BB freezes when running samba and transmission

Kurt · October 5, 2011, 6:18am

Hi all,

I’m trying to use my BB (xM Rev C) with the transmission bittorent daemon and with the samba daemon.
While the board works well if only one of the daemons is runnig, it fails when transmisison is
downloading torrents at the same time when I try to upload load large (>= 1,5 Gig) files (I’ve connected a ISB disk to the BB).

Samba quits the connection and most of the time the board completely freezes without recovering.
All connections including ssh drop and board can only be reacivated by pressing the reset button.

I tried the ubuntu-11.04-r4-minimal-armel demo image as well as various angstrom builds. All show the same behaviour. I also tried different transmission versions up to the latest 2.33 (samba is 3.5.8).

Does anybody have an idea what the problem could be?

Thanks in advance,
Kurt

RobertCNelson · October 5, 2011, 12:32pm

If you can get us a serial log, it would help shine more light on the
actual issue....

As a quick workaround to test, what i think is going on..

Under load it's probably the smsc95xx chipset running out of kernel
memory, bump: 8192 -> 16384 in /etc/sysctl.conf

Regards,

Kurt · October 6, 2011, 7:49am

Hi Robert,

thank your for your fast response.

If you can get us a serial log, it would help shine more light on the
actual issue…

Actually, when the board froze, there wasn’t much to see. However, I found some interesting entries in kern and syslog:

kern.log had a lot these:
Oct 4 14:31:11 omap kernel: [30064.859466] smsc95xx 1-2.1:1.0: eth0: kevent 2 may have been dropped

syslog reported a stack exception:

Oct 5 14:32:51 omap kernel: [ 3647.893157] swapper: page allocation failure: order:3, mode:0x4020
Oct 5 14:32:51 omap kernel: [ 3647.893249] [] (unwind_backtrace+0x0/0xf8) from [] (warn_alloc_failed+0xc4/0x114)
Oct 5 14:32:51 omap kernel: [ 3647.893249] [] (warn_alloc_failed+0xc4/0x114) from [] (__alloc_pages_nodemask+0x4e4/0x72c)
Oct 5 14:32:51 omap kernel: [ 3647.893280] [] (__alloc_pages_nodemask+0x4e4/0x72c) from [] (__get_free_pages+0x10/0x24)
Oct 5 14:32:51 omap kernel: [ 3647.893310] [] (__get_free_pages+0x10/0x24) from [] (kmalloc_order_trace+0x24/0x8c)
Oct 5 14:32:51 omap kernel: [ 3647.893341] [] (kmalloc_order_trace+0x24/0x8c) from [] (__alloc_skb+0x54/0xe0)
Oct 5 14:32:51 omap kernel: [ 3647.893371] [] (__alloc_skb+0x54/0xe0) from [] (rx_submit+0x24/0x1e4)
Oct 5 14:32:51 omap kernel: [ 3647.893371] [] (rx_submit+0x24/0x1e4) from [] (usb_hcd_giveback_urb+0x64/0xf8)
Oct 5 14:32:51 omap kernel: [ 3647.893402] [] (usb_hcd_giveback_urb+0x64/0xf8) from [] (ehci_urb_done+0x9c/0xb0)
Oct 5 14:32:51 omap kernel: [ 3647.893432] [] (ehci_urb_done+0x9c/0xb0) from [] (qh_completions+0x248/0x454)
Oct 5 14:32:51 omap kernel: [ 3647.893463] [] (qh_completions+0x248/0x454) from [] (ehci_work+0xd0/0xa88)
Oct 5 14:32:51 omap kernel: [ 3647.893463] [] (ehci_work+0xd0/0xa88) from [] (ehci_irq+0x27c/0x29c)
Oct 5 14:32:51 omap kernel: [ 3647.893493] [] (ehci_irq+0x27c/0x29c) from [] (usb_hcd_irq+0x34/0x84)
Oct 5 14:32:51 omap kernel: [ 3647.893524] [] (usb_hcd_irq+0x34/0x84) from [] (handle_irq_event_percpu+0x68/0x230)
Oct 5 14:32:51 omap kernel: [ 3647.893554] [] (handle_irq_event_percpu+0x68/0x230) from [] (handle_irq_event+0x40/0x60)
Oct 5 14:32:51 omap kernel: [ 3647.893585] [] (handle_irq_event+0x40/0x60) from [] (handle_level_irq+0xb0/0x13c)
Oct 5 14:32:51 omap kernel: [ 3647.893615] [] (handle_level_irq+0xb0/0x13c) from [] (generic_handle_irq+0x30/0x40)
Oct 5 14:32:51 omap kernel: [ 3647.893615] [] (generic_handle_irq+0x30/0x40) from [] (asm_do_IRQ+0x58/0xac)
Oct 5 14:32:51 omap kernel: [ 3647.893676] [] (asm_do_IRQ+0x58/0xac) from [] (__irq_svc+0x38/0x100)
Oct 5 14:32:51 omap kernel: [ 3647.893676] Exception stack(0xc086ff20 to 0xc086ff68)
Oct 5 14:32:51 omap kernel: [ 3647.893707] ff20: 00000000 00060db8 00060db8 00000000 c08e1d74 c0daa260 00000003 c0daa260
Oct 5 14:32:51 omap kernel: [ 3647.893707] ff40: 00000003 c08e027c c0daa260 00000000 00000000 c086ff68 c007bccc c007bcd4
Oct 5 14:32:51 omap kernel: [ 3647.893737] ff60: 600d0053 ffffffff
Oct 5 14:32:51 omap kernel: [ 3647.893737] [] (__irq_svc+0x38/0x100) from [] (omap3_enter_idle+0xb4/0x128)
Oct 5 14:32:51 omap kernel: [ 3647.893768] [] (omap3_enter_idle+0xb4/0x128) from [] (cpuidle_idle_call+0xd4/0x24c)
Oct 5 14:32:51 omap kernel: [ 3647.893798] [] (cpuidle_idle_call+0xd4/0x24c) from [] (cpu_idle+0xc0/0xf4)
Oct 5 14:32:51 omap kernel: [ 3647.893829] [] (cpu_idle+0xc0/0xf4) from [] (start_kernel+0x324/0x330)
Oct 5 14:32:51 omap kernel: [ 3647.893859] [] (start_kernel+0x324/0x330) from [<80008044>] (0x80008044)
Oct 5 14:32:51 omap kernel: [ 3647.893859] Mem-info:
Oct 5 14:32:51 omap kernel: [ 3647.893890] Normal per-cpu:
Oct 5 14:32:51 omap kernel: [ 3647.893890] CPU 0: hi: 186, btch: 31 usd: 62
Oct 5 14:32:51 omap kernel: [ 3647.893920] active_anon:7661 inactive_anon:112 isolated_anon:0
Oct 5 14:32:51 omap kernel: [ 3647.893920] active_file:27561 inactive_file:31379 isolated_file:7
