BUG: Bad page state in process swapper pfn:XXXXX

[achandran@mvista.com (Arun Chandran)]

Hi,

I am booting the latest linus tree on altera cyclone5 soc development kit.
(https://www.altera.com/products/boards_and_kits/dev-kits/altera/kit-cyclone-v-soc.html)
With the dtb file arch/arm/boot/dts/socfpga_cyclone5_socdk.dtb.

I get these BUGS (page dumped because: non-NULL mapping) randomly; occurs
around 1 in 5 times during cold boots.

The entire bootlog with 'memblock=debug' is below.

##################
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Linux version 4.1.0 (arun at arun-OptiPlex-9010) (gcc
version 4.9.3 20141031 (prerelease) (Linaro GCC 2014.11) ) #87 SMP Mon
Jun 22 19:47:47 IST 2015
[    0.000000] CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7), cr=10c5387d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
instruction cache
[    0.000000] Machine model: Altera SOCFPGA Cyclone V SoC Development Kit
[    0.000000] memblock_reserve: [0x00000000008280-0x000000009a4b6b]
flags 0x0 arm_memblock_init+0x28/0x194
[    0.000000] memblock_reserve: [0x00000000004000-0x00000000007fff]
flags 0x0 arm_memblock_init+0x148/0x194
[    0.000000] memblock_reserve: [0x00000003ff9000-0x00000003fffc8f]
flags 0x0 early_init_fdt_scan_reserved_mem+0x38/0x8c
[    0.000000] memblock_reserve: [0x00000000000000-0x00000000000fff]
flags 0x0 early_init_fdt_scan_reserved_mem+0x6c/0x8c
[    0.000000] MEMBLOCK configuration:
[    0.000000]  memory size = 0x20000000 reserved size = 0x9a857c
[    0.000000]  memory.cnt  = 0x1
[    0.000000]  memory[0x0]     [0x00000000000000-0x0000001fffffff],
0x20000000 bytes flags: 0x0
[    0.000000]  reserved.cnt  = 0x4
[    0.000000]  reserved[0x0]   [0x00000000000000-0x00000000000fff],
0x1000 bytes flags: 0x0
[    0.000000]  reserved[0x1]   [0x00000000004000-0x00000000007fff],
0x4000 bytes flags: 0x0
[    0.000000]  reserved[0x2]   [0x00000000008280-0x000000009a4b6b],
0x99c8ec bytes flags: 0x0
[    0.000000]  reserved[0x3]   [0x00000003ff9000-0x00000003fffc8f],
0x6c90 bytes flags: 0x0
[    0.000000] Memory policy: Data cache writealloc
[    0.000000] memblock_reserve: [0x0000001fffe000-0x0000001fffffff]
flags 0x0 memblock_alloc_range_nid+0x38/0x4c
[    0.000000] memblock_reserve: [0x0000001fffd000-0x0000001fffdfff]
flags 0x0 memblock_alloc_range_nid+0x38/0x4c
[    0.000000] memblock_reserve: [0x0000001fffcfd8-0x0000001fffcfff]
flags 0x0 memblock_alloc_range_nid+0x38/0x4c
[    0.000000] memblock_reserve: [0x0000001fffb000-0x0000001fffbfff]
flags 0x0 memblock_alloc_range_nid+0x38/0x4c
[    0.000000] memblock_reserve: [0x0000001fffcfb0-0x0000001fffcfd7]
flags 0x0 memblock_alloc_range_nid+0x38/0x4c
[    0.000000] memblock_reserve: [0x0000001fffa000-0x0000001fffafff]
flags 0x0 memblock_alloc_range_nid+0x38/0x4c
[    0.000000] memblock_reserve: [0x0000001fff9000-0x0000001fff9fff]
flags 0x0 memblock_alloc_range_nid+0x38/0x4c
[    0.000000] memblock_reserve: [0x0000001fff8000-0x0000001fff8fff]
flags 0x0 memblock_alloc_range_nid+0x38/0x4c
