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Date: Mon, 01 Dec 2008 07:08:21 -0500
From: Cal Page <pagcal@runbox.com>
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To: "Ostendorf, Rainer" <Rainer.Ostendorf@BENNING.de>
Subject: Re: Problems with JFFS2 FS during parallel write operations
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You might check the locks in mtd. I noticed they were pretty low. It 
might make sense in your case to move them to mtdpart.c or even up into 
yaffs_mtdif2.c for the read/write/erase functions.

Cal Page

Ostendorf, Rainer wrote:
> Hi list,
>
> i'm still working on the problem described in my previous post:
>
> [...]
>   
>> During normal operation the system runs perfectly stable, but when i 
>> start two processes running parallel, writing huge amounts of data 
>> to the flash device, i get error 
>> messages from the JFFS2 filesystem:
>>
>> ...
>> argh. node added in wrong place
>> argh. node added in wrong place
>> ...
>>
>> This message repeats for about 15-20 times while copying parallel 2 
>> files of about 6MByte to the flash via Ethernet (SCP). 
>>     
> [...]
>
> As i can only reproduce the corruption of the JFFS2 FS during parallel access of at leat two processes writing to the flash, i assume that the cause for the corruption is some kind of race-condition. Have there been any known problems/bugs with race conditions, that could lead to an error like this? Would it probably help to upgrade to a newer kernel version? Any hint and help would be greatly appreciated.
>
> best regards,
> Rainer
>
>
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