Hi all,
        I have a samsung nand device K9F1208UOM which is being mounted
perfectly and shows me erasedblocks when i check the proc entry. But
when i try to create/copy etc a file on to the partition i run out of
memory . Below is the log and my nand.c file which i believe tries to
create the  directory but ends up writing to all blocks cause after
the mkdir command the proc entry shows me only 5 eraseblocks .
[root@manav /]#mount -t yaffs /dev/mtdblock3 /mnt/yaffs/
yaffs: dev is 7939 name is "unknown-char(31,3)"
yaffs: dev is 7939 name is "unknown-char(31,3)"
[root@manav /]#df
Filesystem           1k-blocks      Used Available Use% Mounted on
rootfs                   31488      9312     22176  30% /
/dev/mtdblock2           31488      9312     22176  30% /
/dev/mtdblock3           16368       308     16060   2% /mnt/yaffs
[root@manav /]#cat /proc/yaffs
YAFFS built:Nov  4 2004 14:36:33
$Id: yaffs_fs.c,v 1.1.6.2 2003/11/08 10:33:14 bushi Exp $
$Id: yaffs_guts.c,v 1.1.6.4 2004/03/29 12:09:30 bushi Exp $

Device yaffs
startBlock......... 1
endBlock........... 1023
chunkGroupBits..... 0
chunkGroupSize..... 1
nErasedBlocks...... 1003
nTnodesCreated..... 100
nFreeTnodes........ 87
nObjectsCreated.... 100
nFreeObjects....... 90
nFreeChunks........ 32316
nPageWrites........ 0
nPageReads......... 0
nBlockErasures..... 0
nGCCopies.......... 0
garbageCollections. 0
passiveGCs......... 0
nRetriedWrites..... 0
nRetireBlocks...... 0
eccFixed........... 0
eccUnfixed......... 6
tagsEccFixed....... 0
tagsEccUnfixed..... 1018
cacheHits.......... 0
nDeletedFiles...... 0
nUnlinkedFiles..... 0
nBackgroudDeletions 0
useNANDECC......... 0
cd /mnt/yaffs/

[root@manav yaffs]#ls
lost+found
[root@manav yaffs]#mkdir test
Writing data without ECC to NAND-FLASH is not recommended ........
:
:
Writing data without ECC to NAND-FLASH is not recommended
mkdir: Cannot create directory `test': Cannot allocate memory
[root@manav yaffs]#cat /proc/yaffs
YAFFS built:Nov  4 2004 14:36:33
$Id: yaffs_fs.c,v 1.1.6.2 2003/11/08 10:33:14 bushi Exp $
$Id: yaffs_guts.c,v 1.1.6.4 2004/03/29 12:09:30 bushi Exp $

Device yaffs
startBlock......... 1
endBlock........... 1023
chunkGroupBits..... 0
chunkGroupSize..... 1
nErasedBlocks...... 5
nTnodesCreated..... 100
nFreeTnodes........ 87
nObjectsCreated.... 100
nFreeObjects....... 90
nFreeChunks........ 32316
nPageWrites........ 65586
nPageReads......... 31655
nBlockErasures..... 0
nGCCopies.......... 0
garbageCollections. 0
passiveGCs......... 0
nRetriedWrites..... 31934
nRetireBlocks...... 998
eccFixed........... 0
eccUnfixed......... 6
tagsEccFixed....... 0
tagsEccUnfixed..... 1018
cacheHits.......... 0
nDeletedFiles...... 0
nUnlinkedFiles..... 0
nBackgroudDeletions 0
useNANDECC......... 0


I have disabled both  printk (KERN_WARNING "Writing data without ECC
to NAND-FLASH is not recommended\n");
and printk (KERN_WARNING "Reading data from NAND FLASH without ECC is
not recommended\n"); in nand.c but to no avail . My kernel is 2.4.19 
and i have tried enabling both -DCONFIG_YAFFS_USE_NANDECC and
DCONFIG_YAFFS_USE_OLD_MTD in all combo's. Any suggestions would be
great .