[    0.000000] On node 0 totalpages: 131072
[    0.000000] memblock_virt_alloc_try_nid_nopanic: 4194304 bytes
align=0x0 nid=0 from=0x0 max_addr=0x0
alloc_node_mem_map.constprop.88+0x68/0x90
[    0.000000] memblock_reserve: [0x0000001fbf8000-0x0000001fff7fff]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] free_area_init_node: node 0, pgdat c097fbc0,
node_mem_map dfbf8000
[    0.000000]   Normal zone: 1024 pages used for memmap
[    0.000000]   Normal zone: 0 pages reserved
[    0.000000]   Normal zone: 131072 pages, LIFO batch:31
[    0.000000] memblock_virt_alloc_try_nid_nopanic: 64 bytes align=0x0
nid=0 from=0x0 max_addr=0x0 free_area_init_node+0x290/0x310
[    0.000000] memblock_reserve: [0x0000001fffcf40-0x0000001fffcf7f]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] memblock_virt_alloc_try_nid_nopanic: 6144 bytes
align=0x0 nid=0 from=0x0 max_addr=0x0 zone_wait_table_init+0x78/0xe4
[    0.000000] memblock_reserve: [0x0000001fbf6800-0x0000001fbf7fff]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] memblock_virt_alloc_try_nid: 28 bytes align=0x0 nid=-1
from=0x0 max_addr=0x0 setup_arch+0x618/0x968
[    0.000000] memblock_reserve: [0x0000001fffcf80-0x0000001fffcf9b]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] memblock_reserve: [0x0000001fbeaa18-0x0000001fbf67ff]
flags 0x0 memblock_alloc_range_nid+0x38/0x4c
[    0.000000] memblock_reserve: [0x0000001fffcf20-0x0000001fffcf3c]
flags 0x0 memblock_alloc_range_nid+0x38/0x4c
[    0.000000] memblock_reserve: [0x0000001fffcf00-0x0000001fffcf1c]
flags 0x0 memblock_alloc_range_nid+0x38/0x4c
[    0.000000] memblock_reserve: [0x0000001fffcee4-0x0000001fffcefe]
flags 0x0 memblock_alloc_range_nid+0x38/0x4c
[    0.000000] memblock_reserve: [0x0000001fffcec8-0x0000001fffcee2]
flags 0x0 memblock_alloc_range_nid+0x38/0x4c
[    0.000000] memblock_reserve: [0x0000001fffceac-0x0000001fffcec5]
flags 0x0 memblock_alloc_range_nid+0x38/0x4c
[    0.000000] memblock_reserve: [0x0000001fffce90-0x0000001fffcea9]
flags 0x0 memblock_alloc_range_nid+0x38/0x4c
[    0.000000] memblock_reserve: [0x0000001fffce74-0x0000001fffce8d]
flags 0x0 memblock_alloc_range_nid+0x38/0x4c
[    0.000000] memblock_reserve: [0x0000001fffce58-0x0000001fffce71]
flags 0x0 memblock_alloc_range_nid+0x38/0x4c
[    0.000000] memblock_virt_alloc_try_nid: 78 bytes align=0x0 nid=-1
from=0x0 max_addr=0x0 start_kernel+0xd0/0x3b0
[    0.000000] memblock_reserve: [0x0000001fffce00-0x0000001fffce4d]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] memblock_virt_alloc_try_nid: 78 bytes align=0x0 nid=-1
from=0x0 max_addr=0x0 start_kernel+0xf4/0x3b0
[    0.000000] memblock_reserve: [0x0000001fffcd80-0x0000001fffcdcd]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] memblock_virt_alloc_try_nid: 78 bytes align=0x0 nid=-1
from=0x0 max_addr=0x0 start_kernel+0x118/0x3b0
[    0.000000] memblock_reserve: [0x0000001fffcd00-0x0000001fffcd4d]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] memblock_virt_alloc_try_nid_nopanic: 4096 bytes
