> * Can you plesae redo this using "ls -ial" rather than "ls -l". That will
> show extra useful info.
details at the end
> * Can you please see if there is anything in lost+found
it is empty all the time.
> * Please show /proc/yaffs before the rm and after the reboot
details at the end
> * Does the problem get cleared up by umount and mount?
no. However, if I make an unclean reboot after dding the second file, the
mount after the reboot makes it consistent again.
Please find details at the end.
I tried to find the cause of the decreasing of free space and I found the
following:
in yaffs_guts.c, around line 3010, in function
yaffs_GarbageCollectBlock():
...
dev->nFreeChunks -= bi->softDeletions;
...
the sum of these during the dd after reboot approx equals the 'lost'
space. Strangely (for me), I found that this function is called with the
same block number several times. I made lots of traces (does not fit into
the serial terminal) and whenever I stop it I see that
yaffs_GarbageCollectBlock() is called with many different block arguments
(ranging from ~800 to ~2000) and every number is printed out 7 times.
I used to trace this printout:
"Collecting block %d, in use %d, shrink %d, wholeBlock %d, soft del %d"
Hope it helps, thanks for the help anyway,
Viktor Babrian
details of commands performed:
/ $ ls -ial /mnt/
1 drw-rw-rw- 1 root root 2048 Jan 1 00:02 .
1 drwxr-xr-x 20 root root 0 Jan 1 00:00 ..
2 drw-rw-rw- 1 root root 2048 Jan 1 00:02 lost+found
/ $ ls -ial /mnt/lost\+found/
2 drw-rw-rw- 1 root root 2048 Jan 1 00:02 .
1 drw-rw-rw- 1 root root 2048 Jan 1 00:02 ..
/ $ df
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/mtdblock5 32768 18176 14592 55% /
tmpfs 63956 0 63956 0% /var/tmp
/dev/mtdblock13 2097152 3840 2093312 0% /mnt
/ $ dd if=/dev/zero of=/mnt/file bs=1M count=100
100+0 records in
100+0 records out
/ $ ls -ial /mnt/
1 drw-rw-rw- 1 root root 2048 Jan 1 00:02 .
1 drwxr-xr-x 20 root root 0 Jan 1 00:00 ..
261 -rw-r--r-- 1 root root 104857600 Jan 1 00:03 file
2 drw-rw-rw- 1 root root 2048 Jan 1 00:02 lost+found
/ $ ls -ial /mnt/lost\+found/
2 drw-rw-rw- 1 root root 2048 Jan 1 00:02 .
1 drw-rw-rw- 1 root root 2048 Jan 1 00:02 ..
/ $ df
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/mtdblock5 32768 18176 14592 55% /
tmpfs 63956 0 63956 0% /var/tmp
/dev/mtdblock13 2097152 106372 1990780 5% /mnt
/ $
/ $ cat /proc/yaffs
YAFFS built:May 19 2009 05:24:47
$Id: yaffs_fs.c,v 1.79 2009/03/17 01:12:00 wookey Exp $
$Id: yaffs_guts.c,v 1.82 2009/03/09 04:24:17 charles Exp $
Device 0 "MAP"
startBlock......... 0
endBlock........... 16383
totalBytesPerChunk. 2048
nDataBytesPerChunk. 2048
chunkGroupBits..... 0
chunkGroupSize..... 1
nErasedBlocks...... 15564
nReservedBlocks.... 5
blocksInCheckpoint. 0
nTnodesCreated..... 3700
nFreeTnodes........ 39
nObjectsCreated.... 200
nFreeObjects....... 95
nFreeChunks........ 996159
nPageWrites........ 0
nPageReads......... 0
nBlockErasures..... 0
nGCCopies.......... 0
garbageCollections. 0
passiveGCs......... 0
nRetriedWrites..... 0
nShortOpCaches..... 10
nRetireBlocks...... 0
eccFixed........... 0
eccUnfixed......... 0
tagsEccFixed....... 0
tagsEccUnfixed..... 0
cacheHits.......... 0
nDeletedFiles...... 0
nUnlinkedFiles..... 0
nBackgroudDeletions 0
useNANDECC......... 1
isYaffs2........... 1
inbandTags......... 0
/ $ rm /mnt/file
**** power cycle
/ $ mount -t yaffs2 /dev/mtdblock13 /mnt/
/ $ cat /proc/yaffs
YAFFS built:May 19 2009 05:24:47
$Id: yaffs_fs.c,v 1.79 2009/03/17 01:12:00 wookey Exp $
$Id: yaffs_guts.c,v 1.82 2009/03/09 04:24:17 charles Exp $
Device 0 "MAP"
startBlock......... 0
endBlock........... 16383
totalBytesPerChunk. 2048
nDataBytesPerChunk. 2048
chunkGroupBits..... 0
chunkGroupSize..... 1
nErasedBlocks...... 15736
nReservedBlocks.... 5
blocksInCheckpoint. 0
nTnodesCreated..... 2900
nFreeTnodes........ 2899
nObjectsCreated.... 200
nFreeObjects....... 95
nFreeChunks........ 1047359
nPageWrites........ 0
nPageReads......... 0
nBlockErasures..... 0
nGCCopies.......... 0
garbageCollections. 0
passiveGCs......... 0
nRetriedWrites..... 0
nShortOpCaches..... 10
nRetireBlocks...... 0
eccFixed........... 0
eccUnfixed......... 0
tagsEccFixed....... 0
tagsEccUnfixed..... 0
cacheHits.......... 0
nDeletedFiles...... 1
nUnlinkedFiles..... 1
nBackgroudDeletions 0
useNANDECC......... 1
isYaffs2........... 1
inbandTags......... 0
/ $
/ $ ls -ial /mnt/
1 drw-rw-rw- 1 root root 2048 Jan 1 00:00 .
