[meta-freescale] Wandboard Quad experience (good!)

[Chris Tapp]

Hi John,

On 14 Jul 2013, at 20:38, John Weber wrote:

> Hi Chris,
> 
> Thanks.  You've probably noticed, but this is a different error from the first one you sent.  The first one was in the Vivante driver.

Yes, I had spotted it was different...

> 
> This one seems related to a memory limitation and perhaps related to the CONFIG_SWAP being on by default in the kernel build.  Since there is no swap partition, having CONFIG_SWAP seems a little useless.  Oddly enough, all of the default i.MX6 defconfigs set CONFIG_SWAP.  I'm seeing if we can remove that option.

but I had no idea it was related to swap ;-) I'll disable locally and see if that makes a difference. I can't see why swap should be getting used as the app never uses anywhere near the 2GB the board has, but I've see linux hit swap when there still seems to be plenty of physical memory about, so this may be expected.

It is just possible that this may be related to the other issue, as I can imagine a gstreamer-heavy app does a lot of memory allocation/deallocation...

> John
> 
> On 7/13/13 4:26 PM, Chris Tapp wrote:
>> Hi John,
>> 
>> On 13 Jul 2013, at 01:07, John Weber wrote:
>> 
>>> Chris,
>>> 
>>> This looks like it is coming from the Vivante GPU driver in:
>>> drivers/mxc/gpu-viv/hal/kernel/gc_hal_kernel.c, line 1315.
>>> 
>>> How would I replicate this problem?
>> 
>> Good question! Simply running (with GST_DEBUG="*:2")
>> 
>> gst-launch playbin2 uri=http://media.w3.org/2010/05/sintel/trailer.webm video-sink="queue2 ! mfw_v4lsink"
>> 
>> sometimes gives this:
>> 
>> [ 2445.396718] source:src: page allocation failure: order:11, mode:0xd1
>> [ 2445.403170] Backtrace:
>> [ 2445.405710] [<c003e358>] (dump_backtrace+0x0/0x104) from [<c0421760>] (dump_stack+0x18/0x1c)
>> [ 2445.414222]  r6:e9b80000 r5:000000d1 r4:00000001 r3:00000000
>> [ 2445.420029] [<c0421748>] (dump_stack+0x0/0x1c) from [<c00b7be8>] (warn_alloc_failed+0xe4/0x104)
>> [ 2445.428825] [<c00b7b04>] (warn_alloc_failed+0x0/0x104) from [<c00ba12c>] (__alloc_pages_nodemask+0x5b8/0x634)
>> [ 2445.438806]  r3:00000000 r2:00000000
>> [ 2445.442482]  r8:00000000 r7:00000000 r6:e9b80000 r5:0000000b r4:000000d1
>> [ 2445.449342] [<c00b9b74>] (__alloc_pages_nodemask+0x0/0x634) from [<c004400c>] (__dma_alloc+0xc4/0x2b0)
>> [ 2445.458728] [<c0043f48>] (__dma_alloc+0x0/0x2b0) from [<c0044550>] (dma_alloc_coherent+0x5c/0x68)
>> [ 2445.467695] [<c00444f4>] (dma_alloc_coherent+0x0/0x68) from [<c02f693c>] (vpu_alloc_dma_buffer+0x34/0x5c)
>> [ 2445.477323]  r7:e9b80000 r6:e9cb6f28 r5:e9cb6f20 r4:e9cb6f28
>> [ 2445.483422] [<c02f6908>] (vpu_alloc_dma_buffer+0x0/0x5c) from [<c02f6a38>] (vpu_ioctl+0xd4/0x7ac)
>> [ 2445.492366]  r4:41efe940 r3:00000000
>> [ 2445.496042] [<c02f6964>] (vpu_ioctl+0x0/0x7ac) from [<c00f144c>] (vfs_ioctl+0x28/0x44)
>> [ 2445.504025]  r8:e9b468d0 r7:00000007 r6:00005600 r5:e9b667a0 r4:e9b667a0
>> [ 2445.510888] [<c00f1424>] (vfs_ioctl+0x0/0x44) from [<c00f1e78>] (do_vfs_ioctl+0x414/0x508)
>> [ 2445.519167] [<c00f1a64>] (do_vfs_ioctl+0x0/0x508) from [<c00f1fa8>] (sys_ioctl+0x3c/0x68)
>> [ 2445.527381] [<c00f1f6c>] (sys_ioctl+0x0/0x68) from [<c003ac00>] (ret_fast_syscall+0x0/0x30)
>> [ 2445.535753]  r7:00000036 r6:415c11ac r5:420762a8 r4:41efe940
>> [ 2445.541491] Mem-info:
>> [ 2445.543770] DMA per-cpu:
>> [ 2445.546309] CPU    0: hi:   90, btch:  15 usd:  84
>> [ 2445.551119] CPU    1: hi:   90, btch:  15 usd:  84
>> [ 2445.555918] CPU    2: hi:   90, btch:  15 usd:   0
>> [ 2445.560733] CPU    3: hi:   90, btch:  15 usd:  98
>> [ 2445.565529] Normal per-cpu:
>> [ 2445.568330] CPU    0: hi:   90, btch:  15 usd:  80
>> [ 2445.573146] CPU    1: hi:   90, btch:  15 usd:  66
>> [ 2445.577944] CPU    2: hi:   90, btch:  15 usd:  77
>> [ 2445.582757] CPU    3: hi:   90, btch:  15 usd:  19
>> [ 2445.587553] HighMem per-cpu:
>> [ 2445.590455] CPU    0: hi:  186, btch:  31 usd:  16
>> [ 2445.595254] CPU    1: hi:  186, btch:  31 usd:  37
>> [ 2445.600052] CPU    2: hi:  186, btch:  31 usd: 172
>> [ 2445.604863] CPU    3: hi:  186, btch:  31 usd: 181
>> [ 2445.609675] active_anon:1321 inactive_anon:19 isolated_anon:0
>> [ 2445.609680]  active_file:2311 inactive_file:2276 isolated_file:0
>> [ 2445.609686]  unevictable:0 dirty:1 writeback:0 unstable:0
>> [ 2445.609690]  free:456985 slab_reclaimable:305 slab_unreclaimable:1705
>> [ 2445.609696]  mapped:1837 shmem:43 pagetables:153 bounce:0
>> [ 2445.638709] DMA free:48392kB min:1052kB low:1312kB high:1576kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:186944kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes
>> [ 2445.675225] lowmem_reserve[]: 0 308 1673 1673
>> [ 2445.679676] Normal free:392244kB min:1776kB low:2220kB high:2664kB active_anon:0kB inactive_anon:0kB active_file:2036kB inactive_file:1676kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:315584kB mlocked:0kB dirty:4kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:1220kB slab_unreclaimable:6820kB kernel_stack:656kB pagetables:612kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
>> [ 2445.717837] lowmem_reserve[]: 0 0 10922 10922
>> [ 2445.722299] HighMem free:1387304kB min:512kB low:2480kB high:4448kB active_anon:5284kB inactive_anon:76kB active_file:7208kB inactive_file:7428kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:1398016kB mlocked:0kB dirty:0kB writeback:0kB mapped:7348kB shmem:172kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
>> [ 2445.760550] lowmem_reserve[]: 0 0 0 0
>> [ 2445.764287] DMA: 10*4kB 12*8kB 14*16kB 13*32kB 12*64kB 12*128kB 7*256kB 3*512kB 5*1024kB 6*2048kB 6*4096kB 0*8192kB 0*16384kB 0*32768kB = 48392kB
>> [ 2445.777566] Normal: 99*4kB 71*8kB 41*16kB 9*32kB 5*64kB 3*128kB 2*256kB 2*512kB 1*1024kB 1*2048kB 2*4096kB 4*8192kB 3*16384kB 9*32768kB = 392244kB
>> [ 2445.790945] HighMem: 400*4kB 205*8kB 114*16kB 131*32kB 62*64kB 29*128kB 13*256kB 2*512kB 4*1024kB 1*2048kB 2*4096kB 1*8192kB 2*16384kB 40*32768kB = 1387304kB
>> [ 2445.805269] 4614 total pagecache pages
>> [ 2445.809023] 0 pages in swap cache
>> [ 2445.812355] Swap cache stats: add 0, delete 0, find 0/0
>> [ 2445.817586] Free swap  = 0kB
>> [ 2445.820483] Total swap = 0kB
>> [ 2445.870417] 524288 pages of RAM
>> [ 2445.873566] 458040 free pages
>> [ 2445.876537] 50744 reserved pages
>> [ 2445.879767] 2012 slab pages
>> [ 2445.882584] 5157 pages shared
>> [ 2445.885557] 0 pages swap cached
>> [ 2445.888705] Physical memory allocation error!
>> [ 2445.893083] Physical memory allocation error!
>> 
>> I'll have a go at getting the other one to show...
>> 
>> Chris Tapp
>> 
>> opensource at keylevel.com
>> www.keylevel.com
>> 
>> 
>> 

Chris Tapp

opensource at keylevel.com
www.keylevel.com