align=0x0 nid=-1 from=0x0 max_addr=0x0 pcpu_alloc_alloc_info+0x4c/0x88
[    0.000000] memblock_reserve: [0x0000001fbe9a00-0x0000001fbea9ff]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] memblock_virt_alloc_try_nid_nopanic: 4096 bytes
align=0x0 nid=-1 from=0x0 max_addr=0x0
pcpu_embed_first_chunk+0x4d8/0x784
[    0.000000] memblock_reserve: [0x0000001fbe8a00-0x0000001fbe99ff]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] memblock_virt_alloc_try_nid_nopanic: 98304 bytes
align=0x1000 nid=-1 from=0x3fffffff max_addr=0x0
pcpu_dfl_fc_alloc+0x24/0x2c
[    0.000000] memblock_reserve: [0x0000001fbd0000-0x0000001fbe7fff]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] __memblock_free_early:
[0x0000001fbdc000-0x0000001fbdbfff] pcpu_embed_first_chunk+0x624/0x784
[    0.000000] __memblock_free_early:
[0x0000001fbe8000-0x0000001fbe7fff] pcpu_embed_first_chunk+0x624/0x784
[    0.000000] PERCPU: Embedded 12 pages/cpu @dfbd0000 s19648 r8192
d21312 u49152
[    0.000000] memblock_virt_alloc_try_nid: 4 bytes align=0x0 nid=-1
from=0x0 max_addr=0x0 pcpu_setup_first_chunk+0x324/0x9fc
[    0.000000] memblock_reserve: [0x0000001fffccc0-0x0000001fffccc3]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] memblock_virt_alloc_try_nid: 4 bytes align=0x0 nid=-1
from=0x0 max_addr=0x0 pcpu_setup_first_chunk+0x344/0x9fc
[    0.000000] memblock_reserve: [0x0000001fffcc80-0x0000001fffcc83]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] memblock_virt_alloc_try_nid: 8 bytes align=0x0 nid=-1
from=0x0 max_addr=0x0 pcpu_setup_first_chunk+0x364/0x9fc
[    0.000000] memblock_reserve: [0x0000001fffcc40-0x0000001fffcc47]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] memblock_virt_alloc_try_nid: 8 bytes align=0x0 nid=-1
from=0x0 max_addr=0x0 pcpu_setup_first_chunk+0x384/0x9fc
[    0.000000] memblock_reserve: [0x0000001fffcc00-0x0000001fffcc07]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] pcpu-alloc: s19648 r8192 d21312 u49152 alloc=12*4096
[    0.000000] pcpu-alloc: [0] 0 [0] 1
[    0.000000] memblock_virt_alloc_try_nid: 120 bytes align=0x0 nid=-1
from=0x0 max_addr=0x0 pcpu_setup_first_chunk+0x760/0x9fc
[    0.000000] memblock_reserve: [0x0000001fffcb80-0x0000001fffcbf7]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] memblock_virt_alloc_try_nid: 68 bytes align=0x0 nid=-1
from=0x0 max_addr=0x0 pcpu_setup_first_chunk+0x7a8/0x9fc
[    0.000000] memblock_reserve: [0x0000001fffcb00-0x0000001fffcb43]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] memblock_virt_alloc_try_nid: 68 bytes align=0x0 nid=-1
from=0x0 max_addr=0x0 pcpu_setup_first_chunk+0x8ec/0x9fc
[    0.000000] memblock_reserve: [0x0000001fffca80-0x0000001fffcac3]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] __memblock_free_early:
[0x0000001fbe9a00-0x0000001fbea9ff] pcpu_embed_first_chunk+0x754/0x784
[    0.000000] __memblock_free_early:
[0x0000001fbe8a00-0x0000001fbe99ff] pcpu_embed_first_chunk+0x76c/0x784
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.