1 drwxr-xr-x 20 root root 0 Jan 1 00:00 ..
2 drw-rw-rw- 1 root root 2048 Jan 1 00:00 lost+found
/ $ ls -ial /mnt/lost\+found/
2 drw-rw-rw- 1 root root 2048 Jan 1 00:00 .
1 drw-rw-rw- 1 root root 2048 Jan 1 00:00 ..
/ $ df
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/mtdblock5 32768 18176 14592 55% /
tmpfs 63956 0 63956 0% /var/tmp
/dev/mtdblock13 2097152 3840 2093312 0% /mnt
/ $
/ $ dd if=/dev/zero of=/mnt/file bs=1M count=100
100+0 records in
100+0 records out
/ $ ls -ial /mnt/lost\+found/
2 drw-rw-rw- 1 root root 2048 Jan 1 00:00 .
1 drw-rw-rw- 1 root root 2048 Jan 1 00:00 ..
/ $ ls -ial /mnt/
1 drw-rw-rw- 1 root root 2048 Jan 1 00:00 .
1 drwxr-xr-x 20 root root 0 Jan 1 00:00 ..
262 -rw-r--r-- 1 root root 104857600 Jan 1 00:03 file
2 drw-rw-rw- 1 root root 2048 Jan 1 00:00 lost+found
/ $ df
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/mtdblock5 32768 18176 14592 55% /
tmpfs 63956 0 63956 0% /var/tmp
/dev/mtdblock13 2097152 588664 1508488 28% /mnt
/ $
/ $ cat /proc/yaffs
YAFFS built:May 19 2009 05:24:47
$Id: yaffs_fs.c,v 1.79 2009/03/17 01:12:00 wookey Exp $
$Id: yaffs_guts.c,v 1.82 2009/03/09 04:24:17 charles Exp $
Device 0 "MAP"
startBlock......... 0
endBlock........... 16383
totalBytesPerChunk. 2048
nDataBytesPerChunk. 2048
chunkGroupBits..... 0
chunkGroupSize..... 1
nErasedBlocks...... 15564
nReservedBlocks.... 5
blocksInCheckpoint. 0
nTnodesCreated..... 3700
nFreeTnodes........ 38
nObjectsCreated.... 200
nFreeObjects....... 94
nFreeChunks........ 755012
nPageWrites........ 0
nPageReads......... 0
nBlockErasures..... 628
nGCCopies.......... 0
garbageCollections. 4396
passiveGCs......... 4396
nRetriedWrites..... 0
nShortOpCaches..... 10
nRetireBlocks...... 0
eccFixed........... 0
eccUnfixed......... 0
tagsEccFixed....... 0
tagsEccUnfixed..... 0
cacheHits.......... 0
nDeletedFiles...... 1
nUnlinkedFiles..... 1
nBackgroudDeletions 0
useNANDECC......... 1
isYaffs2........... 1
inbandTags......... 0
/ $ umount /mnt/
save exit: isCheckpointed 1
save exit: isCheckpointed 1
/ $ mount -t yaffs2 /dev/mtdblock13 /mnt/
/ $ df
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/mtdblock5 32768 18176 14592 55% /
tmpfs 63956 0 63956 0% /var/tmp
/dev/mtdblock13 2097152 588664 1508488 28% /mnt
/ $ ls -ial /mnt/
1 drw-rw-rw- 1 root root 2048 Jan 1 00:16 .
1 drwxr-xr-x 20 root root 0 Jan 1 00:00 ..
262 -rw-r--r-- 1 root root 104857600 Jan 1 00:03 file
2 drw-rw-rw- 1 root root 2048 Jan 1 00:16 lost+found
/ $ ls -ial /mnt/lost\+found/
2 drw-rw-rw- 1 root root 2048 Jan 1 00:16 .
1 drw-rw-rw- 1 root root 2048 Jan 1 00:16 ..
/ $
** to force an unclean remount, I change the fs:
/ $ touch /mnt/dummy
** reboot without umount
/ $ mount -t yaffs2 /dev/mtdblock13 /mnt
/ $ ls -ial /mnt/
1 drw-rw-rw- 1 root root 2048 Jan 1 00:00 .
1 drwxr-xr-x 20 root root 0 Jan 1 00:00 ..
263 -rw-r--r-- 1 root root 0 Jan 1 00:00 dummy
262 -rw-r--r-- 1 root root 104857600 Jan 1 00:03 file
2 drw-rw-rw- 1 root root 2048 Jan 1 00:00 lost+found
/ $ ls -ial /mnt/lost\+found/
2 drw-rw-rw- 1 root root 2048 Jan 1 00:00 .
1 drw-rw-rw- 1 root root 2048 Jan 1 00:00 ..
/ $ df
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/mtdblock5 32768 18180 14588 55% /
tmpfs 63956 0 63956 0% /var/tmp
/dev/mtdblock13 2097152 106372 1990780 5% /mnt
/ $
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