I have been able to recreate this problem and am looking at it now.

Thanks to Sharanu for his persistence in pointing this out.

-- CHarles


On Wednesday 22 July 2009 03:16:16 Sharanu TURAMARI wrote:
> Hi,
> I am facing the problem with latest yaffs2 port when the whole flash space
> is occupied.
>
> I am following the below procedure:
>
> - Copy the entire root contents to flash using "find bin boot dev etc home
> init lib media sbin tmp usr var | cpio -pdum /flash" command
> - Recursively copy the contents of flash to different directories in flash
> using "cp -rf * sd0" etc until the flash usage gets 100% and the "
> dev->nErasedBlocks" is 0.
> - After sometimes I am getting "Allocator out " problems.
> - Here onwards flash is completelly unusable since  even deletion fails and
> only formatting will help.
>
> Thoughts that come to mind is:
> - Though nReservedBlocks  is 5 , why yaffs is using all the blocks and
> getting dev->nErasedBlocks as 0.
>
> - I am seeing yaffs_GarbageCollectBlock() is using one more fresh erased
> block in the routine yaffs_WriteNewChunkWithTagsToNAND() it calls when it
> is either a data chunk in live file or an Object header.
>   So, instead of producing blocks it is consuming a block which explains
> that whenever that condition occurs a block is being lost.
>
> - Though the nReservedBlocks is 5 ,  I am not seeing any restrictions on
> the block allocation if it reaches below 5.
>
> - Just for experimentation , I hacked to use reserved blocks only
> yaffs_GarbageCollectBlock()-> yaffs_WriteNewChunkWithTagsToNAND() , and
> other allocations not use it. Thought there it is stopping
> when dev->nErasedBlocks is 8 and no "Allocator out" problems, still flash
> is unusable as not able to delete any file and increase free space usage.
>
> - I am not seeing any erase problem since each  yaffs_GarbageCollectBlock()
> is producing one erased block which is consumed immediately.
>
> - If anybody has done the same experimentaion with yaffs ,please help me to
> solve this.
>
>
> Rgds,
> Sharanu
>
>
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