Total pages: 130048
[    0.000000] Kernel command line: root= rw console=ttyS0,115200
earlyprintk debug log_buf_len=1M memblock=debug
[    0.000000] memblock_virt_alloc_try_nid_nopanic: 1048576 bytes
align=0x4 nid=-1 from=0x0 max_addr=0x0 setup_log_buf+0x110/0x1d0
[    0.000000] memblock_reserve: [0x0000001fad0000-0x0000001fbcffff]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] log_buf_len: 1048576 bytes
[    0.000000] early log buf free: 7100(43%)
[    0.000000] memblock_virt_alloc_try_nid_nopanic: 8192 bytes
align=0x0 nid=-1 from=0x0 max_addr=0x0
alloc_large_system_hash+0x14c/0x254
[    0.000000] memblock_reserve: [0x0000001fbe8a00-0x0000001fbea9ff]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes)
[    0.000000] memblock_virt_alloc_try_nid_nopanic: 262144 bytes
align=0x0 nid=-1 from=0x0 max_addr=0x0
alloc_large_system_hash+0x14c/0x254
[    0.000000] memblock_reserve: [0x0000001fa90000-0x0000001facffff]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
[    0.000000] memblock_virt_alloc_try_nid_nopanic: 131072 bytes
align=0x0 nid=-1 from=0x0 max_addr=0x0
alloc_large_system_hash+0x14c/0x254
[    0.000000] memblock_reserve: [0x0000001fa70000-0x0000001fa8ffff]
flags 0x0 memblock_virt_alloc_internal+0x120/0x15c
[    0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
[    0.000000] BUG: Bad page state in process swapper  pfn:1a171
[    0.000000] page:dff3ae20 count:0 mapcount:0 mapping:00400320 index:0x0
[    0.000000] flags: 0x0()
[    0.000000] page dumped because: non-NULL mapping
[    0.000000] Modules linked in:
[    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.1.0 #87
[    0.000000] Hardware name: Altera SOCFPGA
[    0.000000] [<c001630c>] (unwind_backtrace) from [<c0012c74>]
(show_stack+0x10/0x14)
[    0.000000] [<c0012c74>] (show_stack) from [<c0484674>]
(dump_stack+0x88/0x98)
[    0.000000] [<c0484674>] (dump_stack) from [<c00bdf1c>] (bad_page+0xcc/0x11c)
[    0.000000] [<c00bdf1c>] (bad_page) from [<c00be0d0>]
(free_pages_prepare+0x164/0x2ac)
[    0.000000] [<c00be0d0>] (free_pages_prepare) from [<c00bfcb8>]
(__free_pages_ok+0x2c/0x358)
[    0.000000] [<c00bfcb8>] (__free_pages_ok) from [<c060d244>]
(free_all_bootmem+0x100/0x170)
[    0.000000] [<c060d244>] (free_all_bootmem) from [<c05fe034>]
(mem_init+0x104/0x2a0)
[    0.000000] [<c05fe034>] (mem_init) from [<c05f8ac0>]
(start_kernel+0x200/0x3b0)
[    0.000000] [<c05f8ac0>] (start_kernel) from [<0000807c>] (0x807c)
[    0.000000] Disabling lock debugging due to kernel taint
[    0.000000] BUG: Bad page state in process swapper  pfn:1a579
[    0.000000] page:dff42f20 count:0 mapcount:1464651863
mapping:ffffffff index:0xb1f8ffff
[    0.000000] flags: 0x0()
[    0.000000] page dumped because: non-NULL mapping
[    0.000000] Modules linked in:
[    0.000000] CPU: 0 PID: 0 Comm: swapper Tainted: G    B           4.1.0 #87
[    0.000000] Hardware name: Altera SOCFPGA
[    0.000000] [<c001630c>] (unwind_backtrace) from [<c0012c74>]
(show_stack+0x10/0x14)
[    0.000000] [<c0012c74>] (show_stack) from [<c0484674>]
(dump_stack+0x88/0x98)
[    0.000000] [<c0484674>] (dump_stack) from [<c00bdf1c>] (bad_page+0xcc/0x11c)
[    0.000000] [<c00bdf1c>] (bad_page) from [<c00be0d0>]
(free_pages_prepare+0x164/0x2ac)
[    0.000000] [<c00be0d0>] (free_pages_prepare) from [<c00bfcb8>]
(__free_pages_ok+0x2c/0x358)
[    0.000000] [<c00bfcb8>] (__free_pages_ok) from [<c060d244>]
(free_all_bootmem+0x100/0x170)
[    0.000000] [<c060d244>] (free_all_bootmem) from [<c05fe034>]
(mem_init+0x104/0x2a0)
[    0.000000] [<c05fe034>] (mem_init) from [<c05f8ac0>]
(start_kernel+0x200/0x3b0)
[    0.000000] [<c05f8ac0>] (start_kernel) from [<0000807c>] (0x807c)