Oct 5 14:32:51 omap kernel: [ 3647.893920] unevictable:0 dirty:3841 writeback:3893 unstable:0
Oct 5 14:32:51 omap kernel: [ 3647.893920] free:47467 slab_reclaimable:3913 slab_unreclaimable:1610
Oct 5 14:32:51 omap kernel: [ 3647.893920] mapped:1802 shmem:136 pagetables:229 bounce:0
Oct 5 14:32:51 omap kernel: [ 3647.893981] Normal free:189868kB min:16384kB low:20480kB high:24576kB active_anon:30644kB inactive_anon:448kB active_file:110244kB inactive_file:125516kB unevictable:0kB isolated(anon):0kB isolated(file):28kB present:501760kB mlocked:0kB dirty:15364kB writeback:15572kB mapped:7208kB shmem:544kB slab_reclaimable:15652kB slab_unreclaimable:6440kB kernel_stack:728kB pagetables:916kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
Oct 5 14:32:51 omap kernel: [ 3647.894012] lowmem_reserve: 0 0 0
Oct 5 14:32:51 omap kernel: [ 3647.894012] Normal: 289554kB 90608kB 216kB 032kB 064kB 0128kB 0256kB 1512kB 11024kB 02048kB 04096kB = 189868kB
Oct 5 14:32:51 omap kernel: [ 3647.894073] 59081 total pagecache pages
Oct 5 14:32:51 omap kernel: [ 3647.894073] 0 pages in swap cache
Oct 5 14:32:51 omap kernel: [ 3647.894073] Swap cache stats: add 0, delete 0, find 0/0
Oct 5 14:32:51 omap kernel: [ 3647.894104] Free swap = 0kB
Oct 5 14:32:51 omap kernel: [ 3647.894104] Total swap = 0kB
Oct 5 14:32:51 omap kernel: [ 3647.911224] 131072 pages of RAM
Oct 5 14:32:51 omap kernel: [ 3647.911224] 47739 free pages
Oct 5 14:32:51 omap kernel: [ 3647.911224] 8637 reserved pages
Oct 5 14:32:51 omap kernel: [ 3647.911254] 5169 slab pages
Oct 5 14:32:51 omap kernel: [ 3647.911254] 51757 pages shared
Oct 5 14:32:51 omap kernel: [ 3647.911254] 0 pages swap cached
Oct 5 14:32:51 omap kernel: [ 3647.911346] swapper: page allocation failure: order:3, mode:0x4020
Oct 5 14:32:51 omap kernel: [ 3647.911407] [] (unwind_backtrace+0x0/0xf8) from [] (warn_alloc_failed+0xc4/0x114)
Oct 5 14:32:51 omap kernel: [ 3647.911437] [] (warn_alloc_failed+0xc4/0x114) from [] (__alloc_pages_nodemask+0x4e4/0x72c)
Oct 5 14:32:51 omap kernel: [ 3647.911468] [] (__alloc_pages_nodemask+0x4e4/0x72c) from [] (__get_free_pages+0x10/0x24)
Oct 5 14:32:51 omap kernel: [ 3647.911468] [] (__get_free_pages+0x10/0x24) from [] (kmalloc_order_trace+0x24/0x8c)
Oct 5 14:32:51 omap kernel: [ 3647.911499] [] (kmalloc_order_trace+0x24/0x8c) from [] (__alloc_skb+0x54/0xe0)
Oct 5 14:32:51 omap kernel: [ 3647.911529] [] (__alloc_skb+0x54/0xe0) from [] (rx_submit+0x24/0x1e4)
Oct 5 14:32:51 omap kernel: [ 3647.911560] [] (rx_submit+0x24/0x1e4) from [] (usb_hcd_giveback_urb+0x64/0xf8)
Oct 5 14:32:51 omap kernel: [ 3647.911590] [] (usb_hcd_giveback_urb+0x64/0xf8) from [] (ehci_urb_done+0x9c/0xb0)
Oct 5 14:32:51 omap kernel: [ 3647.911590] [] (ehci_urb_done+0x9c/0xb0) from [] (qh_completions+0x248/0x454)
Oct 5 14:32:51 omap kernel: [ 3647.911621] [] (qh_completions+0x248/0x454) from [] (ehci_work+0xd0/0xa88)
Oct 5 14:32:51 omap kernel: [ 3647.911651] [] (ehci_work+0xd0/0xa88) from [] (ehci_irq+0x27c/0x29c)
Oct 5 14:32:51 omap kernel: [ 3647.911651] [] (ehci_irq+0x27c/0x29c) from [] (usb_hcd_irq+0x34/0x84)
Oct 5 14:32:51 omap kernel: [ 3647.911682] [] (usb_hcd_irq+0x34/0x84) from [] (handle_irq_event_percpu+0x68/0x230)
Oct 5 14:32:51 omap kernel: [ 3647.911712] [] (handle_irq_event_percpu+0x68/0x230) from [] (handle_irq_event+0x40/0x60)
Oct 5 14:32:51 omap kernel: [ 3647.911743] [] (handle_irq_event+0x40/0x60) from [] (handle_level_irq+0xb0/0x13c)
