PCTV 290e page allocation failure

[Andy Furniss <andyqos@ukfsn.org>]

Hi.

I've got an old PIII 256M Ram PC that for years has served as an always 
on TV streamer/recorder and gateway/server box.

It had 2 PCI dvb cards until now I have a PCTV 290e so replaced one card 
with a USB2 PCI card.

At first the PCTV worked OK, but now I've been getting a page allocation 
failure. After this happens I can't use the PVTV until I re-plug it. It 
will then work, but the next day I am likely to get the same.

Free/meminfo (to my untrained eye) seem to show available mem.

mumudvb: page allocation failure: order:4, mode:0x80d0
Pid: 15776, comm: mumudvb Not tainted 3.3.0-rc1 #6
Call Trace:
  [<c102a43b>] ? printk+0x1b/0x20
  [<c107c353>] warn_alloc_failed+0xc3/0x130
  [<c107dab7>] __alloc_pages_nodemask+0x447/0x580
  [<c1006e58>] dma_generic_alloc_coherent+0x68/0xe0
  [<c1255b41>] hcd_buffer_alloc+0x101/0x110
  [<c1006df0>] ? dma_set_mask+0x50/0x50
  [<c1248e35>] usb_alloc_coherent+0x25/0x30
  [<d1dab1cc>] em28xx_init_isoc+0x10c/0x360 [em28xx]
  [<d1dcb0ad>] em28xx_start_feed+0xad/0xe0 [em28xx_dvb]
  [<d1dcca20>] ? em28xx_mt352_terratec_xs_init+0x120/0x120 [em28xx_dvb]
  [<d194438c>] dmx_ts_feed_start_filtering+0x4c/0xd0 [dvb_core]
  [<d1941d3d>] dvb_dmxdev_start_feed+0x9d/0xf0 [dvb_core]
  [<d1942f19>] dvb_dmxdev_filter_start+0x269/0x380 [dvb_core]
  [<d1942341>] ? dvb_dmxdev_add_pid+0x51/0xa0 [dvb_core]
  [<d19432f4>] dvb_demux_do_ioctl+0x164/0x550 [dvb_core]
  [<c10aca65>] ? path_put+0x15/0x20
  [<c10b0584>] ? do_last+0x1e4/0x7d0
  [<c117d497>] ? _copy_from_user+0x37/0x60
  [<d194131f>] dvb_usercopy+0xef/0x1a0 [dvb_core]
  [<c10b0f50>] ? do_filp_open+0x30/0x80
  [<d1941d90>] ? dvb_dmxdev_start_feed+0xf0/0xf0 [dvb_core]
  [<d1941da2>] dvb_demux_ioctl+0x12/0x20 [dvb_core]
  [<d1943190>] ? dvb_demux_release+0x160/0x160 [dvb_core]
  [<c10b2801>] vfs_ioctl+0x31/0x50
  [<c10b2ada>] do_vfs_ioctl+0xaa/0x500
  [<c10acdb3>] ? getname_flags+0xc3/0x130
  [<c10a27c8>] ? fd_install+0x48/0x60
  [<c10a294b>] ? do_sys_open+0x16b/0x1b0
  [<c1020000>] ? handle_vm86_fault+0x160/0x910
  [<c10b2f69>] sys_ioctl+0x39/0x70
  [<c13679d0>] sysenter_do_call+0x12/0x26
Mem-Info:
DMA per-cpu:
CPU    0: hi:    0, btch:   1 usd:   0
Normal per-cpu:
CPU    0: hi:   90, btch:  15 usd:   0
active_anon:806 inactive_anon:10372 isolated_anon:0
  active_file:21713 inactive_file:22283 isolated_file:0
  unevictable:0 dirty:45 writeback:0 unstable:0
  free:994 slab_reclaimable:2584 slab_unreclaimable:1960
  mapped:1002 shmem:12 pagetables:409 bounce:0
DMA free:1100kB min:124kB low:152kB high:184kB active_anon:52kB 
inactive_anon:72kB active_file:6008kB inactive_file:8136kB 
unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15808kB 
mlocked:0kB dirty:4kB writeback:0kB mapped:12kB shmem:0kB 
slab_reclaimable:436kB slab_unreclaimable:16kB kernel_stack:24kB 
pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 
all_unreclaimable? no
lowmem_reserve[]: 0 237 237
Normal free:2756kB min:1904kB low:2380kB high:2856kB active_anon:3172kB 
inactive_anon:41416kB active_file:80844kB inactive_file:80996kB 
unevictable:0kB isolated(anon):0kB isolated(file):0kB present:242824kB 
mlocked:0kB dirty:176kB writeback:0kB mapped:3996kB shmem:48kB 
slab_reclaimable:9900kB slab_unreclaimable:7824kB kernel_stack:1904kB 
pagetables:1636kB unstable:0kB bounce:0kB writeback_tmp:0kB 
pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0
DMA: 277*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 
0*2048kB 0*4096kB = 1108kB
Normal: 233*4kB 202*8kB 5*16kB 0*32kB 2*64kB 0*128kB 0*256kB 0*512kB 
0*1024kB 0*2048kB 0*4096kB = 2756kB
44485 total pagecache pages
476 pages in swap cache
Swap cache stats: add 1563, delete 1087, find 1624/1719
Free swap  = 485904kB
Total swap = 488340kB
65264 pages RAM
1946 pages reserved
49870 pages shared
36872 pages non-shared
unable to allocate 60160 bytes for transfer buffer 0