2009-01-19 08:48:19     change the library-path in uCLinux-2009pre

2009-01-19 08:48:19     change the library-path in uCLinux-2009pre

Patrick Hotz (GERMANY)

Message: 68102   

Hi guys,

i try to make my uCLinux-filesystem smaller because my Ram-disk uses too much space of my Ram.....

My idea is that i save the libraries on my JFFS2-Filesystem on my Flash.

But where can i say that the path to the libraries is not "/lib" or "/usr/lib" but "/media/lib" or "media/usr/lib" ?

Can somebody give me an example how i can change this paths?

greetings

Patrick

TranslateQuoteReplyEditDelete

2009-01-19 09:51:54     Re: change the library-path in uCLinux-2009pre

Mike Frysinger (UNITED STATES)

Message: 68106   

you cant change the paths in the build system and such, but you can cheat and make them symlinks.  initial romfs/ setup is handled by your board's Makefile in uclinux-dist/$vendor/$board/Makefile.

QuoteReplyEditDelete

2009-01-19 10:23:42     Re: change the library-path in uCLinux-2009pre

Patrick Hotz (GERMANY)

Message: 68109   

Hi Mike,

I have just looked at the Board-Makefile in ....Vendors/Bluetechnix/TCM-BF537.

I am a little bit confused because the makefile looks very complex and i dont know what all this things means.

The only things i know in this file is the size of the Ram-disk.....

Can you explain me where i can set the symlinks and exclude the library-files?

- Patrick

TranslateQuoteReplyEditDelete

2009-01-19 10:29:16     Re: change the library-path in uCLinux-2009pre

Mike Frysinger (UNITED STATES)

Message: 68110   

just remove lib from ROMFS_DIRS-y and then add a new line like the one that links /sbin to bin

QuoteReplyEditDelete

2009-01-19 10:49:54     Re: change the library-path in uCLinux-2009pre

Patrick Hotz (GERMANY)

Message: 68111   

Hi Mike,

i have just tried to do this but there is a error:

...

romfs-inst.sh -s lib /media/lib

ln: Erzeuge symbolische Verknüpfung "/home/photz/uclinux-dist/romfs/media/lib": Datei oder Verzeichnis nicht gefunden

make[2]: *** [romfs] Fehler 1

...

Is that a problem of my SD-Card?

The /media folder is my SD-Card which i mount....

but the media/lib is a folder in my SD-Card.....

- Patrick

TranslateQuoteReplyEditDelete

2009-01-19 10:57:18     Re: change the library-path in uCLinux-2009pre

Mike Frysinger (UNITED STATES)

Message: 68112   

please read the man page of `ln`.  you've inverted the targets.

also, if you're using ELF, then /lib needs to be available in order to execute ... the kernel wont mount /media for you

QuoteReplyEditDelete

2009-01-19 11:10:25     Re: change the library-path in uCLinux-2009pre

Patrick Hotz (GERMANY)

Message: 68113   

Sorry, my mistake....

but the /usr/lib will not be used during boot ?

My next try is that i move this folder onto my SD-Card...

Where is the symlik to this folder? I cant find it in my Makefile...

- Patrick

TranslateQuoteReplyEditDelete

2009-01-19 11:16:42     Re: change the library-path in uCLinux-2009pre

Mike Frysinger (UNITED STATES)

Message: 68114   

Linux convention is that nothing in /usr is needed when booting

QuoteReplyEditDelete

2009-01-19 11:24:56     Re: change the library-path in uCLinux-2009pre

Patrick Hotz (GERMANY)

Message: 68115   

OK, that means that i can link the whole contents onto my SD-Card.

The size of the files in this folder are very large and the qt-libraries are slso save onto this folder.

Where can i set a symlink of this folder to the usr/ folder on my SD-Card?

Is there any other Makefile like the Board-Makefile?

- Patrick

TranslateQuoteReplyEditDelete

2009-01-19 11:41:44     Re: change the library-path in uCLinux-2009pre

Mike Frysinger (UNITED STATES)

Message: 68116   

do it in the makefile already mentioned

QuoteReplyEditDelete

2009-01-20 04:14:08     Re: change the library-path in uCLinux-2009pre

Patrick Hotz (GERMANY)

Message: 68137   

Hi Mike,

now i have successful set a symlink of my /usr-folder onto the folder at my SD-Card..

