I have the same problem. I enable YAFFS_TRACE_ALLOCATE, YAFFS_TRACE_GC and YAFFS_TRACE_GC_DETAIL this time. I also capture /proc/yaffs before and after copying file. There are already some bad blocks marked by the last run. It is noticed that there is a soft lockup in the middle. The log is below.


# cat /proc/yaffs
YAFFS built:Nov 23 2006 11:50:15
$Id: yaffs_fs.c,v 1.54 2006/10/24 18:09:15 charles Exp $
$Id: yaffs_guts.c,v 1.45 2006/11/14 03:07:17 charles Exp $
# flash_eraseall /dev/mtd5

Skipping bad block at 0x00000000
Erasing 128 Kibyte @ 20000 --  0 % complete.
Skipping bad block at 0x00040000

Skipping bad block at 0x00060000
<snip>
............
Skipping bad block at 0x00340000

Skipping bad block at 0x00360000
Erasing 128 Kibyte @ 7e80000 -- 99 % complete.
# mount -t yaffs2 /dev/mtdblock5 /yaffs2
[42949509.130000] yaffs: dev is 32505861 name is "mtdblock5"
[42949509.130000] yaffs: Attempting MTD mount on 31.5, "mtdblock5"
[42949509.180000] block 1 is bad
[42949509.180000] block 3 is bad
<snip>
...........[42949509.260000] block 27 is bad
[42949509.270000] block 28 is bad
# cat /proc/yaffsYAFFS built:Nov 23 2006 11:50:15
$Id: yaffs_fs.c,v 1.54 2006/10/24 18:09:15 charles Exp $
$Id: yaffs_guts.c,v 1.45 2006/11/14 03:07:17 charles Exp $