[    0.000000] BUG: Bad page state in process swapper  pfn:1a57a
[    0.000000] page:dff42f40 count:0 mapcount:36968 mapping:  (null)
index:0xa20a0000
[    0.000000] flags:
0x8367a20a(error|uptodate|arch_1|writeback|tail|swapcache|mappedtodisk|reclaim|mlocked)
[    0.000000] page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set
[    0.000000] bad because of flags:
[    0.000000] flags: 0x212000(writeback|swapcache|mlocked)
[    0.000000] Modules linked in:
[    0.000000] CPU: 0 PID: 0 Comm: swapper Tainted: G    B           4.1.0 #87
[    0.000000] Hardware name: Altera SOCFPGA
[    0.000000] [<c001630c>] (unwind_backtrace) from [<c0012c74>]
(show_stack+0x10/0x14)
[    0.000000] [<c0012c74>] (show_stack) from [<c0484674>]
(dump_stack+0x88/0x98)
[    0.000000] [<c0484674>] (dump_stack) from [<c00bdf1c>] (bad_page+0xcc/0x11c)
[    0.000000] [<c00bdf1c>] (bad_page) from [<c00be0d0>]
(free_pages_prepare+0x164/0x2ac)
[    0.000000] [<c00be0d0>] (free_pages_prepare) from [<c00bfcb8>]
(__free_pages_ok+0x2c/0x358)
[    0.000000] [<c00bfcb8>] (__free_pages_ok) from [<c060d244>]
(free_all_bootmem+0x100/0x170)
[    0.000000] [<c060d244>] (free_all_bootmem) from [<c05fe034>]
(mem_init+0x104/0x2a0)
[    0.000000] [<c05fe034>] (mem_init) from [<c05f8ac0>]
(start_kernel+0x200/0x3b0)
[    0.000000] [<c05f8ac0>] (start_kernel) from [<0000807c>] (0x807c)
[    0.000000] BUG: Bad page state in process swapper  pfn:1a57b
[    0.000000] page:dff42f60 count:0 mapcount:0 mapping:  (null) index:0x0
[    0.000000] flags:
0x70532850(dirty|active|private|writeback|swapcache|mappedtodisk|unevictable)
[    0.000000] page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set
[    0.000000] bad because of flags:
[    0.000000] flags: 0x112840(active|private|writeback|swapcache|unevictable)
[    0.000000] Modules linked in:
[    0.000000] CPU: 0 PID: 0 Comm: swapper Tainted: G    B           4.1.0 #87
[    0.000000] Hardware name: Altera SOCFPGA
[    0.000000] [<c001630c>] (unwind_backtrace) from [<c0012c74>]
(show_stack+0x10/0x14)
[    0.000000] [<c0012c74>] (show_stack) from [<c0484674>]
(dump_stack+0x88/0x98)
[    0.000000] [<c0484674>] (dump_stack) from [<c00bdf1c>] (bad_page+0xcc/0x11c)
[    0.000000] [<c00bdf1c>] (bad_page) from [<c00be0d0>]
(free_pages_prepare+0x164/0x2ac)
[    0.000000] [<c00be0d0>] (free_pages_prepare) from [<c00bfcb8>]
(__free_pages_ok+0x2c/0x358)
[    0.000000] [<c00bfcb8>] (__free_pages_ok) from [<c060d244>]
(free_all_bootmem+0x100/0x170)
[    0.000000] [<c060d244>] (free_all_bootmem) from [<c05fe034>]
(mem_init+0x104/0x2a0)
[    0.000000] [<c05fe034>] (mem_init) from [<c05f8ac0>]
(start_kernel+0x200/0x3b0)
[    0.000000] [<c05f8ac0>] (start_kernel) from [<0000807c>] (0x807c)
[    0.000000] Memory: 500508K/524288K available (4749K kernel code,
283K rwdata, 1328K rodata, 3352K init, 127K bss, 15588K reserved, 0K
cma-reserved)
[    0.000000] Virtual kernel memory layout:
[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
[    0.000000]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
[    0.000000]     vmalloc : 0xe0800000 - 0xff000000   ( 488 MB)
[    0.000000]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB)
[    0.000000]     modules : 0xbf000000 - 0xc0000000   (  16 MB)
[    0.000000]       .text : 0xc0008000 - 0xc05f7804   (6079 kB)
[    0.000000]       .init : 0xc05f8000 - 0xc093e000   (3352 kB)
[    0.000000]       .data : 0xc093e000 - 0xc0984e48   ( 284 kB)
[    0.000000]        .bss : 0xc0984e48 - 0xc09a4b6c   ( 128 kB)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[    0.000000] Hierarchical RCU implementation.