The ls shows this:

root:/> ls -al

drwxr-xr-x   15 root     root         1024 Jan 20 09:16 .

drwxr-xr-x   15 root     root         1024 Jan 20 09:16 ..

drwxr-xr-x    2 1001     1001         2048 Jan 20 08:09 bin

drwxr-xr-x    4 root     root         2048 Jan 20 09:13 dev

drwxr-xr-x    4 1001     1001         1024 Jan 20 08:10 etc

drwxr-xr-x    3 root     root            0 Jan  1  1970 flash

drwxr-xr-x    2 1001     1001         1024 Jan 20 08:09 home

drwxr-xr-x    3 1001     1001         1024 Jan 20 08:10 lib

drwxr-xr-x    7 root     root         4096 Jan 20 09:53 media

drwxr-xr-x    2 1001     1001         1024 Jan 20 08:09 mnt

dr-xr-xr-x   31 root     root            0 Jan  1  2007 proc

drwxr-xr-x    2 1001     1001         1024 Jan 20 08:09 root

lrwxrwxrwx    1 1001     1001            3 Jan 20 08:09 sbin -> bin

drwxr-xr-x   12 root     root            0 Jan  1  2007 sys

drwxrwxrwt    2 1001     1001         1024 Jan 20 08:09 tmp

lrwxrwxrwx    1 root     root           10 Jan 20 09:16 usr -> /media/usr

drwxr-xr-x    6 root     root            0 Jan 20 09:13 var

The free Ram is now much more than previously..

free shows this:

root:/> free

              total         used         free       shared      buffers

  Mem:        24636         4460        20176            0           48

I have thought this reaches for the tetrix-qt-application or something else in the qt-sample dir....

But if i execute one of this programms it looks like there is still not enught free RAM.

root:/media/tetrix> ./tetrix -qws -display VNC:0

tetrix: page allocation failure. order:11, mode:0x40d0

Hardware Trace:

   0 Target : <0x00004928> { _dump_stack + 0x0 }

     Source : <0x00032602> { ___alloc_pages_internal + 0x1be } CALL pcrel

   1 Target : <0x00032602> { ___alloc_pages_internal + 0x1be }

     Source : <0x0000e4e6> { _printk + 0x16 } RTS

   2 Target : <0x0000e4e2> { _printk + 0x12 }

     Source : <0x0000ed0c> { _vprintk + 0x130 } RTS

   3 Target : <0x0000ed00> { _vprintk + 0x124 }

     Source : <0xffa00bd0> { __common_int_entry + 0xd8 } RTI

   4 Target : <0xffa00b6e> { __common_int_entry + 0x76 }

     Source : <0xffa009b8> { _return_from_int + 0x58 } RTS

   5 Target : <0xffa009b8> { _return_from_int + 0x58 }

     Source : <0xffa0098e> { _return_from_int + 0x2e } IF !CC JUMP

   6 Target : <0xffa00960> { _return_from_int + 0x0 }

     Source : <0xffa00b6a> { __common_int_entry + 0x72 } CALL pcrel

   7 Target : <0xffa00b68> { __common_int_entry + 0x70 }

     Source : <0xffa0035a> { _asm_do_IRQ + 0x6e } RTS

   8 Target : <0xffa00352> { _asm_do_IRQ + 0x66 }

     Source : <0x0001228a> { __local_bh_enable + 0x3e } RTS

   9 Target : <0x0001224c> { __local_bh_enable + 0x0 }

     Source : <0x00012374> { ___do_softirq + 0xa0 } JUMP.L

  10 Target : <0x0001236c> { ___do_softirq + 0x98 }

     Source : <0x00012350> { ___do_softirq + 0x7c } IF !CC JUMP

  11 Target : <0x00012332> { ___do_softirq + 0x5e }

     Source : <0x0002d368> { _rcu_process_callbacks + 0x30 } RTS

  12 Target : <0x0002d364> { _rcu_process_callbacks + 0x2c }

     Source : <0x0002d29e> { ___rcu_process_callbacks + 0x132 } RTS

  13 Target : <0x0002d298> { ___rcu_process_callbacks + 0x12c }

     Source : <0x0002d222> { ___rcu_process_callbacks + 0xb6 } IF !CC JUMP

  14 Target : <0x0002d21c> { ___rcu_process_callbacks + 0xb0 }

     Source : <0x0002d2a4> { ___rcu_process_callbacks + 0x138 } IF CC JUMP

  15 Target : <0x0002d2a0> { ___rcu_process_callbacks + 0x134 }

     Source : <0x0002d20e> { ___rcu_process_callbacks + 0xa2 } IF !CC JUMP

Stack info:

SP: [0x019e7e04] <0x019e7e04> /* kernel dynamic memory */

FP: (0x019e7e10)

Memory from 0x019e7e00 to 019e8000

019e7e00:<000325da>[0039a6a0]<00032606> 0039a6a0 (00000000)<000240d0> 0039a888

019e7e20: 000040d0  00000001  00000048  019e6000  019e6000  00000000 <000240d0>

019e7e40: 00000010  00000000  00000000  00000000  00000000  000000f5 <0003272e>

019e7e60: 0069c000  018301a0  ffffffda  00000000  00000002  019ce5c0 <00039d2e>

019e7e80: 00000004  00000000 <00039f58> 00000000  00000000  0109f210 <0003e404>

019e7ea0: 00000000  00000000  00447620  00001000  00001000  0109f210 <000038c8>

019e7ec0: 0069b3ec  00397034  019e6000  00000002  019ce5c0  00000005  00001000

019e7ee0: 00000000  00000005  00000002  00000000 <ffa0082c> 00003880  000000c0

019e7f00: ffffe000  00000000  00000003  01938776 <001aec60> 0018948c  00001802

019e7f20: 00000000  003b34fe  00008000  00002000  00000000  019e8000  003b34fe

019e7f40:<003b2c92><ffa00d94> 02002020  003b5051  0185f8db  003b5050  0185f8da

019e7f60: 00000000  00000000  00000000  00000000  00000000  00000000  00000000

019e7f80: 00000000  00000000  00000000  00000000  00000000  00000000  00000000

019e7fa0: 00000000  00000000  00000000  004122a8  004db005  0109f0c0  0109f210

019e7fc0: 0109f23c  00397034  00000000  00397034  000000c0  0069b3ec  00000001

019e7fe0: 00000003  00001802  00000005  0069b3ec  00000000  00000000  000000c0

019e8000: 00100100

Return addresses in stack:

    address : <0x000325da> { ___alloc_pages_internal + 0x196 }

    address : <0x00032606> { ___alloc_pages_internal + 0x1c2 }

   frame  1 : <0x000240d0> { _timer_list_show + 0x424 }

    address : <0x000240d0> { _timer_list_show + 0x424 }

    address : <0x0003272e> { ___get_free_pages + 0x1e }

    address : <0x00039d2e> { _do_mmap_pgoff + 0x35a }

    address : <0x00039f58> { _do_mmap_pgoff + 0x584 }

    address : <0x0003e404> { _vfs_read + 0xac }

    address : <0x000038c8> { _sys_mmap2 + 0x48 }

    address : <0xffa0082c> { _system_call + 0x68 }

    address : <0x001aec60> { _bfin_debug_mmrs_init + 0x6bf0 }

    address : <0x003b2c92> [ /lib/ld-uClibc.so.0 + 0x2c92 ]

    address : <0xffa00d94> { _evt_system_call + 0x64 }

Mem-Info:

DMA per-cpu:

CPU    0: hi:    0, btch:   1 usd:   0

Active_anon:0 active_file:4 inactive_anon:0

inactive_file:0 dirty:0 writeback:0 unstable:0

free:5182 slab:457 mapped:0 pagetables:0 bounce:0

DMA free:20728kB min:648kB low:808kB high:972kB active_anon:0kB inactive_anon:0o

lowmem_reserve[]: 0 0 0

DMA: 60*4kB 55*8kB 31*16kB 21*32kB 13*64kB 13*128kB 10*256kB 7*512kB 2*1024kB 2B

4 total pagecache pages

6656 pages RAM

497 pages reserved

3 pages shared

954 pages non-shared

Allocation of length 6930432 from process 144 failed

DMA per-cpu:

CPU    0: hi:    0, btch:   1 usd:   0

Active_anon:0 active_file:4 inactive_anon:0

inactive_file:0 dirty:0 writeback:0 unstable:0

free:5182 slab:457 mapped:0 pagetables:0 bounce:0

DMA free:20728kB min:648kB low:808kB high:972kB active_anon:0kB inactive_anon:0o

lowmem_reserve[]: 0 0 0

DMA: 60*4kB 55*8kB 31*16kB 21*32kB 13*64kB 13*128kB 10*256kB 7*512kB 2*1024kB 2B

4 total pagecache pages

./tetrix:582: can't map '/usr/lib/libQtGui.so.4'

./tetrix: can't load library 'libQtGui.so.4

I am desperated.......