Oct 5 14:32:51 omap kernel: [ 3647.911773] [] (handle_level_irq+0xb0/0x13c) from [] (generic_handle_irq+0x30/0x40)
Oct 5 14:32:51 omap kernel: [ 3647.911804] [] (generic_handle_irq+0x30/0x40) from [] (asm_do_IRQ+0x58/0xac)
Oct 5 14:32:51 omap kernel: [ 3647.911834] [] (asm_do_IRQ+0x58/0xac) from [] (__irq_svc+0x38/0x100)
Oct 5 14:32:51 omap kernel: [ 3647.911834] Exception stack(0xc086ff20 to 0xc086ff68)
Oct 5 14:32:51 omap kernel: [ 3647.911865] ff20: 00000000 00060db8 00060db8 00000000 c08e1d74 c0daa260 00000003 c0daa260
Oct 5 14:32:51 omap kernel: [ 3647.911865] ff40: 00000003 c08e027c c0daa260 00000000 00000000 c086ff68 c007bccc c007bcd4
Oct 5 14:32:51 omap kernel: [ 3647.911895] ff60: 600d0053 ffffffff
Oct 5 14:32:51 omap kernel: [ 3647.911895] [] (__irq_svc+0x38/0x100) from [] (omap3_enter_idle+0xb4/0x128)
Oct 5 14:32:51 omap kernel: [ 3647.911926] [] (omap3_enter_idle+0xb4/0x128) from [] (cpuidle_idle_call+0xd4/0x24c)
Oct 5 14:32:51 omap kernel: [ 3647.911956] [] (cpuidle_idle_call+0xd4/0x24c) from [] (cpu_idle+0xc0/0xf4)
Oct 5 14:32:51 omap kernel: [ 3647.911987] [] (cpu_idle+0xc0/0xf4) from [] (start_kernel+0x324/0x330)
Oct 5 14:32:51 omap kernel: [ 3647.912017] [] (start_kernel+0x324/0x330) from [<80008044>] (0x80008044)
Oct 5 14:32:51 omap kernel: [ 3647.912017] Mem-info:
Oct 5 14:32:51 omap kernel: [ 3647.912017] Normal per-cpu:
Oct 5 14:32:51 omap kernel: [ 3647.912048] CPU 0: hi: 186, btch: 31 usd: 62
Oct 5 14:32:51 omap kernel: [ 3647.912048] active_anon:7661 inactive_anon:112 isolated_anon:0
Oct 5 14:32:51 omap kernel: [ 3647.912078] active_file:27561 inactive_file:31379 isolated_file:7
Oct 5 14:32:51 omap kernel: [ 3647.912078] unevictable:0 dirty:3841 writeback:3893 unstable:0
Oct 5 14:32:51 omap kernel: [ 3647.912078] free:47467 slab_reclaimable:3913 slab_unreclaimable:1610
Oct 5 14:32:51 omap kernel: [ 3647.912078] mapped:1802 shmem:136 pagetables:229 bounce:0
Oct 5 14:32:51 omap kernel: [ 3647.912109] Normal free:189868kB min:16384kB low:20480kB high:24576kB active_anon:30644kB inactive_anon:448kB active_file:110244kB inactive_file:125516kB unevictable:0kB isolated(anon):0kB isolated(file):28kB present:501760kB mlocked:0kB dirty:15364kB writeback:15572kB mapped:7208kB shmem:544kB slab_reclaimable:15652kB slab_unreclaimable:6440kB kernel_stack:728kB pagetables:916kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
Oct 5 14:32:51 omap kernel: [ 3647.912170] lowmem_reserve[]: 0 0 0
Oct 5 14:32:51 omap kernel: [ 3647.912170] Normal: 289554kB 90608kB 216kB 032kB 064kB 0128kB 0256kB 1512kB 11024kB 02048kB 04096kB = 189868kB
Oct 5 14:32:51 omap kernel: [ 3647.912231] 59081 total pagecache pages
Oct 5 14:32:51 omap kernel: [ 3647.912231] 0 pages in swap cache
Oct 5 14:32:51 omap kernel: [ 3647.912231] Swap cache stats: add 0, delete 0, find 0/0
Oct 5 14:32:51 omap kernel: [ 3647.912231] Free swap = 0kB
Oct 5 14:32:51 omap kernel: [ 3647.912261] Total swap = 0kB
Oct 5 14:32:51 omap kernel: [ 3647.929260] 131072 pages of RAM
Oct 5 14:32:51 omap kernel: [ 3647.929290] 47739 free pages
Oct 5 14:32:51 omap kernel: [ 3647.929290] 8637 reserved pages
Oct 5 14:32:51 omap kernel: [ 3647.929290] 5169 slab pages
Oct 5 14:32:51 omap kernel: [ 3647.929290] 51757 pages shared
Oct 5 14:32:51 omap kernel: [ 3647.929290] 0 pages swap cached
Oct 5 14:32:51 omap kernel: [ 3647.929321] smsc95xx 1-2.1:1.0: eth0:

and in addition a lot of:
kevent 2 may have been dropped

As a quick workaround to test, what i think is going on…

Under load it’s probably the smsc95xx chipset running out of kernel
memory, bump: 8192 → 16384 in /etc/sysctl.conf

I’ve run some extensive test with various settings and it turned out that increasing this value eases the problem. With the suggested 16384
the board didn’t freeze anymore, however, I got some “path not found” abort messages on my windows client during copy.

With a setting of 65536, I was able to move a 15Gig file under full load without problems.

For my use-case for the BB (fileserver with additional torrent-daemon),
you think, is it wise to set this parameter to the largest possible value?

Best,
Kurt

2011/10/5 Robert Nelson <robertcnelson@gmail.com>

Kurt · October 8, 2011, 9:32pm

Hi Robert,

thank your for your fast response.

If you can get us a serial log, it would help shine more light on the
actual issue…

Actually, when the board froze, there wasn’t much to see. However, I found some interesting entries in kern and syslog:

kern.log had a lot these:
Oct 4 14:31:11 omap kernel: [30064.859466] smsc95xx 1-2.1:1.0: eth0: kevent 2 may have been dropped

syslog reported a stack exception:

Oct 5 14:32:51 omap kernel: [ 3647.893157] swapper: page allocation failure: order:3, mode:0x4020
Oct 5 14:32:51 omap kernel: [ 3647.893249] [] (unwind_backtrace+0x0/0xf8) from [] (warn_alloc_failed+0xc4/0x114)
Oct 5 14:32:51 omap kernel: [ 3647.893249] [] (warn_alloc_failed+0xc4/0x114) from [] (__alloc_pages_nodemask+0x4e4/0x72c)
Oct 5 14:32:51 omap kernel: [ 3647.893280] [] (__alloc_pages_nodemask+0x4e4/0x72c) from [] (__get_free_pages+0x10/0x24)
Oct 5 14:32:51 omap kernel: [ 3647.893310] [] (__get_free_pages+0x10/0x24) from [] (kmalloc_order_trace+0x24/0x8c)
Oct 5 14:32:51 omap kernel: [ 3647.893341] [] (kmalloc_order_trace+0x24/0x8c) from [] (__alloc_skb+0x54/0xe0)
Oct 5 14:32:51 omap kernel: [ 3647.893371] [] (__alloc_skb+0x54/0xe0) from [] (rx_submit+0x24/0x1e4)
Oct 5 14:32:51 omap kernel: [ 3647.893371] [] (rx_submit+0x24/0x1e4) from [] (usb_hcd_giveback_urb+0x64/0xf8)
Oct 5 14:32:51 omap kernel: [ 3647.893402] [] (usb_hcd_giveback_urb+0x64/0xf8) from [] (ehci_urb_done+0x9c/0xb0)
Oct 5 14:32:51 omap kernel: [ 3647.893432] [] (ehci_urb_done+0x9c/0xb0) from [] (qh_completions+0x248/0x454)
Oct 5 14:32:51 omap kernel: [ 3647.893463] [] (qh_completions+0x248/0x454) from [] (ehci_work+0xd0/0xa88)
Oct 5 14:32:51 omap kernel: [ 3647.893463] [] (ehci_work+0xd0/0xa88) from [] (ehci_irq+0x27c/0x29c)
Oct 5 14:32:51 omap kernel: [ 3647.893493] [] (ehci_irq+0x27c/0x29c) from [] (usb_hcd_irq+0x34/0x84)
Oct 5 14:32:51 omap kernel: [ 3647.893524] [] (usb_hcd_irq+0x34/0x84) from [] (handle_irq_event_percpu+0x68/0x230)
Oct 5 14:32:51 omap kernel: [ 3647.893554] [] (handle_irq_event_percpu+0x68/0x230) from [] (handle_irq_event+0x40/0x60)
Oct 5 14:32:51 omap kernel: [ 3647.893585] [] (handle_irq_event+0x40/0x60) from [] (handle_level_irq+0xb0/0x13c)
Oct 5 14:32:51 omap kernel: [ 3647.893615] [] (handle_level_irq+0xb0/0x13c) from [] (generic_handle_irq+0x30/0x40)
Oct 5 14:32:51 omap kernel: [ 3647.893615] [] (generic_handle_irq+0x30/0x40) from [] (asm_do_IRQ+0x58/0xac)
Oct 5 14:32:51 omap kernel: [ 3647.893676] [] (asm_do_IRQ+0x58/0xac) from [] (__irq_svc+0x38/0x100)
Oct 5 14:32:51 omap kernel: [ 3647.893676] Exception stack(0xc086ff20 to 0xc086ff68)
Oct 5 14:32:51 omap kernel: [ 3647.893707] ff20: 00000000 00060db8 00060db8 00000000 c08e1d74 c0daa260 00000003 c0daa260
Oct 5 14:32:51 omap kernel: [ 3647.893707] ff40: 00000003 c08e027c c0daa260 00000000 00000000 c086ff68 c007bccc c007bcd4
Oct 5 14:32:51 omap kernel: [ 3647.893737] ff60: 600d0053 ffffffff
Oct 5 14:32:51 omap kernel: [ 3647.893737] [] (__irq_svc+0x38/0x100) from [] (omap3_enter_idle+0xb4/0x128)