Device 0 "File system"
startBlock......... 0
endBlock........... 1012
chunkGroupBits..... 0
chunkGroupSize..... 1
nErasedBlocks...... 986
nTnodesCreated..... 0
nFreeTnodes........ 0
nObjectsCreated.... 200
nFreeObjects....... 96
nFreeChunks........ 63104
nPageWrites........ 0
nPageReads......... 0
nBlockErasures..... 0
nGCCopies.......... 0
garbageCollections. 0
passiveGCs......... 0
nRetriedWrites..... 0
nRetireBlocks...... 0
eccFixed........... 0
eccUnfixed......... 0
tagsEccFixed....... 0
tagsEccUnfixed..... 0
cacheHits.......... 0
nDeletedFiles...... 0
nUnlinkedFiles..... 0
nBackgroudDeletions 0
useNANDECC......... 1
isYaffs2........... 1# dd if=test_file of=/yaffs2/test_file
[42949586.060000] yaffs: Tnodes added
[42949586.070000] Allocated block 2, seq  4097, 985 left
[42949586.080000] **>> Block 2 needs retiring
[42949586.080000] yaffs_BlockBecameDirty block 2 state 5 needs retiring
[42949586.090000] **>> Block 2 retired
[42949586.090000] Allocated block 29, seq  4098, 984 left
[42949586.100000] **>> Block 29 needs retiring
[42949586.100000] yaffs_BlockBecameDirty block 29 state 5 needs retiring
[42949586.110000] **>> Block 29 retired
[42949586.110000] Allocated block 30, seq  4099, 983 left
[42949586.120000] **>> Block 30 needs retiring
[42949586.130000] yaffs_BlockBecameDirty block 30 state 5 needs retiring
[42949586.130000] **>> Block 30 retired
[42949586.140000] Allocated block 31, seq  4100, 982 left
<snip>
...............
[42949595.250000] **>> Block 425 needs retiring
[42949595.250000] yaffs_BlockBecameDirty block 425 state 5 needs retiring
[42949595.260000] **>> Block 425 retired
[42949595.260000] Allocated block 426, seq  4495, 587 left
[42949595.270000] **>> Block 426 needs retiring
[42949595.270000] yaffs_BlockBecameDirty block 426 state 5 needs retiring
[42949595.280000] **>> Block 426 retired
[42949595.290000] Allocated block 427, seq  4496, 586 left
[42949595.290000] **>> Block 427 needs retiring
[42949595.300000] BUG: soft lockup detected on CPU#0!
[42949595.300000]
[42949595.300000] Pid: 227, comm:                   dd
[42949595.300000] CPU: 0
[42949595.300000] PC is at release_console_sem+0xb0/0x224
[42949595.300000] LR is at release_console_sem+0xac/0x224
[42949595.300000] pc : [<c0047d68>]    lr : [<c0047d64>]    Not tainted
[42949595.300000] sp : c3817b30  ip : 0001a8bf  fp : c3817b5c
[42949595.300000] r10: c02cd49c  r9 : c02cd498  r8 : fffe5741
[42949595.300000] r7 : c026a664  r6 : 60000013  r5 : 0001a8bf  r4 : 0001a8bf
[42949595.300000] r3 : c02cd084  r2 : c0278870  r1 : 0001a8bf  r0 : 0001a8bf
[42949595.300000] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  Segment user
[42949595.300000] Control: C5387F  Table: 83848000  DAC: 00000015
[42949595.300000] [<c00273f8>] (show_regs+0x0/0x50) from [<c0067a1c>] (softlock)[42949595.300000]  r5 = C02EE824
[42949595.300000] [<c00679b0>] (softlockup_tick+0x0/0x84) from [<c0051404>] (do)[42949595.300000]  r4 = 00000000
[42949595.300000] [<c0050fec>] (do_timer+0x0/0x514) from [<c002a834>] (timer_ti)[42949595.300000] [<c002a780>] (timer_tick+0x0/0xf8) from [<c0033390>] (omap2_g)[42949595.300000]  r6 = 00000026  r5 = C3817AE8  r4 = C02ED7D0
[42949595.300000] [<c0033358>] (omap2_gp_timer_interrupt+0x0/0x7c) from [<c0026)[42949595.300000]  r5 = 00000000  r4 = C0269168
[42949595.300000] [<c002632c>] (__do_irq+0x0/0xfc) from [<c0026654>] (do_level_)[42949595.300000]  r8 = C3817AE8  r7 = C0265C88  r6 = C3817AE8  r5 = 00000026
[42949595.300000]  r4 = C02C7A7C
[42949595.300000] [<c00265e8>] (do_level_IRQ+0x0/0xc4) from [<c002670c>] (asm_d)[42949595.300000]  r6 = 60000013  r5 = D80FE000  r4 = C3816000
[42949595.300000] [<c00266ac>] (asm_do_IRQ+0x0/0x154) from [<c0024d90>] (__irq_)[42949595.300000] [<c0047cb8>] (release_console_sem+0x0/0x224) from [<c0048154>)[42949595.300000] [<c0047edc>] (vprintk+0x0/0x330) from [<c0048228>] (printk+0x)[42949595.300000] [<c004820c>] (printk+0x0/0x24) from [<c0116b94>] (yaffs_Write)[42949595.300000]  r3 = 40001055  r2 = 0000000F  r1 = 000001AB  r0 = C0238270
[42949595.300000] [<c01166f8>] (yaffs_WriteNewChunkWithTagsToNAND+0x0/0x560) fr)[42949595.300000] [<c0118e38>] (yaffs_UpdateObjectHeader+0x0/0x3a8) from [<c011)[42949595.300000] [<c011aa78>] (yaffs_MknodObject+0x0/0x16c) from [<c011ad84>] )[42949595.300000] [<c011ad3c>] (yaffs_MknodFile+0x0/0x50) from [<c0112ac8>] (ya)[42949595.300000]  r4 = C38440F8
[42949595.300000] [<c01128e0>] (yaffs_mknod+0x0/0x2b4) from [<c0112c40>] (yaffs)[42949595.300000] [<c0112c00>] (yaffs_create+0x0/0x6c) from [<c0098c80>] (vfs_c)[42949595.300000]  r6 = C3D0E6D0  r5 = 000001A4  r4 = 00000000
[42949595.300000] [<c0098c0c>] (vfs_create+0x0/0xbc) from [<c00993b0>] (open_na)[42949595.300000]  r8 = C3820EE8  r7 = 00000242  r6 = C3820BB8  r5 = C3817F00
[42949595.300000]  r4 = C3820BB8
[42949595.300000] [<c0098ecc>] (open_namei+0x0/0x570) from [<c0087c7c>] (filp_o)[42949595.300000] [<c0087c1c>] (filp_open+0x0/0xa0) from [<c0087f08>] (do_sys_o)[42949595.300000]  r8 = C00252A8  r7 = C3FDD000  r6 = 000001B6  r5 = 00000004
[42949595.300000]  r4 = 00000241
[42949595.300000] [<c0087eb0>] (do_sys_open+0x0/0xf0) from [<c0087fb0>] (sys_op)[42949595.300000] [<c0087fa0>] (sys_open+0x0/0x14) from [<c0025100>] (ret_fast_)[42949595.310000] yaffs_BlockBecameDirty block 427 state 5 needs retiring
[42949595.320000] **>> Block 427 retired
[42949595.320000] Allocated block 428, seq  4497, 585 left
[42949595.330000] **>> Block 428 needs retiring
[42949595.330000] yaffs_BlockBecameDirty block 428 state 5 needs retiring
[42949595.340000] **>> Block 428 retired
<snip>
............