[    0.000000]  Additional per-CPU info printed with stalls.
[    0.000000] NR_IRQS:16 nr_irqs:16 16
[    0.000000] L2C-310 enabling early BRESP for Cortex-A9
[    0.000000] L2C-310 full line of zeros enabled for Cortex-A9
[    0.000000] L2C-310 dynamic clock gating enabled, standby mode enabled
[    0.000000] L2C-310 cache controller enabled, 8 ways, 512 kB
[    0.000000] L2C-310: CACHE_ID 0x410030c9, AUX_CTRL 0x46060001
[    0.000000] clocksource timer1: mask: 0xffffffff max_cycles:
0xffffffff, max_idle_ns: 19112604467 ns
[    0.000006] sched_clock: 32 bits at 100MHz, resolution 10ns, wraps
every 21474836475ns
[    0.000129] Console: colour dummy device 80x30
[    0.000145] Calibrating delay loop... 1836.64 BogoMIPS (lpj=9183232)
[    0.059872] pid_max: default: 32768 minimum: 301
[    0.059950] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.059959] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.060400] CPU: Testing write buffer coherency: ok
[    0.060565] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[    0.060644] Setting up static identity map for 0x8280 - 0x82d8
[    0.119900] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[    0.119957] Brought up 2 CPUs
[    0.119970] SMP: Total of 2 processors activated (3679.84 BogoMIPS).
[    0.119975] CPU: All CPU(s) started in SVC mode.
[    0.120292] devtmpfs: initialized
[    0.123483] VFP support v0.3: implementor 41 architecture 3 part 30
variant 9 rev 4
[    0.123715] clocksource jiffies: mask: 0xffffffff max_cycles:
0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.124781] NET: Registered protocol family 16
[    0.125502] DMA: preallocated 256 KiB pool for atomic coherent allocations
[    0.128999] hw-breakpoint: found 5 (+1 reserved) breakpoint and 1
watchpoint registers.
[    0.129010] hw-breakpoint: maximum watchpoint size is 4 bytes.
[    0.161711] SCSI subsystem initialized
[    0.161968] usbcore: registered new interface driver usbfs
[    0.162027] usbcore: registered new interface driver hub
[    0.162079] usbcore: registered new device driver usb
[    0.162677] pps_core: LinuxPPS API ver. 1 registered
[    0.162686] pps_core: Software ver. 5.3.6 - Copyright 2005-2007
Rodolfo Giometti <giometti@linux.it>
[    0.162714] PTP clock support registered
[    0.163485] Switched to clocksource timer1
[    0.189725] NET: Registered protocol family 2
[    0.190253] TCP established hash table entries: 4096 (order: 2, 16384 bytes)
[    0.190293] TCP bind hash table entries: 4096 (order: 3, 32768 bytes)
[    0.190350] TCP: Hash tables configured (established 4096 bind 4096)
[    0.190403] UDP hash table entries: 256 (order: 1, 8192 bytes)
[    0.190429] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
[    0.190570] NET: Registered protocol family 1
[    0.190869] RPC: Registered named UNIX socket transport module.
[    0.190878] RPC: Registered udp transport module.
[    0.190884] RPC: Registered tcp transport module.
[    0.190889] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    0.209283] futex hash table entries: 512 (order: 3, 32768 bytes)
[    0.218433] ntfs: driver 2.1.32 [Flags: R/W].