Oct 5 14:32:51 omap kernel: [ 3647.893768] [] (omap3_enter_idle+0xb4/0x128) from [] (cpuidle_idle_call+0xd4/0x24c)
Oct 5 14:32:51 omap kernel: [ 3647.893798] [] (cpuidle_idle_call+0xd4/0x24c) from [] (cpu_idle+0xc0/0xf4)
Oct 5 14:32:51 omap kernel: [ 3647.893829] [] (cpu_idle+0xc0/0xf4) from [] (start_kernel+0x324/0x330)
Oct 5 14:32:51 omap kernel: [ 3647.893859] [] (start_kernel+0x324/0x330) from [<80008044>] (0x80008044)
Oct 5 14:32:51 omap kernel: [ 3647.893859] Mem-info:
Oct 5 14:32:51 omap kernel: [ 3647.893890] Normal per-cpu:
Oct 5 14:32:51 omap kernel: [ 3647.893890] CPU 0: hi: 186, btch: 31 usd: 62
Oct 5 14:32:51 omap kernel: [ 3647.893920] active_anon:7661 inactive_anon:112 isolated_anon:0
Oct 5 14:32:51 omap kernel: [ 3647.893920] active_file:27561 inactive_file:31379 isolated_file:7
Oct 5 14:32:51 omap kernel: [ 3647.893920] unevictable:0 dirty:3841 writeback:3893 unstable:0
Oct 5 14:32:51 omap kernel: [ 3647.893920] free:47467 slab_reclaimable:3913 slab_unreclaimable:1610
Oct 5 14:32:51 omap kernel: [ 3647.893920] mapped:1802 shmem:136 pagetables:229 bounce:0
Oct 5 14:32:51 omap kernel: [ 3647.893981] Normal free:189868kB min:16384kB low:20480kB high:24576kB active_anon:30644kB inactive_anon:448kB active_file:110244kB inactive_file:125516kB unevictable:0kB isolated(anon):0kB isolated(file):28kB present:501760kB mlocked:0kB dirty:15364kB writeback:15572kB mapped:7208kB shmem:544kB slab_reclaimable:15652kB slab_unreclaimable:6440kB kernel_stack:728kB pagetables:916kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
Oct 5 14:32:51 omap kernel: [ 3647.894012] lowmem_reserve: 0 0 0
Oct 5 14:32:51 omap kernel: [ 3647.894012] Normal: 289554kB 90608kB 216kB 032kB 064kB 0128kB 0256kB 1512kB 11024kB 02048kB 04096kB = 189868kB
Oct 5 14:32:51 omap kernel: [ 3647.894073] 59081 total pagecache pages
Oct 5 14:32:51 omap kernel: [ 3647.894073] 0 pages in swap cache
Oct 5 14:32:51 omap kernel: [ 3647.894073] Swap cache stats: add 0, delete 0, find 0/0
Oct 5 14:32:51 omap kernel: [ 3647.894104] Free swap = 0kB
Oct 5 14:32:51 omap kernel: [ 3647.894104] Total swap = 0kB
Oct 5 14:32:51 omap kernel: [ 3647.911224] 131072 pages of RAM
Oct 5 14:32:51 omap kernel: [ 3647.911224] 47739 free pages
Oct 5 14:32:51 omap kernel: [ 3647.911224] 8637 reserved pages
Oct 5 14:32:51 omap kernel: [ 3647.911254] 5169 slab pages
Oct 5 14:32:51 omap kernel: [ 3647.911254] 51757 pages shared
Oct 5 14:32:51 omap kernel: [ 3647.911254] 0 pages swap cached
Oct 5 14:32:51 omap kernel: [ 3647.911346] swapper: page allocation failure: order:3, mode:0x4020
Oct 5 14:32:51 omap kernel: [ 3647.911407] [] (unwind_backtrace+0x0/0xf8) from [] (warn_alloc_failed+0xc4/0x114)
Oct 5 14:32:51 omap kernel: [ 3647.911437] [] (warn_alloc_failed+0xc4/0x114) from [] (__alloc_pages_nodemask+0x4e4/0x72c)
Oct 5 14:32:51 omap kernel: [ 3647.911468] [] (__alloc_pages_nodemask+0x4e4/0x72c) from [] (__get_free_pages+0x10/0x24)
Oct 5 14:32:51 omap kernel: [ 3647.911468] [] (__get_free_pages+0x10/0x24) from [] (kmalloc_order_trace+0x24/0x8c)
Oct 5 14:32:51 omap kernel: [ 3647.911499] [] (kmalloc_order_trace+0x24/0x8c) from [] (__alloc_skb+0x54/0xe0)
Oct 5 14:32:51 omap kernel: [ 3647.911529] [] (__alloc_skb+0x54/0xe0) from [] (rx_submit+0x24/0x1e4)
Oct 5 14:32:51 omap kernel: [ 3647.911560] [] (rx_submit+0x24/0x1e4) from [] (usb_hcd_giveback_urb+0x64/0xf8)
Oct 5 14:32:51 omap kernel: [ 3647.911590] [] (usb_hcd_giveback_urb+0x64/0xf8) from [] (ehci_urb_done+0x9c/0xb0)
Oct 5 14:32:51 omap kernel: [ 3647.911590] [] (ehci_urb_done+0x9c/0xb0) from [] (qh_completions+0x248/0x454)
Oct 5 14:32:51 omap kernel: [ 3647.911621] [] (qh_completions+0x248/0x454) from [] (ehci_work+0xd0/0xa88)
Oct 5 14:32:51 omap kernel: [ 3647.911651] [] (ehci_work+0xd0/0xa88) from [] (ehci_irq+0x27c/0x29c)
