how to extend the initrd to a customed size ?

how to extend the initrd to a customed size ?

[zhangbingchen]

Hello!
  I have a board of Custom 860 with 16M RAM memory,which is running the specific linux kernel
  mpc8xx-2.1.3 obtained from bossek.now,I desire to enlarge the size of initrd from 4M to 6M to
 enable the initrd to contain the gigantic libc.so.6 with the size of morethan 4M;to do so,i have modified
 the line rd_size=6144 in .../drivers/block/rd.c file and the ramdisk.image has also been modified correspondly by now.
 But,to my puzzled,the console just displays the panic message:No init found and then reboots while running.
  I am sure there is no wrong with my ramdisk.image since it can be mountted correctly with
 6M size.
 That is all and I 'd be very thankful with your help or suggestion.

   regards
   john , zhang

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Re: how to extend the initrd to a customed size ?

[Frank Smith]

If you strip libc.so.6 it gets much smaller; my specific version went from
4115403 to 1032312 bytes.

-Frank.


zhangbingchen wrote:
>
> Hello!
>   I have a board of Custom 860 with 16M RAM memory,which is running the specific linux kernel
>   mpc8xx-2.1.3 obtained from bossek.now,I desire to enlarge the size of initrd from 4M to 6M to
>  enable the initrd to contain the gigantic libc.so.6 with the size of morethan 4M;to do so,i have modified
>  the line rd_size=6144 in .../drivers/block/rd.c file and the ramdisk.image has also been modified correspondly by now.
>  But,to my puzzled,the console just displays the panic message:No init found and then reboots while running.
>   I am sure there is no wrong with my ramdisk.image since it can be mountted correctly with
>  6M size.
>  That is all and I 'd be very thankful with your help or suggestion.
>
>    regards
>    john , zhang
>

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Re: how to extend the initrd to a customed size ?

[Graham Stoney]

zhangbingchen writes:
>   mpc8xx-2.1.3 obtained from bossek.now,I desire to enlarge the size of
> initrd from 4M to 6M to enable the initrd to contain the gigantic libc.so.6
> with the size of morethan 4M...

I suggest you reconfigure/rebuild your glibc with:
CFLAGS="-msoft-float -Os -DNDEBUG=1"

It shouldn't be more than 1.2 M or so.

Regards,
Graham
--
Graham Stoney
Principal Hardware/Software Engineer
Canon Information Systems Research Australia
Ph: +61 2 9805 2909  Fax: +61 2 9805 2929

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