2008-03-19 14:11:17 nandwrite and nfs usage
Andras Szemzo (HUNGARY)
Message: 52766 Hi,
For development, I often use nfs for easy test for new apps. This method worked with 2.6.22, but since I upgraded to the latest kernel, toolchain, u-boot, uclinux-dist, if I put a new compiled app to my nfs server, It always crash with:
BUG: failure at mm/nommu.c:861/do_mmap_private()!
Kernel panic - not syncing: BUG!
I tested video_test, tone, mplayer etc...
If I boot with the fs on NAND, this all works.
Another question is how can I write the my nand jffs2 image to nand with linux. I can write small images with u-boot,
but if example QT is in the rootfs, I cannot do that becouse the size. ( I have 64M on the board, but writing example a 19M image is freezing when I download it to sdram in u-boot)
I tried (eraseall and ) nandwrite /dev/mtd1 rootfs_nand.jffs2 0 but this one is do nasty things with the nand.
I attached the good video_test log and a crash from nfs.
bf532_mm_nommu.txt
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2008-03-19 16:21:22 Re: nandwrite and nfs usage
Robin Getz (UNITED STATES)
Message: 52771 Andras:
trunk is considered experimental right now - we are working the last issues out of the 2008R1 branch - I would suggest that you stick there (unless you really, really need something from trunk).
-Robin
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2008-03-20 03:03:25 Re: nandwrite and nfs usage
Andras Szemzo (HUNGARY)
Message: 52802 Thanks Robin, understood.
In this case I just only report this bug. Running the same apps from example samba share is works, so maybe it's nfs related.
Have you got a hint about my other question, to write jffs2 image to nand from linux?
Thanks,
Andras
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2008-03-20 08:36:38 Re: nandwrite and nfs usage
Robin Getz (UNITED STATES)
Message: 52840 Andras:
you should just be able to write to the /dev/mtdblockn directly. Have you tried that?
-Robin
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2008-03-20 09:42:39 Re: nandwrite and nfs usage
Andras Szemzo (HUNGARY)
Message: 52844 No, I only tried using nandwrite until now, but I'll try evening as you sad.
Thanks and Regards,
Andras
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2008-03-20 13:06:40 Re: nandwrite and nfs usage
Andras Szemzo (HUNGARY)
Message: 52851 Robin:
That works wholly. Thank you for the tip and help.
Regards,
Andras
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2008-03-20 13:34:30 Re: nandwrite and nfs usage
Robin Getz (UNITED STATES)
Message: 52854 Andras:
I'm pretty sure the /dev/mtdblockx should go around bad blocks - but you may want to test to make sure (mark one of the first blocks as bad in U-Boot, and then check with U-Boot (via nand read) to see if things were skipped properly.
-Robin