[42949608.540000] **>> Block 998 retired
[42949608.540000] Allocated block 999, seq  5068, 14 left
[42949608.550000] **>> yaffs write required 971 attempts
dd: /yaffs2/test_file: Cannot allocate memory
# cat /proc/yaffs
YAFFS built:Nov 23 2006 11:50:15
$Id: yaffs_fs.c,v 1.54 2006/10/24 18:09:15 charles Exp $
$Id: yaffs_guts.c,v 1.45 2006/11/14 03:07:17 charles Exp $

Device 0 "File system"
startBlock......... 0
endBlock........... 1012
chunkGroupBits..... 0
chunkGroupSize..... 1
nErasedBlocks...... 14
nTnodesCreated..... 100
nFreeTnodes........ 100
nObjectsCreated.... 200
nFreeObjects....... 96
nFreeChunks........ 960
nPageWrites........ 0
nPageReads......... 0
nBlockErasures..... 0
nGCCopies.......... 0
garbageCollections. 0
passiveGCs......... 0
nRetriedWrites..... 970
nRetireBlocks...... 971
eccFixed........... 0
eccUnfixed......... 0
tagsEccFixed....... 0
tagsEccUnfixed..... 0
cacheHits.......... 0
nDeletedFiles...... 0
nUnlinkedFiles..... 1
nBackgroudDeletions 0
useNANDECC......... 1
isYaffs2........... 1
# umount /yaffs2










Charles Manning <manningc2@actrix.gen.nz> wrote: On Tuesday 24 October 2006 16:27, Paul Wang wrote:
> Hi,
>
> Thanks for your valuable answer.
> Yes, I forget to erase the mtdblock first.
>
> After I used "mkyaffs" to erase the block, It shows from /proc/yaffs that
> nEraseblocks is 815. I can write some files without the errors.
>
> Then I got another problem, after I write some files(the total blocksize is
> 13M and I write around 5M data), the nEraseblock went down to 0 and I got
> the same error message again. Even I delete some files and the nEraseblock
> is always 0.
> That means the flash is not fully released.
>
> How to do the garbage collection?
> How can my application know when to do the garbage collection?

The garbage collection is done automatically by yaffgs as a by-product of any 
operation that modifies the file system.

It seems to me that one of two things has happened here:
1) Garbage collection triggering is broken somehow, so yaffs does not triger 
garbage collection.
2) The garbage collection is failing because the erasure is failing or some 
simil;ar problem. Thsi means that attempts to do garbage collection do not 
free up any space.

Try turning on tracing for YAFFS_TRACE_ALLOCATE, YAFFS_TRACE_GC and 
YAFFS_TRACE_GC_DETAIL. These should give a far better indication of what is 
happening.



>
> Regards
> Paul
> ----- Original Message -----
> From: "Charles Manning" 
> To: 
> Cc: "Paul Wang" ; ;
> 
; ;  Sent: Tuesday,
> October 24, 2006 8:23 AM
> Subject: Re: [Yaffs] yaffs problem: !!!!!!!!! Allocator out
> !!!!!!!!!!!!!!!!!
>
> On Sunday 22 October 2006 03:56, Paul Wang wrote:
> > Hello,
> >
> > Sorry to disturb, I saw you discussed this problem last month.
> > Is there any solution?
> >
> > I meet this problem and have no idea what to do.
> > Currently I'm using Linux 2.6.12.
> > And it's a 32M nand flash with 3 mtdbolcks.
> > first 3M bytes              reserved
> > following 16M bytes         file system(cramfs)
> > last 13M bytes              yaffs
> >
> > I can see it reports few bad blocks for the yaffs.
> > I always get this error message
> > -----------------
> > yaffs tragedy: no more eraased blocks
> > !!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!
>
> This happens because you have no erased blocks to use for further
> allocation.
>
> > ---------------------
> > And what I did is just using VI to edit a file(no more than 30 bytes).
> >
> > I have attached the /proc/yaffs file and the message during linux start
> > up.
>
> From the /proc/yaffs
>
> nErasedBlocks...... 0
>
> What you don't say is when you captured the /proc/yaffs and how you got the
> system into this state.
>
> There should never be fewer than about 5 erased blocks.
>
> Can you do the following:
>
> 1) Erase partition
> 2) Mount
> 3) capture /proc/yaffs and output from ls -ial
> 4) Do whatever it is you do to get into this state. With some explanation.
> 5) capture /proc/yaffs.
>
>
> Thanx
>
> -- Charles

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