Oct 5 14:32:51 omap kernel: [ 3647.911651] [] (ehci_irq+0x27c/0x29c) from [] (usb_hcd_irq+0x34/0x84)
Oct 5 14:32:51 omap kernel: [ 3647.911682] [] (usb_hcd_irq+0x34/0x84) from [] (handle_irq_event_percpu+0x68/0x230)
Oct 5 14:32:51 omap kernel: [ 3647.911712] [] (handle_irq_event_percpu+0x68/0x230) from [] (handle_irq_event+0x40/0x60)
Oct 5 14:32:51 omap kernel: [ 3647.911743] [] (handle_irq_event+0x40/0x60) from [] (handle_level_irq+0xb0/0x13c)
Oct 5 14:32:51 omap kernel: [ 3647.911773] [] (handle_level_irq+0xb0/0x13c) from [] (generic_handle_irq+0x30/0x40)
Oct 5 14:32:51 omap kernel: [ 3647.911804] [] (generic_handle_irq+0x30/0x40) from [] (asm_do_IRQ+0x58/0xac)
Oct 5 14:32:51 omap kernel: [ 3647.911834] [] (asm_do_IRQ+0x58/0xac) from [] (__irq_svc+0x38/0x100)
Oct 5 14:32:51 omap kernel: [ 3647.911834] Exception stack(0xc086ff20 to 0xc086ff68)
Oct 5 14:32:51 omap kernel: [ 3647.911865] ff20: 00000000 00060db8 00060db8 00000000 c08e1d74 c0daa260 00000003 c0daa260
Oct 5 14:32:51 omap kernel: [ 3647.911865] ff40: 00000003 c08e027c c0daa260 00000000 00000000 c086ff68 c007bccc c007bcd4
Oct 5 14:32:51 omap kernel: [ 3647.911895] ff60: 600d0053 ffffffff
Oct 5 14:32:51 omap kernel: [ 3647.911895] [] (__irq_svc+0x38/0x100) from [] (omap3_enter_idle+0xb4/0x128)
Oct 5 14:32:51 omap kernel: [ 3647.911926] [] (omap3_enter_idle+0xb4/0x128) from [] (cpuidle_idle_call+0xd4/0x24c)
Oct 5 14:32:51 omap kernel: [ 3647.911956] [] (cpuidle_idle_call+0xd4/0x24c) from [] (cpu_idle+0xc0/0xf4)
Oct 5 14:32:51 omap kernel: [ 3647.911987] [] (cpu_idle+0xc0/0xf4) from [] (start_kernel+0x324/0x330)
Oct 5 14:32:51 omap kernel: [ 3647.912017] [] (start_kernel+0x324/0x330) from [<80008044>] (0x80008044)
Oct 5 14:32:51 omap kernel: [ 3647.912017] Mem-info:
Oct 5 14:32:51 omap kernel: [ 3647.912017] Normal per-cpu:
Oct 5 14:32:51 omap kernel: [ 3647.912048] CPU 0: hi: 186, btch: 31 usd: 62
Oct 5 14:32:51 omap kernel: [ 3647.912048] active_anon:7661 inactive_anon:112 isolated_anon:0
Oct 5 14:32:51 omap kernel: [ 3647.912078] active_file:27561 inactive_file:31379 isolated_file:7
Oct 5 14:32:51 omap kernel: [ 3647.912078] unevictable:0 dirty:3841 writeback:3893 unstable:0
Oct 5 14:32:51 omap kernel: [ 3647.912078] free:47467 slab_reclaimable:3913 slab_unreclaimable:1610
Oct 5 14:32:51 omap kernel: [ 3647.912078] mapped:1802 shmem:136 pagetables:229 bounce:0
Oct 5 14:32:51 omap kernel: [ 3647.912109] Normal free:189868kB min:16384kB low:20480kB high:24576kB active_anon:30644kB inactive_anon:448kB active_file:110244kB inactive_file:125516kB unevictable:0kB isolated(anon):0kB isolated(file):28kB present:501760kB mlocked:0kB dirty:15364kB writeback:15572kB mapped:7208kB shmem:544kB slab_reclaimable:15652kB slab_unreclaimable:6440kB kernel_stack:728kB pagetables:916kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
Oct 5 14:32:51 omap kernel: [ 3647.912170] lowmem_reserve[]: 0 0 0
Oct 5 14:32:51 omap kernel: [ 3647.912170] Normal: 289554kB 90608kB 216kB 032kB 064kB 0128kB 0256kB 1512kB 11024kB 02048kB 04096kB = 189868kB
Oct 5 14:32:51 omap kernel: [ 3647.912231] 59081 total pagecache pages
Oct 5 14:32:51 omap kernel: [ 3647.912231] 0 pages in swap cache
Oct 5 14:32:51 omap kernel: [ 3647.912231] Swap cache stats: add 0, delete 0, find 0/0
Oct 5 14:32:51 omap kernel: [ 3647.912231] Free swap = 0kB
Oct 5 14:32:51 omap kernel: [ 3647.912261] Total swap = 0kB
Oct 5 14:32:51 omap kernel: [ 3647.929260] 131072 pages of RAM
Oct 5 14:32:51 omap kernel: [ 3647.929290] 47739 free pages
Oct 5 14:32:51 omap kernel: [ 3647.929290] 8637 reserved pages
Oct 5 14:32:51 omap kernel: [ 3647.929290] 5169 slab pages
Oct 5 14:32:51 omap kernel: [ 3647.929290] 51757 pages shared
Oct 5 14:32:51 omap kernel: [ 3647.929290] 0 pages swap cached
Oct 5 14:32:51 omap kernel: [ 3647.929321] smsc95xx 1-2.1:1.0: eth0:

and in addition a lot of:
kevent 2 may have been dropped

As a quick workaround to test, what i think is going on…

Under load it’s probably the smsc95xx chipset running out of kernel
memory, bump: 8192 → 16384 in /etc/sysctl.conf

I’ve run some extensive test with various settings and it turned out that increasing this value eases the problem. With the suggested 16384
the board didn’t freeze anymore, however, I got some “path not found” abort messages on my windows client during copy.

With a setting of 65536, I was able to move a 15Gig file under full load without problems.

For my use-case for the BB (fileserver with additional torrent-daemon),
you think, is it wise to set this parameter to the largest possible value?

Best,
Kurt

2011/10/5 Robert Nelson <robertcnelson@gmail.com>

vjvargas · October 19, 2012, 5:02pm

Hi mr Nelson,

happens to me that I have the same exact issue with my BBxM, so far, the only solution was to reset the board, since I can only troubleshoot the BB via remote desktop, someone else has to press the reset button manually, my only worry is why the board freezes, I mean, my question is if the system stops working, or there is some services that stop working and the system is still running… Anyway I took the workaround you proposed and hope there is no more kevent 4 may have been dropped. I running a script that hourly makes a database backup in a remote shared directory using smbclient, but lately I had to stop doing that presuming the issue was the smbclient freezing the board every day,

best regards,

VJ

RobertCNelson · October 19, 2012, 5:09pm

This actually effects all devices with an smsc95xx based
hub/ethernet.. (Including the Panda, Rasberry Pi, etc..)

For the Beagle, i'm currently setting it to "16384" by default, and
for the panda "32768"...

Regards,

SuperJet · October 19, 2012, 6:55pm

I think if you power supply is not 5V/2A, it may lead to such result on USB prepherials … I faced such thing with same version Ubu11.04, but it was related to my power supply 5V, 500ma, then after change it works well, also I use uSD Class10 without problems.

Daniel_Mosquera · October 19, 2012, 11:22pm

I've been testing for two weeks with a 500Mb usb hd, a 2 mp usb webcam, a ftdi usb rs232 usb converter, and a wifi 2w usb dongle with no probrems but when i used a 4.9-5v power supply it used to hang with no aparent reason. Now I'm using a 5.2V 2A power supply and it doesn't hang.

Also I tested a 5.2V 3A power supply with peaks of 1.6A with no problems, but in general the BB-xM with the 5.2V 2A power supply works very well for me with 1.6A peaks.

vjvargas · October 20, 2012, 4:45pm

Cool, I’m planning something similar, I’m running mysql and the filesystem gets corrupts about each three days, mi idea is to port the database directory to an external HD, to reduce the W/R load on the SD. I’m testing that configuration adding a database backup on a network shared folder every hour. The issue with the kevent 4 may have been dropped message has stopped since I changed the memory amount in the configuration file, I’ll try to keep you up to date with my test, and I also would like to know the results on your testing,

regards,

VJ