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List:       uclinux-dev
Subject:    Re: [uClinux-dev] Problems with 2GB FAT16 SD/CF cards - resolved
From:       Greg Ungerer <gerg () snapgear ! com>
Date:       2008-06-26 6:53:50
Message-ID: 48633CFE.7000307 () snapgear ! com
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Hi Wolfgang,

Wolfgang Mües wrote:
> DSLINUX (www.dslinux.org) is using mostly SD cards for file system 
> storage. With the advent of 2 GByte SD cards with FAT16 and 32KByte 
> clustersize, many user have reported problems (data aborts while 
> traversing directories).
> 
> I have found that busybox needs more stack space to fix this problem.
> This was a hard-to-nail-down error, because with directory traversal 
> problems, network scripts fail, gdbserver fails, etc.

Any chance you can try the newest busybox version in the
latest uClinux-dist-test-20080620?

According to the comments in its Makefile.flags:

# Busybox is a stack-fatty so make sure we increase default size
# TODO: use "make stksizes" to find & fix big stack users
# (we stole scripts/checkstack.pl from the kernel... thanks guys!)
# Reduced from 20k to 16k in 1.9.0.
FLTFLAGS += -s 16000


So they have reduced its stack size even further. If this proves
to be too small I'll increase before releasing...

Regards
Greg



> --- trunk/user/busybox/Rules.mak        2007-10-25 18:45:33 UTC (rev 
> 2027)
> +++ trunk/user/busybox/Rules.mak        2007-10-26 17:19:23 UTC (rev 
> 2028)
> @@ -47,7 +47,8 @@
>  # MAKEFILES      = $(TOPDIR).config
>  endif
>  
> -FLTFLAGS       += -s 20000
> +# Note that 20K stack space is too low if we use 2GB SD cards
> +FLTFLAGS       += -s 30000
>  
>  # What OS are you compiling busybox for?  This allows you to include
>  # OS specific things, syscall overrides, etc.
> 
> 
> 

-- 
------------------------------------------------------------------------
Greg Ungerer  --  Chief Software Dude       EMAIL:     gerg@snapgear.com
Secure Computing Corporation                PHONE:       +61 7 3435 2888
825 Stanley St,                             FAX:         +61 7 3891 3630
Woolloongabba, QLD, 4102, Australia         WEB: http://www.SnapGear.com
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