0xf
 [<ffffffff8100f3d2>] ? check_events+0x12/0x20
 [<ffffffff8124dc56>] debug_dma_free_coherent+0x6c/0x7a
 [<ffffffffa00411d3>] ttm_tt_free_alloced_pages+0x129/0x180 [ttm]
 [<ffffffffa00415fd>] ttm_tt_destroy+0x4d/0x8f [ttm]
 [<ffffffffa0041c00>] ttm_bo_release_list+0x96/0xd5 [ttm]
 [<ffffffffa0041b6a>] ? ttm_bo_release_list+0x0/0xd5 [ttm]
 [<ffffffff8123cc75>] kref_put+0x43/0x4d
 [<ffffffffa0042c1d>] ttm_bo_delayed_delete+0xad/0x121 [ttm]
 [<ffffffffa0042cb0>] ttm_bo_delayed_workqueue+0x1f/0x34 [ttm]
 [<ffffffff810754a2>] worker_thread+0x257/0x350
 [<ffffffff8107544a>] ? worker_thread+0x1ff/0x350
 [<ffffffffa0042c91>] ? ttm_bo_delayed_workqueue+0x0/0x34 [ttm]
 [<ffffffff81079f26>] ? autoremove_wake_function+0x0/0x39
 [<ffffffff8107524b>] ? worker_thread+0x0/0x350
 [<ffffffff81079c54>] kthread+0x7f/0x87
 [<ffffffff81013dea>] child_rip+0xa/0x20
 [<ffffffff81013750>] ? restore_args+0x0/0x30
 [<ffffffff81013de0>] ? child_rip+0x0/0x20
---[ end trace 84e813abe3a8bd4d ]---
fuse init (API version 7.13)
end_request: I/O error, dev fd0, sector 0
end_request: I/O error, dev fd0, sector 0
DMA-API: debugging out of memory - disabling


The system is up-to-date Fedora 13, with xen/stable-2.6.32.x dom0 kernel.

Not fatal, things still seem to work..


-- Pasi


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