[    0.225056] io scheduler noop registered (default)
[    0.228675] Serial: 8250/16550 driver, 2 ports, IRQ sharing disabled
[    0.229522] console [ttyS0] disabled
[    0.229555] ffc02000.serial0: ttyS0 at MMIO 0xffc02000 (irq = 34,
base_baud = 6250000) is a 16550A
[    1.955216] console [ttyS0] enabled
[    1.960676] brd: module loaded
[    1.964207] CAN device driver interface
[    1.968395] stmmac - user ID: 0x10, Synopsys ID: 0x37
[    1.973423]  Ring mode enabled
[    1.976511]  DMA HW capability register supported
[    1.981022]  Enhanced/Alternate descriptors
[    1.985388]  Enabled extended descriptors
[    1.989379]  RX Checksum Offload Engine supported (type 2)
[    1.994853]  TX Checksum insertion supported
[    1.999103]  Enable RX Mitigation via HW Watchdog Timer
[    2.012789] libphy: stmmac: probed
[    2.016212] eth0: PHY ID 00221611 at 4 IRQ POLL (stmmac-0:04) active
[    2.873586] dwc2 ffb40000.usb: DWC OTG Controller
[    2.878294] dwc2 ffb40000.usb: new USB bus registered, assigned bus number 1
[    2.885349] dwc2 ffb40000.usb: irq 36, io mem 0x00000000
[    2.891255] hub 1-0:1.0: USB hub found
[    2.895034] hub 1-0:1.0: 1 port detected
[    2.899521] mousedev: PS/2 mouse device common for all mice
[    2.905297] i2c /dev entries driver
[    2.909298] Synopsys Designware Multimedia Card Interface Driver
[    2.915519] dw_mmc ff704000.dwmmc0: IDMAC supports 32-bit address mode.
[    2.922131] dw_mmc ff704000.dwmmc0: Using PIO mode.
[    2.927007] dw_mmc ff704000.dwmmc0: Version ID is 240a
[    2.932153] dw_mmc ff704000.dwmmc0: DW MMC controller at irq 30, 32
bit host data width, 1024 deep fifo
[    2.941637] dw_mmc ff704000.dwmmc0: Got CD GPIO
[    2.983516] dw_mmc ff704000.dwmmc0: 1 slots initialized
[    2.988968] usbcore: registered new interface driver usbhid
[    2.994546] usbhid: USB HID core driver
[    2.998510] oprofile: no performance counters
[    3.002925] oprofile: using timer interrupt.
[    3.008048] NET: Registered protocol family 10
[    3.013296] sit: IPv6 over IPv4 tunneling driver
[    3.018454] NET: Registered protocol family 17
[    3.022912] NET: Registered protocol family 15
[    3.027368] can: controller area network core (rev 20120528 abi 9)
[    3.033582] NET: Registered protocol family 29
[    3.038012] can: raw protocol (rev 20120528)
[    3.042266] can: broadcast manager protocol (rev 20120528 t)
[    3.047928] can: netlink gateway (rev 20130117) max_hops=1
[    3.053578] 8021q: 802.1Q VLAN Support v1.8
[    3.057860] ThumbEE CPU extension supported.
[    3.062130] Registering SWP/SWPB emulation handler
[    3.069415] ttyS0 - failed to request DMA
[    3.075857] Freeing unused kernel memory: 3352K (c05f8000 - c093e000)
Starting logging: OK
Initializing random number generator... [    3.127024] mmc_host mmc0:
Bus speed (slot 0) = 200000000Hz (slot req 50000000Hz, actual
50000000HZ div = 2)
[    3.138973] mmc0: new high speed SDHC card at address 0007
[    3.144975] mmcblk0: mmc0:0007 SD4GB 3.70 GiB
[    3.147371] random: dd urandom read with 0 bits of entropy available
done.
[    3.157824]  mmcblk0: p1 p2 p3
Starting network...

Welcome to Buildroot
buildroot login: [  276.153516] random: nonblocking pool is initialized
root
# cat /proc/cmdline
root= rw console=ttyS0,115200 earlyprintk debug log_buf_len=1M memblock=debug
########

Has anyone seen the issue?  What could be the problem?

--Arun