Is it realy impossible to get qt-programms running on a board with 32MB ram?

- Patrick

TranslateQuoteReplyEditDelete

2009-01-20 08:30:46     Re: change the library-path in uCLinux-2009pre

Robin Getz (UNITED STATES)

Message: 68149   

Patrick:

If you are running from a device with enough flash on it - can you run a flash file system as the rootfs (like jffs2)?

Also - I have seen this (added to the /etc/rc file) help:

echo 4096 > /proc/sys/vm/min_free_kbytes

echo 300  > /proc/sys/vm/vfs_cache_pressure

-Robin

QuoteReplyEditDelete

2009-01-21 04:42:08     Re: change the library-path in uCLinux-2009pre

Patrick Hotz (GERMANY)

Message: 68186   

Hi guys,

i have tried some ideas but the result is only a bit better than bevore....

My uClinux-image is now only the base-system which i need (LAN, FLASH, SD-Card).

This has reduced the size of the Ram-disk to 2048k.

So i have 2048k more Ram free:

root:/> free

              total         used         free       shared      buffers

  Mem:        27708         3972        23736            0           44

root:/>

My /usr folder is a symlink to /media/usr (on my SD-Card):

root:/> ls -al

drwxr-xr-x   15 root     root         1024 Jan  1 02:40 .

drwxr-xr-x   15 root     root         1024 Jan  1 02:40 ..

drwxr-xr-x    2 1001     1001         2048 Jan 21  2009 bin

drwxr-xr-x    4 root     root         2048 Jan  1 02:40 dev

drwxr-xr-x    4 1001     1001         1024 Jan 21  2009 etc

drwxr-xr-x    3 root     root            0 Jan  1 00:00 flash

drwxr-xr-x    2 1001     1001         1024 Jan 21  2009 home

drwxr-xr-x    3 1001     1001         1024 Jan 21  2009 lib

drwxr-xr-x    7 root     root         4096 Jan  1 00:00 media

drwxr-xr-x    2 1001     1001         1024 Jan 21  2009 mnt

dr-xr-xr-x   30 root     root            0 Jan  1  2007 proc

drwxr-xr-x    2 1001     1001         1024 Jan 21  2009 root

lrwxrwxrwx    1 1001     1001            3 Jan 21  2009 sbin -> bin

drwxr-xr-x   12 root     root            0 Jan  1  2007 sys

drwxrwxrwt    2 1001     1001         1024 Jan 21  2009 tmp

lrwxrwxrwx    1 root     root           11 Jan  1 02:40 usr -> /media/usr/

drwxr-xr-x    6 root     root            0 Jan  1 02:40 var

root:/>,

I also have added:

echo 4096 > /proc/sys/vm/min_free_kbytes

echo 300  > /proc/sys/vm/vfs_cache_pressure

to my rc-file....

If i try to execute the analogcl (a sample which is saved in ../staging/qt/examples/widgets/...)

root:/media/analogcl> ./analogcl -qws -display VNC:0

analogcl: page allocation failure. order:10, mode:0x40d0

Hardware Trace:

   0 Target : <0x00004928> { _dump_stack + 0x0 }

     Source : <0x00032602> { ___alloc_pages_internal + 0x1be } CALL pcrel

   1 Target : <0x00032602> { ___alloc_pages_internal + 0x1be }

     Source : <0x0000e4e6> { _printk + 0x16 } RTS

   2 Target : <0x0000e4e2> { _printk + 0x12 }

     Source : <0x0000ed0c> { _vprintk + 0x130 } RTS

   3 Target : <0x0000ed00> { _vprintk + 0x124 }

     Source : <0xffa00bd0> { __common_int_entry + 0xd8 } RTI

   4 Target : <0xffa00b6e> { __common_int_entry + 0x76 }

     Source : <0xffa009b8> { _return_from_int + 0x58 } RTS

   5 Target : <0xffa009b8> { _return_from_int + 0x58 }

     Source : <0xffa0098e> { _return_from_int + 0x2e } IF !CC JUMP

   6 Target : <0xffa00960> { _return_from_int + 0x0 }

     Source : <0xffa00b6a> { __common_int_entry + 0x72 } CALL pcrel

   7 Target : <0xffa00b68> { __common_int_entry + 0x70 }

     Source : <0xffa0035a> { _asm_do_IRQ + 0x6e } RTS

   8 Target : <0xffa00352> { _asm_do_IRQ + 0x66 }

     Source : <0x0001228a> { __local_bh_enable + 0x3e } RTS

   9 Target : <0x0001224c> { __local_bh_enable + 0x0 }

     Source : <0x00012374> { ___do_softirq + 0xa0 } JUMP.L

  10 Target : <0x0001236c> { ___do_softirq + 0x98 }

     Source : <0x00012350> { ___do_softirq + 0x7c } IF !CC JUMP

  11 Target : <0x00012332> { ___do_softirq + 0x5e }

     Source : <0x0002d368> { _rcu_process_callbacks + 0x30 } RTS

  12 Target : <0x0002d364> { _rcu_process_callbacks + 0x2c }

     Source : <0x0002d29e> { ___rcu_process_callbacks + 0x132 } RTS

  13 Target : <0x0002d298> { ___rcu_process_callbacks + 0x12c }

     Source : <0x0002d222> { ___rcu_process_callbacks + 0xb6 } IF !CC JUMP

  14 Target : <0x0002d21c> { ___rcu_process_callbacks + 0xb0 }

     Source : <0x0002d2a4> { ___rcu_process_callbacks + 0x138 } IF CC JUMP

  15 Target : <0x0002d2a0> { ___rcu_process_callbacks + 0x134 }

     Source : <0x0002d20e> { ___rcu_process_callbacks + 0xa2 } IF !CC JUMP

Stack info:

SP: [0x001b1e04] <0x001b1e04> { _reserve_bootmem + 0x14 }

FP: (0x001b1e10)

Memory from 0x001b1e00 to 001b2000

001b1e00:<000325da>[01c9a3a0]<00032606> 01c9a3a0 (00000000)<000240d0> 01c9a588

001b1e20: 000040d0  00000001  00000048  001b0000  001b0000  00000000 <000240d0>

001b1e40: 00000010  00000000  00000000  00000000  00000000  000000f5 <0003272e>

001b1e60: 00211000  00ab1ec0  ffffffda  00000000  00000002  01c964a0 <00039d2e>

001b1e80: 00000004  00000000 <00039f58> 00000000  00000000  019df1e8 <0003e404>

001b1ea0: 00000000  00000000  019474c0  00001000  00001000  019df1e8 <000038c8>

001b1ec0: 00210618  00aac034  001b0000  00000002  01c964a0  00000005  00001000

001b1ee0: 00000000  00000005  00000002  00000000 <ffa0082c> 00003880  000000c0

001b1f00: ffffe000  00000000  00000003  ffffe000  00000000  0000fffe  00001802

001b1f20: 00000000  01cb34fe  00008000  00002000  00000000  001b2000  01cb34fe

001b1f40:<01cb2c92><ffa00d94> 02002020  01cb2ee3  0035f8db  01cb2ee2  0035f8da

001b1f60: 00000000  00000000  00000000  00000000  00000000  00000000  00000000

001b1f80: 00000000  00000000  00000000  00000000  00000000  00000000  00000000

001b1fa0: 00000000  00000000  00000000  01b7c2a8  01b7d005  019df098  019df1e8

001b1fc0: 019df214  00aac034  00000000  00aac034  000000c0  00210618  00000001

001b1fe0: 00000003  00001802  00000005  00210618  00000000  00000000  000000c0

001b2000: 321f3030

Return addresses in stack:

    address : <0x000325da> { ___alloc_pages_internal + 0x196 }

    address : <0x00032606> { ___alloc_pages_internal + 0x1c2 }

   frame  1 : <0x000240d0> { _timer_list_show + 0x424 }

    address : <0x000240d0> { _timer_list_show + 0x424 }

    address : <0x0003272e> { ___get_free_pages + 0x1e }

    address : <0x00039d2e> { _do_mmap_pgoff + 0x35a }

    address : <0x00039f58> { _do_mmap_pgoff + 0x584 }

    address : <0x0003e404> { _vfs_read + 0xac }

    address : <0x000038c8> { _sys_mmap2 + 0x48 }

    address : <0xffa0082c> { _system_call + 0x68 }

    address : <0x01cb2c92> [ /lib/ld-uClibc.so.0 + 0x2c92 ]

    address : <0xffa00d94> { _evt_system_call + 0x64 }

Mem-Info:

DMA per-cpu:

CPU    0: hi:    0, btch:   1 usd:   0

Active_anon:0 active_file:4 inactive_anon:0

inactive_file:9 dirty:0 writeback:0 unstable:0

free:3077 slab:446 mapped:0 pagetables:0 bounce:0

DMA free:12308kB min:4096kB low:5120kB high:6144kB active_anon:0kB inactive_anoo

lowmem_reserve[]: 0 0 0

DMA: 51*4kB 33*8kB 20*16kB 14*32kB 11*64kB 9*128kB 6*256kB 3*512kB 2*1024kB 0*2B

13 total pagecache pages

7424 pages RAM

497 pages reserved

14 pages shared

3821 pages non-shared

Allocation of length 2166784 from process 77 failed

DMA per-cpu:

CPU    0: hi:    0, btch:   1 usd:   0

Active_anon:0 active_file:4 inactive_anon:0

inactive_file:9 dirty:0 writeback:0 unstable:0

free:3077 slab:446 mapped:0 pagetables:0 bounce:0

DMA free:12308kB min:4096kB low:5120kB high:6144kB active_anon:0kB inactive_anoo

lowmem_reserve[]: 0 0 0

DMA: 51*4kB 33*8kB 20*16kB 14*32kB 11*64kB 9*128kB 6*256kB 3*512kB 2*1024kB 0*2B

13 total pagecache pages

./analogcl:582: can't map '/usr/lib/libQtCore.so.4'

./analogcl: can't load library 'libQtCore.so.4'

root:/media/analogcl>

This shows that the library with 6MB is now loaded OK but the next with 2MB failed.......

Move the /usr folder onto my flash is impossible because in my board there are only 8MB and the /usr folder has about 15MB.....

- Patrick

TranslateQuoteReplyEditDelete

2009-01-21 08:01:07     Re: change the library-path in uCLinux-2009pre

Patrick Hotz (GERMANY)

Message: 68195   

Hi,

the problem with my low ram seems to be bigger than i think....

My last idea is to link the qt-library static to my programm....

Can somebody give me an example how i can do this?

For testing i would use some of the sample-programms in qt-embedded (tetrix or analogclk).....

I know that i must use -static ore something like that......

regards

- Patrick

TranslateQuoteReplyEditDelete

2009-01-21 14:55:18     Re: change the library-path in uCLinux-2009pre

Mike Frysinger (UNITED STATES)

Message: 68204   

you only need -static when linking

you could also just statically link a few libs (so you still dynamically link with the C library):

... -Wl,-Bstatic -lQt.... -Wl,-Bdynamic ...

QuoteReplyEditDelete

2009-01-22 02:41:22     Re: change the library-path in uCLinux-2009pre

Patrick Hotz (GERMANY)

Message: 68215   

Hi guys,

thank you for your answers, i will have a try today.....

For /usr folder i have an idea...

Is it possible to say that the "make" command creates a uImage without /usr folder??

I want so save this folder on Flash or SD-Card.....

I think the "make" creates a uImage and the /usr folder i can copy manually onto my board...

- Patrick

TranslateQuoteReplyEditDelete

2009-01-22 10:22:24     Re: change the library-path in uCLinux-2009pre

Mike Frysinger (UNITED STATES)

Message: 68244   

there is no way to filter arbitrary paths.  you can edit the romfs/ and then just run `make image`.

QuoteReplyEditDelete

2009-01-22 13:58:47     Re: change the library-path in uCLinux-2009pre

Patrick Hotz (GERMANY)

Message: 68248   

Hi Mike,

thank you for the answers.

I will try it tomorrow.

Also i try a new way to increase my free RAM.... in the other tread..

- Patrick